addendum no. 4 tender call no. 260-2016 for the ... · drawing a4.00 indicates which roof area...

Michael Pacholok Director

Purchasing and Materials Management Division City Hall, 18th Floor, West Tower 100 Queen Street West Toronto, Ontario M5H 2N2

Joanne Kehoe Manager Construction Services

November 23, 2016 Via Internet Posting – 65 pages

ADDENDUM NO. 4

TENDER CALL NO. 260-2016

FOR THE REPLACEMENT OF ROOFING SYSTEM, WINDOW REPLACEMENT AND

INSTALLATION OF SAFETY ANCHOR SYSTEM AT

NORTH YORK CIVIC CENTRE, 5100 YONGE ST., TORONTO.

CLOSING DATE: NOVEMBER 29, 2016 12:00 NOON (LOCAL TIME)

Please refer to the above Request for Tender (RFT) document in your possession and be advised of the

information as outlined below:

1. Questions & Answers:

See attached for questions & answers for this project.

2. Clarifications/Revisions to specs & drawings:

See attached for Clarifications/Revisions to specs & drawings.

Should you have any questions regarding this addendum, please contact Brenda Duffley at email:

[email protected] or fax (416) 397-7779.

Please attach this addendum to your Request for Tender document and be governed accordingly. Bidders must

acknowledge receipt of all addenda on the space provided on the Tender Call Cover Page as per the Process

Terms and Conditions, Section 1, Item 8 - Addenda, of the Tender Call document. All other aspects of the

Tender remain the same.

Yours truly,

Joanne Kehoe

Manager, Construction Services

Purchasing & Materials Management

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mailto:[email protected]

Tender Call No. 260-2016

Addendum No. 4

Questions & Answers:

Q1. On the specification in section 07 55 10 page 1 of 11 under 1.3. Existing Roof Assemblies all roof

components contradict with the section 07 55 57 page1 and 2 of 14 under Part 1-General, section

3.1 Description of work and section 4.4. Existing roof assemblies.

A1. Replace Section 07 55 10, Page 1 of 11 under 1.3. Existing Roof Assemblies with:

“Refer to Section 07 55 57, 4.4 Existing Roof Assemblies.”

Q2. On the specification documents section 07 55 00page 4 of 11 under Part 2 - products the new roof material calling for 2 ply system , no ballast gravel, when on the drawings A4.00 section 1,2,3 new roof assembly shown ballast system . Its contradict each other. Please clarify the existing roof assembles and a new roof system.

A2. Drawing A4.00 indicates which roof area receives which Roof Type assembly.

Q3. What is the warranty period for the roofing?

A3. Refer to: Specification Section 07 55 10 Item 1.7 Warranty

Specification Section 07 55 57 Item 1.12 Warranty and 1.13 System Warranty

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ADDENDUM

Morrison Hershfield | Suite 300, 125 Commerce Valley Drive West | Markham, ON L3T 7W4, Canada Page 1 of 2 Tel 416 499 3110 Fax 416 499 9658 | morrisonhershfield.com

PROJECT: North York Civic Centre 5100 Yonge Street, Toronto, ON Roofing and Glazing Replacement Project

ADDENDUM: No. 04

PROJECT No.: 1151055.00/ Tender 260-2016 DATE: Nov. 22, 2016

1.0 INTENT:

1.1 This Addendum provides modifications and clarifications to Tender documents issued for the North York Civic Centre Roofing and Glazing Replacement Project at 5100 Yonge St., Toronto, ON.

1.2 This Addendum forms part of, and shall be included with, the Tender documents for the above noted project.

1.3 After entering into contract, consideration will not be given to requests for extra costs as a result of a Contractor being unfamiliar with this Addendum.

1.4 Bidders shall acknowledge receipt of this Addendum in the bid submission.

2.0 CLARIFICATIONS/REVISIONS TO SPECIFICATIONS:

2.1 SECTION 01 11 02 TECHNICAL GENERAL CONDITIONS

Refer to PART 1, .2 SIGNIFICANT TRADES

ADD .4 Modified Bitumen Roofing – SECTION 07 55 10

2.2 SECTION 07 55 10 MODIFIED BITUMEN ROOFING

Refer to PART 1, 1.4 Quality Assurance

DELETE:

1.4.1 The Contractor in this section shall be a member of good standing with OIRCA, CRCA and have a minimum of 5 years proven experience or prior approval of the manufacturer that he can comply with proper application procedures of the work specified herein. Proof of experience shall be submitted.

2.3 The following specification sections have been replaced in whole:

a. Section 01 00 00 Payment Schedule

b. Section 01 34 00 Mock-Ups

c. Section 01 45 00 Quality Control

d. Section 08 80 00 Glazing

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Tender Addendum No.: 04

Page 2 of 2

e. Section 08 93 00 Curtain Wall Rehabilitation

f. Section 08 54 00 Aluminum Curtain Wall & Skylight

3.0 CLARIFICATIONS/REVISION TO DRAWINGS:

3.1 The following drawings replace the current drawings. Changes/clarifications have been

clouded on drawings. A1.02 Roof Plan-Glazing Work, Addendum – Revision 1, dated 2016/11/16 A1.03 Roof Plan-Roofing Work, Addendum – Revision 1, dated 2016/11/16 A2.00 Elevations – North and South, Addendum - Revision 1, dated 2016/11/16 A2.01 Elevations – East and West, Addendum - Revision 1, dated 2016/116 A5.00 East Elevation Skylight – Enlarged Plans, Addendum - Revision 1, dated 2016/116 M1.00 Mechanical Specifications, Addendum - Revision 1, dated 2016/11/15 M2.00 Mechanical Roof Plan, Addendum - Revision 1, dated 2016/11/15 M3.00 Mechanical Fourth Floor Plan, Addendum - Revision 1, dated 2016/11/15

3.2 Revise note on drawing A5.01 – East Sloped Skylight Section A Revise note pertaining to smoke vent as follows:

“RE-USE EXISTING SMOKE VENT OPERATING MOTORS AND CONTROLS FOR NEW VENT OPENINGS. RE-USE EXISTING BRANCH CIRCUITS FOR MOTORS AND CONTROLS. VERIFY FIRE ALARM SYSTEM AND CONTROL OF SMOKE VENTS.”

3.3 Revision to drawings E5.00 – Electrical Specifications: a. ADD the following section to Electrical Specifications:

283100 FIRE ALARM SYSTEM

1. PROVIDE MODIFICATIONS TO DEVICES, CIRCUITS AND/OR SYSTEMS THAT ARE OPERATED BY

THE FIRE ALARM SYSTEM AS SHOWN ON DRAWINGS. 2. VERIFY FIRE ALARM SYSTEM IN ACCORDANCE WITH CAN/ULC-S537-13 AFTER

MODIFICATIONS TO DEVICES, CIRCUITS AND/OR SYSTEMS THAT ARE OPERABLE BY THE FIRE ALARM SYSTEM.

End

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MORRISON HERSHFIELD LIMITED SECTION 01 00 00 5100 YONGE STREET – ROOF AND GLAZING REPLACEMENT OCTOBER 2016 PAYMENT SCHEDULE- REV 1 PAGE 1 OF 7

DIVISION 01 — GENERAL REQUIREMENTS

SECTION 01 00 00 — PAYMENT SCHEDULE

This section is intended to provide a guideline for completion of the Tender Submission Pricing Form. This section identifies the scope to be included in broad terms only. Contractor to refer to the entire contract documents for details. The cost for completion of the entire scope of work as specified in the contract documents is to be included in the contract price.

PART 1 - BASE BID ITEMS

1.1 ITEM 1.0: GENERAL REQUIREMENTS

.1 Item 1.1 MOBILIZATION, DEMOBILIZATION, AND GENERAL REQUIREMENTS

.1 Mobilize all equipment and labour for this work. Conform to all general requirements as specified in the bid documents. Provide all necessary labour, equipment, and materials necessary to conform to the General Requirements. Work must be conducted in accordance with Occupational Health & Safety Act & Regulations for Construction Projects (O. Reg. 85/04) as amended.

.2 These include but are not limited to the establishment of base site survey and elevation plan, temporary lighting, heating, temporary enclosures, etc. Provide and erect all barriers, fencing, and signage necessary to protect project staff, building elements, vehicular and pedestrian traffic. Include all necessary construction signage and traffic control and coordination. Signage to be properly lettered and visible in a manner acceptable to the Owner’s representatives. Contractor to inspect the condition and operation of all existing roof top mechanical units, and provide a written statement to the Owner indicating unit operation or otherwise prior to project commencement.

.3 The job site is to be kept to be clear of all obstructions impeding pedestrian traffic and violating fire egress requirements.

.4 Upon completion of the work demobilize all equipment and excess materials. Provide all required documentation, manuals and warranties as requested in the specifications. Arrange for completion meeting with Owner and Consultant.

.5 Payment for this item will be released based on the percentage of work completed and the Contract Lump Sum Price.

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MORRISON HERSHFIELD LIMITED SECTION 01 00 00 5100 YONGE STREET – ROOF AND GLAZING REPLACEMENT OCTOBER 2016 PAYMENT SCHEDULE – REVISION 1 PAGE 2 OF 7

.2 Item 1.2 Mock-up/Testing

.1 This item to include contractor cost for providing access, equipment and materials for mockups to be prepared as specified under Section 01 34 00 Mock-ups.

.2 This item to include contractor cost for providing access and equipment for site testing as specified in Section 01 45 00 Quality Control. Cost for testing to be included in contract price, unless specified otherwise.

.3 Payment for this item will be released based on the percentage of work completed and the Contract Lump Sum Price.

1.2 ITEM 2.0: MASONRY

.1 This item includes all labour, materials and equipment required to complete full masonry restoration at areas indicated on drawings.

.2 ITEM 2.1 Complete full brick replacement and mortar repointing at Brick Areas 1, 2 and 3, as indicated on drawings. Brick replacement and mortar repointing under this item will not count towards unit rate replacement of ITEM 2.2 and ITEM 2.3.

.3 ITEM 2.2 This item to include up to 1000 units of brick replacement at areas indicated by consultant. Brick replacement to include required mortar replacement and will not count towards ITEM 2.3

.4 ITEM 2.3 This item to include up to 300LM of mortar repointing, at areas to be selected by Consultant.

.5 Payment for this item will be based on percentage of work completed and the Contract Lump Sum Price.

1.3 ITEM 3.0 ROOFING

.1 This item applies to all roof areas below. Include the cost to complete all aspects and requirements outlined in the contract documents including but not limited to access, storage, protection, removal and disposal of existing roof assembly, metal flashing and auxiliary components. Cost for each roof section to also include supply and installation of new roof assembly, metal flashing, roof anchors, and auxiliary components. Bidders are reminded to review the “Pre-Renovation Designated Substances and Hazardous Materials Assessment,” dated May 5, 2016, prepared by Environmental Consulting Occupational Health, as several roofing areas contain designated substances.

.2 This item also includes all repairs to the surrounding area including all roofing and/or roof equipment damaged during installation.

.3 This item includes all labour, materials and equipment required to upgrade existing roof safety system including but not limited to installation of new anchors, safety travel / fall arrest lines and testing of all new and existing roof anchors.

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.4 This item to include all required cut and patch, repairs and repainting to ceiling and

wall space for completion of scope of work of this section.

.5 Payment for this item will be based on the percentage of work completed and the Contract Lump Sum Price, per breakdown as indicate below:

.1 ITEM 3.1 Roof Areas A and F

.2 ITEM 3.2 Roof Areas B and G

.3 ITEM 3.3 Roof Areas C, D and E

.4 ITEM 3.4 Roof Areas H and I

.5 ITEM 3.5 Roof Areas J, K, L and M

.6 ITEM 3.6 Stair Roofs 1,2, 3 & 4

.7 ITEM 3.7 Canopy Roofs 1, 2 & 3

.6 Roofing ITEM 3.0 also includes the following work:

.1 ITEM 3.8 Ladders, Freestanding Guardrails and Exterior Fall Arrest Cables: This item includes all labour, materials and equipment required to modify existing ladders, provide new ladders, install exterior all arrest cables, as indicated on Contract Drawings. This item includes supply and installation of freestanding guardrails as indicated on drawings.

.2 ITEM 3.9 Skylight Mobile Platform: This item includes all labour, materials and equipment required to design, fabricate and install mobile platform on existing skylight window washing tracks.

.3 ITEM 3.10 Interior Fall Arrest Cable System: This item includes all labour, materials and equipment required to supply and install anchors and cable on horizontal roof sections under east skylight SG01.

.4 ITEM 3.11 Mechanical Roofing: This item includes all labour, materials and equipment required to disconnect, remove and dispose of existing roof drains, PVC pipes and the installation of new roof drains complete with cast iron rain water leaders and reconnect to the existing storm system. Item to include relocation of section of gas line on roof.

1.4 ITEM 4.0 SLOPED GLAZING/CURTAIN WALL/METAL SIDING

.1 The following applies to all sloped glazing areas, curtain walls and metal siding areas, identified as part of the scope of work. Cost to include all access to identified areas, protection of building, site, and people, removal and disposal of existing material and the supply and installation of new material as specified in the Contract Documents.

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.2 All Items to include all necessary site investigation and verification for preparation of

shop drawings.

.3 All Items to include all hoarding and protection required for area of work.

.4 All areas to include patch and repair of interiors spaces directly adjacent to the work.

.5 For all areas of siding replacement, include 10% of insulation replacement and 10% of Z-girt replacement.

.6 Provide bird-friendly glazing in the form of acid etched glazing at locations indicated on drawings and as per specifications.

.7 Provide bird-friendly surface-applied film on glazing at locations indicated on drawings and as per specifications.

.8 Payment of this item will be released based on the percentage of work completed and the Contract Lump Sum Price, per areas as indicated below:

.1 ITEM 4.1 East Elevation Skylight SG01 & SG02:

.1 This item to include removal and disposal of existing skylight system at SG01 and SG02 and installation of new skylight system.

.2 This item to also include removal and disposal of existing clerestory window glazing, and select areas of framing under the east elevation atrium skylight (SG01).

.3 This item to include supply and installation of new clerestory window along base of east elevation atrium skylight (SG01), new skylight system SG01 and SG02, as indicated on drawings.

.4 This item to include removal of existing roof vents on horizontal roof sections, patching vent openings.

.5 This item to include remove and disposal of truss cover metal flashing and insulation and clean and repaint of exposed truss members.

.6 This item to also include cleaning and painting of exposed structural steel framing and interior horizontal metal panels.

.2 ITEM 4.2 West Vestibule Skylight SG03: This item includes removal and disposal of existing skylight system and supply and installation of new skylight system.

.3 ITEM 4.3: East Elevation Lower Skylight, Siding and Windows: SG04, CW06, CW07, CW16 and East Elevation Sloped Metal Roof, MP01, as follows:

.1 This item to include removal and disposal of existing skylight system SG04 and replacement with new skylight system. New skylight to be

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able to accommodate specified Building Integrated Photovoltaic (BIPV) panels at locations indicated.

.2 This item to include removal and disposal of clerestory window CW06 and supply and install of new curtain wall system windows.

.3 This item to include removal and disposal of curtain wall system CW07, installation of new concrete curb at sill, and supply and installation of new curtain wall system.

.4 This item includes all labour, materials and equipment required to remove and dispose of the curtain wall snap caps, pressure plates, glazing and accessories, to expose the existing interior aluminum frames at CW16. Supply and install new snap cap, pressure plate, glazing and accessories (for complete system) on existing frames to match existing.

.5 This item to include bird-friendly glazing on all areas of east elevation lower ground and ground level vertical and sloped glazing.

.6 This item includes removal and disposal of existing metal siding above windows CW06, and supply and install new as specified in contract documents.

.7 This item to include clean and repainting of metal siding(sides and top) around two louvres on east elevation between CW06.

.8 This item includes removal and replacement of sloped metal panel roof and underlayment above skylight SG04. Item to include 10% of plywood sheathing replacement.

.9 Item to include cleaning and painting of exposed structural steel framing under SG04 and behind CW07.

.10 This item includes gutter and downspouts at location shown on contract drawings at SG04

.4 ITEM 4.4 East Wing Skylight, Siding and Windows: SG05, CW14 and CW15

.1 This item includes all labour, materials and equipment required to remove and dispose of existing skylight SG05 frames and glazing, including all vertical glazing connected to SG05, as indicated on contract drawings. Supply and install skylight system and vertical glazing system as specified in contract documents.

.2 This item includes all labour, materials and equipment required to remove and dispose of the curtain wall snap caps, pressure plates, glazing and accessories, to expose the existing interior aluminum frames at CW14 and CW15. Supply and install new snap cap, pressure plate, glazing and accessories (for complete system) on existing frames to match existing.

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.3 This item to include bird-friendly glazing on all areas of glazing SGo5,

CW14 and CW 15.

.4 This item includes all labour, materials and equipment required remove and dispose of existing metal siding at all elevations of east wing and supply and install new as specified in contract documents.

.5 ITEM 4.5 West Elevation Stairwell Curtain Wall and Siding: CW01, CW02, CW03 & CW04

.1 This item includes all labour, materials and equipment required to remove and dispose of the curtain wall snap caps, pressure plates, glazing and accessories, to expose the existing interior aluminum frames. Supply and install new snap cap, pressure plate, glazing and accessories (for complete system) on existing frames to match existing.

.2 This item includes all labour, materials and equipment required remove and dispose of existing metal siding at all elevations of stair well and supply and install new as specified in contract documents.

.6 ITEM 4.6 West Elevation Strip Windows: CW12a and CW12b and North Elevation Window CW13

.1 This item includes all labour, materials and equipment required to replace existing glazing and window stops from the interior at CW12a, CW12b and CW13.

.2 This item to include interior patch repair of gypsum board and repainting.

.7 ITEM 4.7 North and South Elevation Curtain Wall, CW05 and CW09 and metal siding on North and South Elevations

.1 This item includes all labour, materials and equipment required to remove and dispose of the curtain wall snap caps, pressure plates, and accessories at curtain wall CW05 and CW09 and replacement with new.

.2 This item includes replacement of 10% of glazing units at areas to be identified by Consultant. Glazing units to match existing.

.3 Prior to reinstallation of new, clean and reseal to allow for clear drainage.

.4 Provide new metal flashing at top of curtain wall and sill of curtain wall as indicated on drawings.

.5 This item includes removal and disposal of existing metal siding above curtain wall and supply and install of new siding.

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.6 This item to include replacement of all metal spandrel panels.

.7 This item to include surface-application of bird-friendly film.

.8 ITEM 4.8 Electrical Work at Skylights and Roof

.1 This item includes all labour, materials and equipment required to connect new skylight smoke vents to existing electrical system.

.2 This item to include all include all required cut and patch, repairs to interior/exterior walls, ceilings to complete the scope of work of this section.

.3 This item includes provision of snowmelt system to lower east elevation skylight.

.4 Item to include provision of three dedicated 220V/30AMP outlets on Roof H for mobile platform. Client will provide power supply to one central point on roof.

1.5 ITEM 5.0 BUILDING INTEGRATED PHOTOVOLTAIC (BIPV)

.1 This item includes all labour, materials and equipment to all supply and install BIPV Solar Panels and associated electrical connections to facilitate the operation of the BIPV Panels, and display system.

.2 This item to include all include all required cut and patch, repairs to interior/exterior walls, ceilings to complete the scope of work of this section.

.3 Payment of this item will be released based on the percentage of work completed and the Contract Lump Sum Price.

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MORRISON HERSHFIELD LIMITED SECTION 01 34 00 5100 YONGE STREET – ROOFING AND GLAZING REPLACEMENT OCTOBER 2016 MOCK UPS – REVISION 1 PAGE 1 OF 4

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 34 00 — MOCK UPS

PART 1 GENERAL

.1 WORK INCLUDED:

.1 This section specifies general requirements and procedures for the preparation of mockups at sloped glazing areas, a stand-alone mockup and a test opening for review by Consultant and Owner. All other mockups, shop drawing submission requirements, sample materials submission requirements are included within respective Specification sections.

.2 After award of contract and prior to start of general installation, install representative sections of the skylight assembly (fixed opening and operable window) together with all relevant hardware and perimeter seals in locations specified. Remove and dispose of existing sloped glazing systems in mockup areas.

.3 Complete mockup(s) and test opening(s) in locations indicated on Drawing A1.02 Roof Plan-Glazing Work.

.4 Mockup 1 to include the installation of new glazing at the two sloped glazing sections on the north side of the sloped roof edge at Gridline L in Drawing A1.02. Mockup to include all elements that are part of the final construction as specified. Both mockup glazing insulated glass units for this mockup in this are to be fixed glazing. Remove lower sloped glazing panels as necessary to gain access.

.5 Mockup 2 to include installation of new sloped glazing on either side of the track assembly at Gridline F in Drawing A1.02. One IG on the south side of the track, and two on the north side of the track are part of the mockup (total of 3 glazing panels), and includes the installation of a new operable unit to match the current location. Allow for one glazing unit to have 10% less VLT than specified glazing. Mockup to include all elements that are part of the final construction as specified. Remove lower sloped glazing as necessary to gain access.

.6 Test opening #1 to be conducted at the lower sloped glazing area (SG04), to the north side of the expansion joint at Gridline M in Drawing A1.02. Three sloped sections are to be removed to expose the connection at the expansion joint. Test opening to include the vertical glazing and outboard parapet wall up to the top of the parapet. Reinstate a waterproof condition after completion of test opening.

.7 The mockup installations included in this section are for working out installation procedures only and may only remain as part of the finished work if written approval is provided by the Consultant.

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.8 Mockup shop drawings and material samples are to be submitted for review by Consultant and Owner prior to mockup construction.

.9 Mockup is to be constructed, and reviewed, by the Owner and Consultant prior to the ordering of skylight materials and glass and metal elements.

.10 Reviewed and accepted mockups will represent the standards of workmanship and material against which installed final work will be verified.

.2 RELATED SECTIONS:

.1 Aluminum Curtain Wall and Skylight Section 08 54 00

.2 Glazing Section 08 80 00

.3 SKYLIGHT MOCKUP SUBMISSION REQUIREMENTS:

.1 Submit shop drawings that indicate the understanding of the mockup requirements, including:

.1 Date, and any revision dates.

.2 Project title and number.

.3 Contractor's name and address.

.4 Name and address of:

.1 Subcontractor

.2 Supplier.

.3 Manufacturer.

.4 Fabrication details and materials with fully labelled components.

.5 Original drawings, or modified standard drawings provided by Contractor, to illustrate all mockup dimensions, location on site, and comparison to actual building configuration and measurements.

.6 Cross-reference shop drawing information to applicable portions of Contract Documents.

.7 Other pertinent data.

.2 Submit product data relevant to the mockup construction as per applicable portions of the Contract Documents.

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.3 Submit shop drawings for sloped glazing mockup(s) and test opening(s) prior to construction of the mockups. Allow four (4) business days for review of skylight mockup submissions. Do not begin construction of mockup until review of submissions is provided.

PART 2 PRODUCTS

.1 MATERIAL:

.1 All products and materials used during mockups are to be new and match applicable portions of the Contract Documents.

PART 3 EXECUTION

.1 GENERAL:

.1 Verify location of mockup on site with Consultant and Owner.

.2 Construct mockup to mimic the configuration and connection details to the surrounding building elements in the location specified.

.3 Add veneer system to existing sloped glazing framing in accordance with specifications.

.4 Ensure adequate protection to building and occupants in areas that may be affected by the mockup(s).

.5 Complete the following:

.1 Area of Mockup 1 to be located at main east skylight as indicated and include:

.1 Connection of sloped glazing at top bottom and sides and transition from bottom to new vertical clerestory

.2 Transition from veneer system to tubular section.

.3 Transition from new system to end wall condition.

.4 Removal of interior clerestory glazing.

.5 Removal of metal roof panels between trusses.

.6 Skylight framing connections to structural members.

.2 Area of Mockup 2 to be located at main east skylight as indicated. Mockup to include the following details:

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.1 Connection of sloped glazing at top, bottom and sides and transition from bottom to new vertical clerestory.

.2 Transition from veneer system to tubular section.

.3 Removal of interior clerestory glazing.

.4 Removal of metal roof panels between trusses.

.5 Skylight transition to window washing track.

.6 Skylight framing connections to structural members.

.7 Allow for one glazing unit to have visible light transmission (VLT) approximately 30%, to allow for comparison with specified glazing units as per Section 08 80 00 Glazing.

.3 Upon direction of Consultant and Owner, remove and dispose of sloped glazing mockup(s) from site.

.4 Test Opening 1 to be located at lower east skylight and include parapet, vertical curtain wall, sloped metal roofing, and clerestory windows. Test opening to involve exposing, at a minimum, the following details:

.1 Transition of sloped glazing to sloped metal panel.

.2 Transition of sloped glazing to vertical curtain wall.

.3 Sloped glazing framing connections to structural members.

.5 Maintain test opening area in a water tight condition until permanent repairs/replacement are completed in this area.


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MORRISON HERSHFIELD LIMITED SECTION 01 45 00 5100 YONGE STREET – ROOF AND GLAZING REPLACEMENT OCTOBER 2016 QUALITY CONTROL – REVISION 1 PAGE 1 OF 3

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 45 00 — QUALITY CONTROL

PART 1 GENERAL

.1 SECTION INCLUDED:

.1 Inspection and testing, administrative and enforcement requirements.

.2 RELATED SECTIONS:

.1 Submittals555555555555555555555. ..Section 01 33 00

.2 Mock Ups .............................................................................. Section 01 34 00

.3 Closeout Submittals .............................................................. Section 01 77 00

.3 QUALITY CONTROL REVIEW:

1 Allow Consultant access to Work. If part of Work is in preparation at locations other than Place of Work, allow access to such Work whenever it is in progress.

.2 Give timely notice requesting review if the Work is designated for special tests, inspections or review by Consultant. A minimum of 48 hours is required.

.3 If Contractor covers or permits to be covered Work that has been designated for special tests, inspections or approvals before such is made, uncover such Work, have inspections or tests satisfactorily completed and make good such Work.

.4 Consultant may order any part of Work to be examined if Work is suspected to be not in accordance with Contract Documents. If, upon examination such work is found not in accordance with Contract Documents, correct such Work and pay cost of examination and correction.

.4 INDEPENDENT INSPECTION AGENCIES:

.1 Testing Agency: Engage a qualified independent testing and inspecting agency, approved by Owner and Consultant, to perform field tests and inspections and prepare test reports.

.5 ACCESS TO WORK:

.1 Allow inspection/testing agencies access to Work.

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.2 Co-operate to provide reasonable facilities for such access.

.6 PROCEDURES:

.1 Notify appropriate agency, Owner and Consultant in advance of requirement for tests, in order that attendance arrangements can be made.

.2 Submit samples and/or materials required for testing, as specifically requested in specifications. Submit with reasonable promptness and in an orderly sequence so as not to cause delay in Work.

.3 Provide labour and facilities to obtain and handle samples and materials on site. Provide sufficient space to store and cure test samples.

.7 REQUIRED TESTS:

.1 The following tests are considered mandatory and will be paid from the Cash Allowance:

.1 Water Spray test in accordance with AAMA 501.2, to be performed by Independent Testing Agency

.2 Locations of testing to be identified by Consultant.

.3 Contractor to provide all forces, hoses and access necessary for this work.

.4 Owner will supply all water necessary to undertake these tests.

.8 REJECTED WORK:

.1 Remove defective Work, whether result of poor workmanship, use of defective products or damage and whether incorporated in Work or not, which has been rejected by Consultant as failing to conform to Contract Documents. Replace or re-execute in accordance with Contract Documents.

.2 Make good other work damaged by such removals or replacements promptly.

.9 REPORTS:

.1 Submit 5 copies of inspection and test reports to Consultant.

PART 2 PRODUCTS

.1 Not Applicable

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PART 3 EXECUTION

.1 Not Applicable


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MORRISON HERSHFIELD LIMITED SECTION 08 80 00 5100 YONGE STREET - ROOF & GLAZING REPLACEMENT OCTOBER 2016 GLAZING – REVISION 1 PAGE 1 of 13

DIVISION 08 — OPENINGS

SECTION 08 80 00 — GLAZING

PART 1 — GENERAL

1.1 DESCRIPTION

.1 This section specifies the design, fabrication, supply and all services necessary to complete glass and glazing work of this Section in accordance with the Contract Documents.

.2 All requirements of this Section and Division 1 apply to this Section.

1.2 RELATED SECTIONS

.1 Section 07 92 00 – Joint Sealant.

.2 Section 08 54 00 - Aluminum Curtain Wall & Skylight.

.3 Section 08 93 00 – Curtain Wall Rehabilitation

1.3 DEFINITIONS

.1 Manufacturers of Glass Products: Firms that produce primary glass, fabricated glass, or both, as defined in referenced glazing publications.

.2 Overall Unit Thickness and Thickness of Each Lite: Dimensions indicated for insulating-glass units are nominal and the overall thicknesses of units are measured perpendicularly from outer surfaces of glass lites at unit's edge. Glass Thicknesses: Indicated by thickness designations in millimeters according to ASTM C 1036, Standard Specification for Flat Glass.

.3 Interspace: Space between inner and outer lites of an insulating-glass unit (IGU) that contains dehydrated air or other specified gas.

.4 Deterioration of Coated Glass: Defects developed from normal use that are attributed to the manufacturing process and not to causes other than glass breakage and practices for maintaining and cleaning coated glass contrary to manufacturer's written instructions. Defects include peeling, cracking, and other indications of deterioration in metallic coating.

.5 Deterioration of Insulating Glass: Failure of hermetic seal under normal use that is attributed to the manufacturing process and not to causes other than glass breakage and practices for maintaining and cleaning insulating glass contrary to manufacturer's written instructions. Evidence of failure is the obstruction of vision by dust, moisture, or film on interior surfaces of glass.

.6 Deterioration of Laminated Glass: Defects developed from normal use that are attributed to the manufacturing process and not to causes other than glass breakage and practices for maintaining and cleaning laminated glass contrary to manufacturer's written instructions. Defects include edge separation, delamination materially obstructing vision through glass, and blemishes exceeding those allowed by referenced laminated-glass standard.

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.7 Sealed Insulating Glass Unit Surface Designations:

.1 Double glazing/Double pane sealed IGU:

.1 Surface 1 - Exterior surface of the outer glass lite.

.2 Surface 2 - Interspace surface of the outer glass lite.

.3 Surface 3 - Interspace surface of the inner glass lite.

.4 Surface 4 - Interior surface of the inner glass lite.

.2 Triple Glazing IGU (Sloped glazing application, with laminated on interior side):

.1 Surface 1 - Exterior surface of the outer glass lite.

.2 Surface 2 - Interspace surface of the outer glass lite.

.3 Surface 3 - Interspace surface of the outer laminated glass lite.

.4 Surface 4 – Interior surface of outer laminated glass lite in contact with PVB.

.5 Surface 5 – Exterior surface of inner laminated glass lite in contact with PVB.

.6 Surface 6 – Interior surface of the inner laminated glass lite.

1.4 DESIGN & PERFORMANCE REQUIREMENTS

.1 Design and provide glazing systems capable to withstand, without any detrimental effects to appearance and performance, wind and impact loads and thermal movement based on temperature range expected in accordance with local Codes, based on climatic information, 10 year probability.

.2 Insulating glass unit manufacturers shall have certification to CGSB-12.8 or ASTM E 2190 and related standards for the IGU assembly to be provided (spacer, connector, desiccant, sealant, gas fill) in accordance with IGMA seal durability test program (for CGSB-12.8 test standard) or IGMA/IGCC seal durability test programs (for ASTM E 2190 and related test standards). Certification shall be consistent with the requirements for IGU components as set out in this specification.

.3 Glass thickness designations indicated are minimums and are for detailing only. Confirm glass thicknesses by analyzing Project loads and in-service conditions. Provide glass lites in the thickness designations indicated for various size openings, but not less than thicknesses and in strengths (annealed, heat treated or laminated) required to meet or exceed the following criteria.

.1 Thickness shall be determined in accordance with CAN/CGSB-12.20-M, “Structural Design for Glass in Buildings”, including wind and guard loading requirements defined in part 4 of the Ontario Building Code.

.2 Design windload: As indicated on Drawings.

.3 Design snow load: As indicated on Drawings

.4 Probability of Breakage for Vertical Glazing: 8 lites per 1000 for lites set vertically or not more than 15 degrees off vertical and under wind action.

.5 Probability of Breakage for Sloped Glazing: 1 lite per 1000 for lites set more than 15 degrees off vertical and under wind and snow action.

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.6 Maximum Lateral Deflection: For the following types of glass supported on all 4 edges, provide thickness required that limits center deflection at design wind pressure to 1/50 times the short side length or 1 inch (25 mm), whichever is less.

.1 For monolithic-glass lites heat treated to resist wind loads.

.2 For insulating glass.

.3 For laminated-glass lites.

.7 Thermal Movements: Provide glazing that allows for thermal movements resulting from the following maximum change (range) in ambient and surface temperatures acting on glass framing members and glazing components. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

.1 Temperature Change (Range): 120 deg F (67 deg C), ambient; 180 deg F (100 deg C), material surfaces.

.8 Thermal and Optical Performance Properties: Provide glass with performance properties specified based on manufacturer's published test data, as determined according to procedures indicated below:

.1 For monolithic-glass lites, properties are based on units with lites 6.0 mm thick.

.2 For laminated-glass lites, properties are based on products of construction indicated.

.3 For insulating-glass units, properties are based on units of thickness indicated for overall unit and for each lite.

.4 Center-of-Glass Values: Based on using LBL-44789 WINDOW 5.0 computer program for the following methodologies:

.1 U-Factors: NFRC 100 expressed as Btu/ sq. ft. x h x deg F (W/sq. m x K).

.2 Solar Heat Gain Coefficient: NFRC 200.

.3 Solar Optical Properties: NFRC 300.

.9 Unless otherwise indicated, select glass lite thickness and width of spacer to provide overall, nominal IGU thickness of 32mm (1 3/8") for all fixed slope openings (for sizes up to 5’ x 9’) and laminate curtain wall glazing, and 25mm (1”) for all curtain wall applications.

.1 Unless otherwise indicated, both inboard and outboard lites shall have the same thicknesses.

.2 Unless otherwise indicated, minimum Glass thickness to be not less than 6.0mm (1/4”).

.10 Size glazing unit to provide a minimum edge clearance between edge of unit and skylight/curtain wall frame in accordance with IGMA recommendations.

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.11 Ensure continuity of building enclosure vapour and air barrier using glass and glazing materials as follow:

.1 Utilize inner light of multiple light sealed units for continuity of air and vapour seal.

1.5 REFERENCES

Comply with the requirements of the following documents (latest edition)

.1 Canadian General Standards Board (CGSB)

.1 CAN/CGSB-12.1, Tempered or Laminated Safety Glass.

.2 CAN/CGSB-12.3, Flat, Clear Float Glass.

.3 CAN/CGSB-12.4-M91, Heat Absorbing Glass.

.4 CAN/CGSB-12.8, Insulating Glass Units.

.5 CAN/CGSB-12.9-M91, Spandrel Glass.

.6 CAN/CGSB-12.20, Structural Design of Glass in Buildings.

.2 American Society for Testing and Materials (ASTM)

.1 ASTM C162 - Standard Terminology of Glass and Glass Products

.2 ASTM C1036 - Standard Specification for Flat Glass.

.3 ASTM C1048 - Standard Specification for Heat-Treated Flat Glass -- Kind HS, Kind FT Coated and Uncoated Glass.

.4 ASTM C1087, Standard Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural Glazing Systems.

.5 ASTM C1376 - Standard Specification for Pyrolytic and Vacuum Deposition Coatings on Glass.

.6 ASTM E1300 - Standard Practice for Determining the Minimum Thickness and Type of Glass Required to Resist a Specified Load.

.7 ASTM E2188 - Standard Test Method for Insulating Glass Unit Performance.

.8 ASTM E2189 - Standard Test Method for Testing Resistance to Fogging in Insulating Glass Units.

.9 ASTM E2190 - Standard Specification for Insulating Glass Unit Performance and Evaluation.

.10 ASTM E 2269, Standard Test Method for Determining Argon Concentration in Sealed Insulating Glass Units using Gas Chromatography.

.3 Insulating Glass Manufacturer Alliance (IGMA)

.1 North American Glazing Guidelines for Sealed Insulating Glass Units for Commercial and Residential Use”

.2 IGMA Publication for Sloped Glazing: IGMA TB-3001, "Guidelines for Sloped Glazing”.

.4 Glass Association of North America (GANA):

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.1 GANA Glazing Manual

.2 GANA Laminated Glazing Reference Manual.

.5 Laminators Safety Glass Association (LSGA).

.1 LSGA Laminated Glass Design Guide.

.6 CPSC 16 CFR 1201 - Safety Standard for Architectural Glazing Materials.

.7 American Architectural Manufacturers Association:

.1 AAMA GDSG-1, "Glass Design for Sloped Glazing",

.2 AAMA TIR A7, "Sloped Glazing Guidelines”.

.8 Ontario Building Code (OBC) 2012.

.9 Occupation Health and Safety Act and Regulations for Construction Projects.

1.6 PROJECT ADMINISTRATIVE REQUIREMENTS

.1 Pre-Fabrication Meeting/Site Visit to:

.1 Verify project requirements.

.2 Examine existing conditions and conduct field verification of site dimensions.

.2 Ensure key personnel, site supervisor, project manager and subcontractor representatives attend.

.3 Owner and Consultant will submit written notification of change to meeting schedule established upon contract award 24 hours prior to scheduled meeting.

1.7 SUBMITTALS

.1 Submit in accordance with Division 1 – General Requirements, Section 01 33 00 – Submittals.

.2 Upon project award, submit a letter from IGMA certifying that manufacturer(s) of the IGUs to be provided for this project are currently certified by IGMA.

.3 Product Data:

.1 Submit manufacturer's instructions, printed product literature and data sheets for glass, perimeter sealants, and glazing accessories and include product characteristics, performance criteria, physical size, finish and limitations.

.2 Submit product data for bird-deterrent film.

.4 Samples:

.1 Submit two (2) samples of each type of finished glass products. Each sample to be 300 mm x 300 mm, clearly showing, tempered and laminated glass, low E coatings, thermal spacer, and sealant. Samples to show acid etching as specified. Samples to show surface-applied bird- friendly markings as specified.

.2 Submit samples for the following:

.1 Insulating glass for each designation indicated.

.2 Spandrel glass indicated.

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.3 Sample of bird-friendly film: 300 x 300 size showing specified pattern.

.4 Submit samples for review and written approval of the Owners prior to fabrication and/or placing order for project.

.5 Product Certificates: Signed by manufacturers of glass and glazing products certifying that products furnished comply with requirements.

.1 For solar-control low-e-coated glass, provide documentation demonstrating that manufacturer of coated glass is certified by coating manufacturer.

.6 Qualification Data: For installers.

.7 Preconstruction Adhesion and Compatibility Test Report: From glazing sealant manufacturer indicating glazing sealants were tested for adhesion to glass and glazing channel substrates and for compatibility with glass and other glazing materials.

.8 Manufacturer’s Documents

.1 Certificates: submit product certificates signed by manufacturer certifying materials comply with specified performance characteristics and criteria and physical requirements.

.2 Installation instructions.

.9 Test Reports: certified test reports from qualified testing agency showing compliance with specified performance characteristics and physical properties.

.1 Submit testing and analysis of glass under provisions of Section 01 45 00 - Quality Control.

.2 Submit shop inspection and testing for glass.

.3 Submit for each type of glass: tinted glass, coated glass, insulating glass, sealants.

.10 Closeout Submittals

.1 Submit in accordance with Section 01 77 00 – Close-out.

.2 Operation and Maintenance Data: submit operation and maintenance data for glazing for incorporation into manual.

.3 Manufacturer’s written instruction for cleaning solutions, materials and procedures for bird deterrent film.

.11 At the shop review stage, submit samples

.1 Submit two 12" x 12" (300mm x 300mm) insulating glass unit sample of each type to demonstrate colour, appearance and performance properties of new insulating glass units.

.2 Submit two 12" x 12" (300mm x 300mm) of spandrel glass to demonstrate colour, appearance and performance properties of new glass units.

1.8 QUALITY ASSURANCE

.1 All of the IGUs to be provided for this project shall be manufactured by an Insulating Glass Manufacturer Alliance (IGMA) certified member. IGUs shall be identified as required by the IGMA Certification Program with the IGMA

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trademark, company name, location of production facility, and year of manufacture.

.2 Provide notice for the Consultant and/or Owner to inspect IGUs prior to installation.

.3 The Consultant and/or Owner may visit the IGU manufacturer’s facilities during manufacture/fabrication of products to be installed on this project. If requested, the Contractor shall arrange for access for the Consultant to that manufacturer’s facility to examine manufacture of the products for this project.

.4 Assembly methods and materials will be examined during visit to manufacturer. Manufacturer shall make IGMA required daily quality control records available for review by Consultant and Owner.

.5 The Consultant will inspect the IGUs (on site and/or in plant). Destructive testing may be performed to confirm concealed details. IGUs not manufactured in accordance with IGMA certification and as otherwise detailed in this Section shall be replaced at no cost to the Owner. Causes for rejection may include:

.1 Both the primary and secondary seals shall provide a completely continuous seal around the perimeter of each unit. IGUs containing discontinuities in either the primary or secondary seals at the corners or along the length of the spacer will be rejected.

.2 Warm edge spacer shall be straight and evenly set into the glass units and the primary sealant shall not extend past the inside edge of the spacer into vision area.

1.9 DELIVERY, STORAGE AND HANDLING

.1 Deliver, store and handle all sealed glazing units in strict accordance with manufacturer’s instructions and Insulating Glass Manufactures Alliance (IGMA) recommendations.

.2 Glass and glazing units must be kept upright, and blocked or strapped to prevent falling. Storage areas should be ventilated and dry. Glazing units should not be stored in direct sunlight, and cases stored outside must be covered and ventilated to prevent damage from rain and condensation.

.3 When removing glazing units from cases or handling loose units extreme care must be taken to prevent breakage, edge damage or seal damage. Carry glazing upright using straps or vacuum cups on both sides. Do not slide glazing on their sealed edges.

.4 Loose glazing units must be set at a slight tilt off vertical on blocks as quarter points. Blocking must be tapered or wedged to provide a flush support so that the individual lites cannot slide out of alignment causing seal failure or breakage.

1.10 WARRANTY

.1 For the work of this Section (material warranties) the warranty period is extended to the following from the date of substantial performance.

.1 Manufacturer's Special Warranty for Coated-Glass Products: Manufacturer's standard form, made out to Owner and signed by coated-glass manufacturer agreeing to replace coated-glass units that deteriorate as defined in "Definitions" Article, f.o.b. the nearest shipping point to Project site, within specified warranty period indicated below.

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.1 Warranty Period: Ten (10) years from date of Substantial Completion.

.2 Manufacturer's Special Warranty on Laminated Glass: Manufacturer's standard form, made out to Owner and signed by laminated-glass manufacturer agreeing to replace laminated-glass units that deteriorate as defined in "Definitions" Article, f.o.b. the nearest shipping point to Project site, within specified warranty period indicated below.


.3 Manufacturer's Special Warranty on Insulating Glass: Manufacturer's standard form, made out to Owner and signed by insulating-glass manufacturer agreeing to replace insulating-glass units that deteriorate as defined in "Definitions" Article, f.o.b. the nearest shipping point to Project site, within specified warranty period indicated below.


.4 Manufacturer’s warranty for bird-friendly film. Warranty against defects in materials for period of six (6) years and labour for one (1) year, commencing from date of Substantial Completion.

.2 Should premature glazing failure occur (or any defect or fault related to material installation), replace failed/defective product(s) with new products to be supplied and installed (matching the project requirements) at no additional charge to the Owners. Premature failure shall include, but not be limited to, the following:

.1 cracking of glass lites (inboard and/or outboard lites).

.2 chemical and/or water vapour fogging on glass surfaces exposed to the air space (inner surface of outer pane and outer surface of inner pane - also referred to glass surfaces #2 and #3).

.3 liquid water intrusion and accumulation within the air space.

.4 inward migration of spacer above window opening sight line.

.5 corrosion of spacer.

.6 failure of perimeter sealants (secondary and/or primary sealants) as evidenced by debonding of sealants from glass surface and/or glass slippage.

.7 Leakage and deterioration caused by improper installation of glazing.

PART 2 PRODUCTS

2.1 GLASS COMPONENTS:

.1 Design of Glass:

.1 Clear Float glass: to CAN/CGSB-12.3.

.2 Design of glass thickness and type of glass for use in all window systems is to be performed by the contractor in accordance with CAN/CGSB-12.20 and the Ontario Building Code (latest edition). If not indicated, minimum glass thickness is defined further below.

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.3 All safety glass to meet the requirements in accordance with CAN/CGSB-12.1-M, “Tempered or Laminated Safety Glass” as follows:

.1 Type 2 (Tempered)

.2 Class B (Float)

.3 Category II, as appropriate for size of lites.

.4 Manufacturer of tempered glass shall have IGMA certification for the thickness of glass to be provided for this project.

.5 Tempering is to be performed using the horizontal tongue-free method, using a double quench air cooling when glass exits tempering oven.

.4 Glass for Spandrel Application

.1 for Spandrel area: Minimum 6mm (1/4") thick, heat strengthened, monolithic, with pacification coating on #2 surface (Opacicoat by ICD), colour to be selected by Owners. Conform to CAN/CGSB-12.9M, “Spandrel Glass”“.

.5 The glass/IGUs shall be designed by the Contractor’s Professional Engineer to meet the applicable Code requirements for guard loads.

.6 Laminated Glass: ASTM C 1172, and complying with CAN/CGSB-12.1, type 1, class B, and other requirements specified and with the following:

.1 Interlayer: Polyvinyl butyral (PVB), minimum thickness of 1.5mmwith a proven record of no tendency to bubble, discolor, or lose physical and mechanical properties after laminating glass lites and installation.

.2 For polyvinyl butyral interlayers, laminate lites in autoclave with heat plus pressure.

.3 Laminating Process: Fabricate laminated glass to produce glass free of foreign substances and air or glass pockets.

.7 Glass type

.1 IGU-1: Skylight (Sloped application, including operable vents and vertical glazing as indicated on AS.00 Window Schedule): Overall IGU thickness of 32mm.

.1 Outer Lite

.1 Thickness: min. 6mm

.2 Kind: Fully tempered

.3 Tint Colour: “Pure Bronze” by AGC, Solarbronze by PPG, or approved equivalent

.4 Coating: Low-E coating on Surface 2: “Energy Select 25” by AGC, Solarban 60 by PPG or approved equivalent.

.2 Inner Lite: laminated glass made of minimum 4mm HS clear glass pane with 1.5mm PVB interlayer.

.2 IGU-2: Curtain wall (vertical application): Overall IGU thickness of 25mm.

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.1 Outer pane: minimum 6mm thick glass;

.1 Thickness: min. 6mm

.2 Kind: Fully tempered

.3 Tint Colour: “Pure Bronze” by AGC, Solarbronze by PPG, or approved equivalent

.4 Coating: Low-E coating on Surface 2: “Energy Select 25” by AGC, Solarban 60 by PPG, or approved equivalent.

.2 Inner panel: minimum 6mm thick glass, clear tempered

.3 Where bird friendly/deterrent glass is required as indicated on Window Schedule, AS.00, the following are required on the IGU units specified:

.1 Acid etched pattern on Surface 1.

.2 Acid etching by Walker Glass, or approved alternate, providing 10 year warranty.

.3 Pattern: 5mm diameter circles spaced 50mm x 50mm.

.4 Where bird-friendly/deterrent film is specified on IGU, the following product is to be supplied and installed:

.1 Single layer poly vinyl chloride, 50.8 microns with permanent adhesive applied to Surface 1 of IGU.

.2 Visible marker sized 5mm diameter circles spaced 50mm x 50mm.

.3 Materials Manufacturer: Symmetry Series by Convenience Group Inc.

2.2 IGU COMPONENTS:

.1 Insulating glass units shall include warm-edge spacer.

.1 Size spacer to provide minimum 12 mm (1/2 in.) cavity between glass panes (unless otherwise indicated).

.2 The spacer shall be continuous and fabricated with bent corners and fused butt joint(s). Assembly with connectors such as corner keys will only be considered if approved by IGMA.

.3 Acceptable IGU spacer: Stainless steel low conductivity warm edge spacer, with continuous welded seam.

.4 Spacer shall include desiccant (molecular sieve, gel or approved equivalent) as listed under the IGMA certification program. The desiccant shall be suitable (type and quantity) for perimeter sealants used, and to avoid negative/inward deflection of the glass panes and/or inward migration of the spacer, and perimeter sealant system due to excessive adsorption of gasses other than water vapour.

.5 Perimeter Sealant System: dual seal, with primary and secondary sealants as follows:

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.1 Primary Seal: polyisobutylene (PIB). The post-fabrication width of the PIB when measured from the top to the bottom of the spacer shall be a minimum of 3mm (1/8").

.2 Secondary Seal: two component structural silicone seal such as Dow 983 by Dow Corning, IGS 3723 by Momentive Performance Products, or JS-562 by Tremco.

.1 For non structural glazing application, The post fabrication thickness of the secondary sealant when measured from the centre of the spacer to the glass edges shall be a minimum of 3mm (1/8”).

.2 For structural glazing application, the post fabrication thickness of the structural silicone secondary sealant shall be calculated based on the design loads and longest smallest dimension openings but should not be less than the minimum specified in previous paragraph.

.6 IGU Inert Gas Fill:

.1 Use argon gas, minimum 90% concentration (initial fill), and 80% minimum after weather cycling (IGMA program – GCIA rating – “Yes") to meet the minimum requirement of CAN/CGBS-12.8-M, "Insulating Glass Units”.

PART 3 EXECUTION

3.1 FABRICATION

.1 Fabricate units to requirements of CAN/CGSB-12.8, ASTM E 2190 and related standards.

.2 Fabricate glazing units in sizes required to glaze openings indicated for Project, with edge and face clearances, edge and surface conditions, and bite complying with written instructions of product manufacturer and referenced glazing publications, to comply with system performance requirements.

3.2 IGU ASSEMBLY

.1 Each IGU for this project consists of the following components: Outer and Inner lites (or laminated lite), Low-E coating, argon gas, perimeter seals and spacer with dessicant or dessicated matrix.

.2 Fill spacer cavities with desiccant in accordance with desiccant manufacturer’s instructions, and immediately assemble spacer frame.

.3 If corner keys are used, seal each corner key individually with PIB by one of the following methods:

.1 Wrapping corner key legs with extruded PIB ribbon prior to insertion of key into spacer;

.2 Injection of PIB after insertion of key into spacer; or

.3 Coating exposed portion of key with PIB after insertion into spacer.

.4 Ensure the bond lines on the spacer and glass shall be free of debris, fingerprints or other substances which may adversely affect the bond and performance.

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.5 If required, edge delete coatings as per manufacturer’s recommendations.

.6 Apply sufficient PIB around the entire spacer frame assembly perimeter on both sides of the spacer to achieve complete PIB wet out onto glass surfaces #2 and #3.

.7 Glass Edges (inner and outer glass panes):

.1 Edges of glass panes Shall be clean-cut, without shark teeth greater than 1/2 of pane thickness, deep serration hackle or serration hackle with spalls, chips greater than 1/4 in. (6 mm) in diameter or 1/2 thickness of glass pane in depth, and impact damage of any type.

.2 To mitigate risk of glass breakage, edges of tempered and heat treated glass panes shall be eased/arrissed to remove sharp edges and corners that can be easily damaged and cause glass to shatter.

.8 Place spacer frame with all sides parallel to edges of glass pane. All sides of frame shall be equal dimension from the glass edge. Forward glass panes and spacer to argon gas chamber.

.9 Once all the components are in the argon gas chamber, control ambient conditions in the chamber to meet the specified requirement for % gas content. When equipment has reached specified argon gas requirements, proceed with assembly and compression of IGUs. Once assembled and compressed (and before proceeding to the next work station, verify that:

.1 The PIB is continuous and in contact with glass and spacer around the entire perimeter of the assembly (on both glass surfaces).

.2 The post-fabrication width of the PIB is at least 3mm (1/8") as measured from the top to the bottom of the spacer.

.3 The PIB does not extend past the opening sight line by more than 1mm.

.4 The spacer is located such that the top portion of the spacer (visible through glass) is flushed with the sight line of the glazed assembly.

.10 Apply and tool structural secondary sealant around the full perimeter of IGU as per the sealant manufacturer’s recommendations. Verify that:

.1 The sealant is installed in a continuous operation around the entire perimeter of the assembly and to the full depth of the cavity created by the metal spacer in between glass surfaces #2 and #3.

.2 Once cured, the sealant is minimum 3mm (1/8") thick as measured from the centre of the spacer to the glass edges.

.11 Labelling:

.1 All glass shall bear manufacturers' labels indicating quality. Labels shall be left in place until final cleaning.

.12 Store IGUs as per IGMA recommendations. IGUs shall not be stored in direct sunlight and shall not be stored outside during the curing period. Follow the sealant manufacturer’s recommendations for curing prior to shipping to site. Secondary perimeter sealant shall be thoroughly cured before shipment to site.

3.3 IGU INSTALLATION

.1 Refer to Section 08 54 00, “Aluminum Curtain Wall & Skylight”

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.2 Refer to Section 08 93 00, “Curtain Wall Rehabilitation”.

3.4 BIRD FRIENDLY FILM

.1 Install in accordance with manufacturer’s written instruction.


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MORRISON HERSHFIELD LIMITED Section 08 54 00 5100 YONGE STREET – ROOF AND GLAZING REPLACEMENT OCTOBER 2016 ALUMINUM CURTAIN WALL & SKYLIGHT PAGE 1 of 18

DIVISION 08 — OPENINGS

SECTION 08 54 00 — ALUMINUM CURTAIN WALL & SKYLIGHT

1. GENERAL

1.1. The work of this section includes, but is not limited to, the removal of existing

system, the supply, fabrication and installation of thermally broken aluminum curtain wall and skylight systems, including operable vents for access and smoke vents in the sloped glazing, and the supply and installation of new curtain wall system (framing and glazing) on the east elevation as shown in Drawings.

1.2. Related Work

1.2.1. Section 01 34 00 - Mock-ups 1.2.2. Section 07 92 00 – Joint Sealant 1.2.3. Section 08 80 00 – Glazing 1.2.4. Section 08 93 00 – Curtain Wall Rehabilitation

1.3. Environmental Conditions

1.3.1. Work shall not proceed if weather at time of installation, or if immediate

forecast is for weather which may result in damage to exposed wall elements or interior finishes and furnishings of building.

1.3.2. Glazing installation on site shall not be carried out at temperatures below

5°C. Should it become necessary to carry out the work at temperatures below 5°C, inform Consultant and consult the glazing sealant manufacturer's representative. Proceed on their written instructions only.

1.3.3. Fabrication of unitized frame and application of structural silicone sealant

shall be carried in a controlled environment by a qualified and pre-approved sealant manufacturer applicator. The application of the sealant shall be approved and reviewed by the sealant manufacturer.

1.4. Design & Performance Requirements

1.4.1. Design curtain wall and skylight systems to withstand and to allow for the

anticipated movement of the building structure, without any detrimental effects to appearance and performance, wind loads, snow loads, and temperature range expected in geographical area of this project (as per Ontario Building Code, latest edition, climatic information, 1 in 50 year probability, unless specified otherwise).

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1.4.2. Curtain wall and skylight systems and relevant interface detailing shall be designed to conform to current edition of following standards (latest edition), as applicable:

1.4.2.1. AAMA 1600, “AAMA/WDMA Voluntary Specification for Skylights” 1.4.2.2. AAMA-501.2, “Quality Assurance and Diagnostic Water Leakage Field

Check of Installed Storefront, Curtain Walls, and Sloped Glazing Systems”.

1.4.2.3. AAMA-503, “Voluntary Specification for Field Testing of Storefronts, Curtain Walls, and Sloped Glazing Systems”.

1.4.2.4. AAMA CW-10, "Care and Handling of Architecture Aluminum from Shop to Site".

1.4.2.5. CAN3-S157-M, “Strength Design in Aluminum” 1.4.2.6. CAN/CGSB-12-20-M, “Structural Design of Glass for Buildings” 1.4.2.7. CSA A440-M, “Windows” 1.4.2.8. IGMA, “Glazing Recommendations for Sealed Insulating Glass Units” 1.4.2.9. Aluminum Association (AA) Designation System for Aluminum

Finishes 1.4.2.10. CSA W59.2-M, “Welded Aluminum Construction” 1.4.2.11. Sheet Metal and Air Conditioning Contractor’s National Association,

Inc., Sixth Edition - September 2003 1.4.2.12. National Building Code, and/or Ontario Building Code, latest edition. 1.4.2.13. AAMA CW-13 - Structural Sealant Glazing Systems. 1.4.2.14. ASTM C719 - Standard Test Method for Adhesion and Cohesion of

Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle). 1.4.2.15. ASTM C794 - Standard Test Method for Adhesion-In-Peel of 1.4.2.16. Elastomeric Joint Sealants. 1.4.2.17. ASTM C920 - Standard Specification for Elastomeric Joint Sealants. 1.4.2.18. ASTM C1036 - Standard Specification for Flat Glass. 1.4.2.19. ASTM C1048 - Standard Specification for Heat-Treated Flat Glass -

Kind HS, Kind FT Coated and Uncoated Glass. 1.4.2.20. ASTM C1087 - Standard Test Method for Determining Compatibility of

Liquid-Applied Sealants with Accessories used in Structural Systems. 1.4.2.21. ASTM C1172 - Standard Specification for Laminated Architectural Flat

Glass. 1.4.2.22. ASTM C1248 - Standard Test Method for Staining of Porous

Substrate by Joint Sealants. 1.4.2.23. ASTM C1401 - Standard Guide for Structural Sealant Glazing. 1.4.2.24. ASTM E283 - Standard Test Method for Determining the Rate of Air

Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen.

1.4.2.25. ASTM E330/E330M - Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference.

1.4.2.26. ASTM E331 - Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls, by Uniform Static Air Pressure Difference.

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1.4.3. Curtain wall and skylight systems shall meet the following minimum performance levels:

1.4.3.1. Air Infiltration/ Exfiltration Leakage/ Resistance:

1.4.3.1.1. Air leakage shall not exceed 0.06 cfm per square foot (0.3 L/(s*m2)) of fixed wall areas when tested in accordance with ASTM E283 (Field Test: ASTM E-783) at a static air pressure difference of 1.57 psf (75 Pa)

1.4.3.1.2. For skylight system, Air leakage shall not exceed 0.05 cfm per square foot of fixed wall areas when tested in accordance with ASTM E283 (Field Test: ASTM E-783) at a static air pressure difference of 10 psf (480 Pa).

1.4.3.2. Water Penetration Resistance: No uncontrolled water penetration

when curtain wall and skylight systems are tested in accordance with ASTM E331 (Field Test: ASTM-E1105), static air pressure difference used in the test shall not be less than 20% of the inward acting design wind load with a minimum of 400 Pa and a maximum of 600.

1.4.3.3. Wind load Resistance: C3 rating.

1.4.4. Deflection Limitations:

1.4.4.1. The deflection of any framing member in a direction normal to the

plane of the wall when subjected to design loads shall not exceed 1/175 of its clear span, or less if required by glass or insulating glass manufacturer with full recovery of glazing materials.

1.4.4.2. Unless otherwise stated, the deflection of any member in a direction

parallel to the plane of the curtain wall and skylight, when carrying its full dead load, shall not exceed an amount which will reduce the glass bite below 50% of the design dimension and the member shall have a 3mm minimum clearance between itself and the top of the fixed panel, glass, or other fixed part immediately below. Under design load, the clearance between the member and an operable window shall be at least 1.5mm.

1.4.4.3. Provide structural calculation to confirm deflection limitations.

1.4.5. Follow IGMA recommendations for IGU installation. Moving setting blocks

closer than 150mm from the corner of the opening is not acceptable. Size insulating glass units, exterior glazing gasket and interior glazing gasket tape to ensure proper compression of the interior glazing gasket.

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1.5. Submittals

1.5.1. Submit after bid submission:

1.5.1.1. A copy of laboratory test reports for the curtain wall and skylight systems indicating compliance with performance levels specified in this section, and including detailed drawings of test specimen, stamped and signed by certified testing agency. Testing agencies to be certified and accredited to perform all lab performance tests required in this section. Lab tested skylights shall be identical in every respect to skylights to be installed in building.

1.5.1.2. Proposed typical details including but not limited to perimeter of the

opening (curb and head/roof flashing details) and connections to adjacent assemblies, conforming to the requirements of this Section.

1.5.2. Following award of contract and prior to installation of mock-up, submit:

1.5.2.1. Sample(s) of proposed curtain wall and skylight, including all seals,

glazing materials, IGUs and all hardware for operable window inserts. Submit color samples of specified finishes. Sample(s) submitted shall be complete and identical in every respect to system to be installed in building.

1.5.2.2. Submit production run samples of all components to be used for the structurally glazed skylight system for adhesion and compatibility testing by the silicone sealant manufacturer. Provide a written recommendation on the surface preparation required and compatibility for each component.

1.5.2.3. Based on design windload and project dimensions, submit calculation for the sealant bite for the structural glazing tensile bead (between IGU and skylight frame) and the IGU secondary sealant (between inner and outer lites).

1.5.3. On completion of work:

1.5.3.1. Supply three (3) copies of operations, maintenance and glazing

instructions.

1.6. Shop Drawings

1.6.1. Following award of contract:

1.6.1.1. Proceed with the installation of a mock-up(s) as outlined in Section 01 34 00 Mock-Ups for the purpose of determining as built conditions confirming proposed details.

1.6.2. After completion and approval of the mock-up, submit three (3) copies of the

shop drawings showing:

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1.6.2.1. All components of the curtain wall and skylight in as large scale as

practical, showing layouts (overall height and width), methods of interfacing with adjacent cladding, corner/interface details, coupling of framing members, vertical and horizontal sections, type and properties of metal alloy, thickness of all components, finishes, perimeter sealants (interior and exterior), size, number and location of drain/vent holes, IGU, operable vents, and spandrel panel glass thickness(es) including a description of perimeter seals, spacer and corner treatment, certification label (for IGU) and other pertinent details relevant to glazing (such as gaskets, setting blocks...).

1.6.2.2. Selected anchorage (location, type, size, model and manufacturer) to

surrounding walls and structure. Anchorage shall be designed to meet the minimum requirements of the latest edition of the Ontario Building Code.

1.6.3. Shop drawings shall be stamped by professional engineer having a valid

license to practice in the place of work.

1.6.4. Ordering of materials and the start of fabrication shall not commence until shop drawings have been reviewed and approved by Owners and Consultants.

1.7. Quality Control – Curtain wall and Skylight Manufacturer

1.7.1. The curtain wall and Skylight contractors are responsible for all aspects of quality control of the contract including quality control of sub-trades and material suppliers. The curtain wall and skylight contractors plant fabrication and assembly processes shall be organized to allow prompt and efficient quality control review of both incoming source materials and work in process.

1.7.2. The curtain wall and skylight contractors shall develop a quality control

manual encompassing all aspects of the wall design, material procurement, factory fabrication and assembly and field installation. The form of the manual shall be reviewed and accepted by the Consultant and form the minimum acceptable level of quality for the project. This manual will document quality control practices of the Contractor, sub-contractors and major material suppliers. The manual will include, but not be limited to, specific criteria related to:

1.7.2.1. complete responsibility matrix identifying all roles and

responsibilities of QC team. 1.7.2.2. supplier identification and QC verification procedures. 1.7.2.3. component/element traceability procedures similar to ISO 9001. 1.7.2.4. details of material tagging process.

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1.7.2.5. copies of all inspection forms and checklists in English, where international standards are relied on equivalence to Canadian standards must be acceptably demonstrated.

1.7.2.6. details of material sampling and testing programmes to an acceptable statistical sampling procedure, minimum sampling of critical attributes to be 20%.

1.7.2.7. physical testing equipment, process and staff allocation, definition and storage of rejected material.

1.7.2.8. parameters for 100% glass review prior to glazing for dimensions, primary and secondary seal continuity and thickness, scratches, colour and surface condition; minimum 20%sampling for surface compression and argon fill at zero defects rate.

1.7.2.9. assembly review protocol. 1.7.2.10. procedures for response and rectification of issues noted in

Consultant shop and field review. 1.7.2.11. surface preparation and structural silicone sealant application in

strict accordance with sealant manufacturers procedures and ASTM C1401 , SSG bondline verification at minimum rate of 20% with zero defects.

1.7.2.12. sealant ratio (by volume and weight) and mixing check, tack time, set time, snake and butterfly tests.

1.7.2.13. paint adhesion testing, sealant adhesion testing, material compatibility testing.

1.7.2.14. assembly testing of frames in shop to include backpan watertightness and overall glazing assembly watertightness. Testing for air and water leakage in apparatus with calibrated water spray to ASTM Standards.

1.7.2.15. Packaging and shipping. 1.7.2.16. field installation including safety programme, method statement,

material storage and handling, deglazing procedure, hoist bay completion procedure.

1.7.2.17. close out QC documentation summary.

1.7.3. For all structural glazing applications, the skylight manufacturer/contractor is to maintain a logbook (copies to be provided to the Consultant and Owner at completion of fabrication) documenting date, time, results, and significance of all in plant testing carried out linked to daily panel production. The form of this logbook shall be reviewed and accepted by the Consultant.

1.8. Mock-Up

1.8.1. Preconstruction Mock-up:

1.8.1.1. Following contract award, proceed with the installation of a mock-up(s) as outlined in Section 01 34 00 Mock-Ups.

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1.8.2. Construction Installation Mock-up

1.8.2.1. The intent of the mock-up is to provide an opportunity to review site conditions, to make adjustments as necessary, to check anchoring and deflection requirements and verify that the installation is carried out in a manner satisfactory to Owners and Consultant. Mock-up to be complete and identical in every aspect and shall be representative of the work for the remainder of this project. The mock up will be used as a reference for the quality of the work to be expected for the duration of the work.

1.8.2.2. Mock-up shall be the installed by same installers who will perform the general installation.

1.8.2.3. Arrange for Consultant and Owner to be present during installation to view components which may become concealed as installation proceeds (ie. structural anchorage, perimeter insulation, etc.).

1.8.2.4. Final location of mock-up to be based on Drawings and determined on site.

1.9. Qualifications

1.9.1. Curtain wall/Skylight contractors shall be an approved applicator for the type

of curtain wall and/or skylight systems to be installed and have a minimum of 5 year experience in this line of work.

1.9.2. Perform welding of structural components only by fabricators certified by

Canadian Welding Bureau to CSA welding qualification codes; CSA Standard W47.1 for welding steel, CSA Standard W47.2 for welding aluminum.

1.9.3. Provide a project list completed by Curtain wall/Skylight contractors of similar

installation with references. The curtain wall and skylight systems shall be fabricated only by an approved dealer of the curtain wall and skylight manufacturers.

1.10. Quality Assurance - General

1.10.1. Consultant may visit manufacturer and/or fabricator’s facilities during

manufacturing and/or assembly of curtain wall/skylight systems for this project to examine assembly and materials. Any deviations noted from approved sample and from descriptions in laboratory test report for compliance with the project specification shall be corrected by the Contractor.

1.10.2. Consultant may undertake random on-site testing to verify that air and water

leakage resistance complies with required performance levels. If tests indicate failure, Contractor shall undertake remedial work and retesting necessary to demonstrate compliance with specified performance requirements, at no cost to the Owner. Testing shall be in accordance with the latest edition of AAMA 501.2 and AAMA 503.

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1.10.3. Site review of installation will be carried out by the Consultant and/or Owner. Provide a minimum of 24 hour notice to the Consultant and Owner for review of installation at key project milestone(s) before further proceeding with additional work. The milestones will be identified by Consultant after the mock-up.

1.11. Delivery, Storage, Handling and Protection

1.11.1. Keep handling on-site to a minimum. Exercise particular care to avoid

damage to finishes of materials. Deliver, store and handle work of this section in accordance with AAMA.

1.11.2. All components of the wall shall be identified after fabrication by marks clearly

indicating their location on the building as shown on the drawings. Packaging, if necessary, shall be the minimum necessary to protect the parts from damage during shipping and hoisting. Protect prefinished aluminum surfaces with wrapping. Do not use adhesive papers or sprayed coatings which bond when exposed to sunlight or weather.

1.11.3. Storage:

1.11.3.1. Store material in a location and in a manner to avoid damage.

Stacking shall be done in a way which will prevent bending, excessive pressure or abrasion of the finishes surfaces or so that water cannot accumulate on or within materials.

1.11.3.2. Store aluminum components and materials in a clean, dry location.

Cover with waterproof paper, tarpaulin or polyethylene sheeting in a manner that will permit circulation of air inside the covering.

1.11.4. Contractor to take all precautions necessary to protect materials, before and

after installation, from lime, mortar, water run-off from concrete or copper, careless handling of tools, weld splatter, acids, roofing tar, solvents, abrasive cleaners, and other items that could damage the glass surfaces and aluminum finishes. Do not rely on use of protective films to protect materials.

1.12. Warranty

1.12.1. Warrant the work of this Section (curtain wall and skylight systems) against

defects in materials and workmanship for a period of 5 years. Warrant that work will be water and weather tight, structurally sound and free from distortion and deformation under load; that materials and finishes will not develop excessive fading or non-uniformity of colour, and will not crack, peel, delaminate or otherwise deteriorate or corrode; that glazing splines, sealants and gaskets will be free from deterioration from sunlight, weather and oxidation, and will be free from permanent deformation under load.

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1.12.2. Warrant the insulating glass units (IGUs) against defects for period of 10 years. Warrant that the insulating glass units be free from material obstruction of vision as a result of dust or film formation on the internal glass surfaces by any cause, under normal conditions, other than extrinsic glass breakage, but including breakage due to thermal shock and temperature differential due to inherent glass or glazing faults. Warrant that the mechanical performance characteristics such as U value, solar heat gain and reflectivity shall remain consistent within the warranty period.

1.12.3. Warrant the spandrel glass against defects for period of 10 years. Warrant

that the spandrel glass shall be free from any visual defects by any cause other, than extrinsic glass breakage, but including breakage due to thermal shock and temperature differential due to inherent glass or glazing faults.

1.12.4. Warrant the laminated glass against defects for period of 10 years. Warrant

that the laminated glass shall be free from any delamination or visual defects by any cause, other than extrinsic glass breakage, but including breakage due to thermal shock and temperature differential due to inherent glass or glazing faults.

1.12.5. Warrant all structural silicone sealant work against defects for a period of 20

years. Warrant that the sealant shall remain free from failure, surface crazing or discolouration.

1.12.6. Warranties shall include the prompt remedy of defects upon written

notification from the Owner that defects exist. Remedy shall include labour, materials, equipment and services required to make good defective areas of the work, and in the case of factory-fabricated components, to supply and install new components, all at no cost to the Owner and at times convenient to the Owner. Warranties shall also include making good other building parts and finishes and other Owner’s property damaged or disturbed in the course of remedying defects.

1.12.7. Warranties shall commence on the date of Substantial Performance.

2. MATERIALS

2.1. Skylight System

2.1.1. Skylight system: vertical (rafter) and horizontal (purlin) stick members shall be

aluminium extrusions designed with internal drainage (drained and vented). Aluminum frame sections (all components, including pressure plates and cover caps) shall be from AA 6063-T6 alloy. System to be especially designed for retrofit application over existing framing.

2.1.1.1. Acceptable skylight systems are IBG Skylight Thin Veneer System or approved equivalent.

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2.1.1.2. Finish of cover caps and new frames to be 2-coat Duranar. Colour to be bronze to be match existing, with samples to be approved by Owner. Provide warranty of ten (10) years.

2.1.2. Purlins shall allow condensation from inner glass to discharge into an interior

condensation gutter on the rafters and drain to the sill for evaporation.

2.1.3. All joints shall be interlocking and be designed to be air and water tight. All mechanical joints shall be sealed with gunnable sealant compatible with structural silicone sealants and designed to prevent air and/or water infiltration. Provide expansion and/or stack joints as required and recommended by manufacturer.

2.1.4. Pressure plates and cover caps: conventional pressure plate and cover caps

at all vertical locations (rafters), against the steel members. All other locations, provide structural glazing sealant bead and exterior gunnable weather sealant.

2.1.5. Fasteners shall be 300 series stainless steel or 400 series stainless steel

cadmium plated and of sufficient size and quantity to perform their intended function.

2.1.6. The entire skylight system shall be based on the rain screen principle

(drained and vented). The system shall provide:

2.1.6.1. glazing pocket and spandrel cavity to be vented and drained to the exterior;

2.1.6.2. gaskets, corner blocks, baffles, overlaps and seals as required to provide a “rain screen” barrier to effectively deter rain entry into cavities of the system;

2.1.6.3. necessary air seals to minimize air passage from the system cavities into the building and vice versa, to assure adequate pressure moderation of the system cavities with the outside;

2.1.6.4. air and vapour seals required to minimize air/vapour exfiltration from the building into the system cavities and vice versa;

2.2. Operable Vents/Smoke Vents

2.2.1. Operable Vents/Smoke Vents to be structurally glazed (4 sided) to be incorporated in the skylight system with all required hardware for manual and automated operation such as Alumicor 5000 Series Phantom Vent (THOP) or approved equivalent. Colour to match new skylight frames.

2.3. Exterior and Interior Finishes

2.3.1. All aluminum components and associated trim exposed to view on the

exterior and on the interior shall be provided with finishes as selected by the

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Owner. Unless otherwise indicated, new components visible to view to match existing.

2.4. Isolation Coating

2.4.1. Surfaces of aluminum components in contact with concrete, masonry and

structural steel shall be coated with bituminous paint, conforming to CAN/CGSB-1.108-M, “Bituminous Solvent Type Paint”.

2.5. Wood Blocking and Shims

2.5.1. Wood blocking and strapping to be cedar. Wood treated with copper based

preservatives (ACA or CCA) shall not be used.

2.5.2. Shims shall hard plastic horseshoe shaped, tapered, sized for intended application.

2.6. Fasteners

2.6.1. All fasteners shall be suitably coated/formulated to prevent corrosion or

galvanic action.

2.6.2. Into Concrete Structure and Masonry Walls: Pre-drilled, self-tapping screws formed from carbon steel, 6mm (1/4") minimum diameter, length as required to provide minimum 25mm (1") embedment into concrete or masonry; use Tapcon by ITW Construction Products or Tapper by Powers Rawl.

2.6.3. Into Structural Steel: Pre-drilled, self-tapping screws formed from carbon

steel, 1/4" minimum diameter, length as required to provide minimum thread engagement in the steel as shown on approved shop drawings.

2.6.4. Into Wood: Minimum #8 wood screws, formed from stainless steel, length as

required to provide penetration into wood members as shown on approved shop drawings.

2.6.5. Into Aluminum Components: Self-drilling, self-tapping screws, minimum #6,

minimum length, as required to provide full penetration, pan head, formed from stainless steel; use Twin-Fast by Powers Rawl or Traxx by ITW Construction Products.

2.6.6. Screw fasteners shall be socket pan head or hex washer head type, except

where screws are installed through window frames (fixed and/or operable), or in sliding doors where flat head may be used provided they are properly countersunk.

2.6.7. Fasteners shall not be installed through the drainage plane of the glazing

system or sills unless approved by the Consultant. If fasteners at these

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locations are required and approved by the Consultant, wrap screw shanks with unshimmed butyl glazing tape.

2.7. Insulation

2.7.1. Polyurethane foam insulation: One component, non solvenated polyurethane

foam, conforming to CAN/CGSB-51.23 (latest edition), “Spray-Applied Rigid Polyurethane Cellular Plastic Thermal Insulation”. Use Enerfoam by Dow Chemical or approved equivalent.

2.7.2. Rigid Insulation: 50mm thick extruded high density foam insulation such as

Styrofoam SM by Dow.

2.8. Sealants

2.8.1. For structural glazing sealant application(slope glazing where indicated): 2 component silicone sealant such as Dow Corning 983 by Dow Corning Corporation, Proglaze II by Tremco Ltd., GE SSG 4600 UltraGlaze by Momentive Performance Products.

2.8.2. All other sealants: Conform to the requirements of Section 07 92 00, Joint Sealant.

2.9. Glass

2.9.1. Glass, Spandrel and insulating glass units (IGUs): conform to the

requirements of Section 08 80 00, Glazing.

2.10. Glazing

2.10.1. Exterior and Internal Glazing seals:

2.10.1.1. Between IGU and pressure plate: Slide in type profile, Silicone or silicone compatible extruded gasket, designed for glazing application, colour: Black.

2.10.1.2. Between rafter and purlin shoulder and IGU:

2.10.1.2.1. At pressure plate locations: Slide in type profile, Silicone or

silicone compatible extruded gasket, designed for glazing application, minimum thickness of 6mm. Black.

2.10.1.2.2. At all structural silicone glazing application, Silicone or high

density polyurethane foam suitable for SSG application such as Norseal V-2100 or V2200 by St-Gobain Performance Plastic (minimum 6mm thick).

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2.10.1.3. PVC and Santoprene type gaskets shall not be used in any of the applications.

2.10.1.4. Thickness of tapes and gaskets to be selected based on the

manufacturer specifications to provide the recommended compression necessary to ensure water tight seal of the curtain wall assembly.

2.10.2. Setting Blocks

2.10.2.1. Silicone or Silicone compatible, conforming to IGMA “Glazing

Recommendations for Sealed Insulating Glass Units”. Shore A durometer hardness shall be 85 ± 5. PVC or other types of setting blocks shall not be used. Minimum thickness of setting blocks is 6mm. Setting block profile to allow for drainage at purlins.

2.10.2.2. Follow section 5.0 of IGMA “Glazing Recommendations for Sealed

Insulating Glass Units” regarding setting block size, thickness, etc., shall be the minimum requirements of this Section. Unless otherwise stated, the minimum setting block length shall be 100mm.

2.11. Interfaces - Transition Membrane (curtain wall and skylight perimeters)

2.11.1. For application at the interface of the skylight and its perimeter, use one of

the following self-adhered products:

2.11.1.1. Monsey-Bakor; Blue Skin S.A. with Blueskin Primer 2.11.1.2. Grace Construction Products; Bituthene 3000 with P-3000 Primer 2.11.1.3. Soprema; Colphene Black with Colphene Primer

2.11.2. Termination sealant shall be compatible with membrane flashing and as

recommended by the membrane manufacturer. 2.11.3. Mechanically secure and seal the membrane into the glazing pocket of the

skylight or curtain wall systems. 2.11.4. Fastening bars: 18 Gauge galvanized sheet metal. Fastening bars shall be

continuous.

2.12. Perimeter Enclosure

2.12.1. Formed aluminum break shape (AA 1100-H14 alloy) or extruded aluminum profile to meet the intent of this specification, suitable for the application and to receive specified finish, 1mm thick (minimum) aluminum sheet. Shaped to engage into glazing pocket and wide enough to provide adequate surface to create a drip edge and a surface for sealing between the sill flashing and the building surface. The exposed portion of the flashing shall be folded with a minimum 12mm return.

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2.12.2. Architectural Metal (infill panel above skylight/roof parapet): 2mm thick (minimum) aluminum sheet, architecture utility grade suitable to receive paint finish, edge of panels to be flush and smooth. Pre-finishes to match skylight exterior finish, mill finish at faces not exposed to view. Metal panels shall be sized to fit within the existing opening and provide a minimum of 3mm edge clearance. Formed aluminum break shape (AA 1100-H14 alloy) or extruded aluminum profile to meet the intent of this specification and suitable for the application, 1.5mm minimum thickness. Apply exterior finish after bending.

2.12.3. Curb detail

2.12.3.1. Roof membrane assembly per Section 07 55 57 Elastomeric Roofing.

2.12.3.2. Metal flashing/Metal closure

2.12.3.2.1. Metal flashing and closure shall be prefinished aluminum sheet

conforming to CSA-A440, latest edition, and additionally as follows: minimum 0.80mm (0.032") thick sheet to match existing skylight frame as closely as possible.

2.12.3.3. Rigid Insulation: 50mm thick extruded high density foam insulation

such as Styrofoam SM by Dow Corning. 3. EXECUTION

3.1. Fabrication (in plant)

3.1.1. Fabricate system components with minimum clearances and shim spacing around perimeter of assembly, yet enabling installation and dynamic movement of perimeter seal.

3.1.2. The glazing systems shall be sized to fit within existing openings, without

damaging interior finishes.

3.1.3. Provide individual compartments within the glazing systems in accordance with the rain screen principle.

3.1.3.1. For the skylight system, all purlins shall be sealed to rafters. 3.1.3.2. For the curtain wall system, all rails shall be sealed to mullions.

3.1.4. All joints shall be accurately machined, assembled and sealed to provide neat

weathertight joint.

3.1.5. For the skylight system (including operable vents) using structural silicone sealant, proceed with the installation of the insulating glass units in plant using two part silicone sealant. Structurally glazed all IGUs and spandrel glass panels according to silicone sealant manufacturer within the cassette

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system from veneer skylight system. Follow the recommended procedures from the silicone sealant manufacturer and industry standards.

3.1.6. Prepare components to receive anchor devices. Install anchors.

3.1.7. Arrange fasteners and attachments to ensure concealment from view.

3.1.8. Welding requirements (for new steel framing, if required):

3.1.8.1. All welding shall be done with electrodes and/or by methods

recommended by the suppliers of the metals being welded. Type, size and spacing of welds shall be as shown on approved shop drawings.

3.1.8.2. Welds behind finished surfaces shall be so done as to minimize distortion and/or discolouration on finished side. Weld spatter and welding oxides on finished surfaces shall be removed dy descaling and/or grinding.

3.1.8.3. All surfaces adjacent to weld area should be protected from weld spatter.

3.2. Site Preparation

3.1.1. Before beginning installation in any assigned area, the contractor shall

examine all parts of the structure affecting installation of his work in this area. Should any errors be found in the location of offset lines or bench marks, and should any condition be found in the structure which, in his opinion, will prevent proper execution of his work, he shall report such errors and conditions in writing to the Consultant. Installation shall not proceed in the area until errors and unsatisfactory conditions have been corrected or adjusted.

3.1.2. As outlined in the scope of work, remove and dispose of existing curtain wall

and skylight assemblies (glass, frames, and flashings) and all associated perimeter seals. Take all precautions required to prevent debris falling below.

3.1.3. Remove debris from outside the building. General access for demolition will

not be permitted inside building.

3.2.1. Take care to limit damage to sound interior finishes and exterior cladding. Damage to sound interior finishes and exterior cladding shall be repaired by the Contractor at no cost to the Owner

. 3.3. Curtain wall and skylight framing Installation and securement

3.3.1. Verify dimensions, tolerances, and methods of attachment with other work.

3.3.2. Verify wall openings and adjoining air barrier and vapour retarder materials are ready to receive work of this section.

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3.3.3. Install new curtain wall and skylight systems in accordance with the

manufacturer's instructions and approved shop drawings.

3.3.3.1. Install glazing framing members at their correct locations with frames plumb and at proper elevation, true, level, with frames square, free from warp, twist and superimposed loads, and in alignment with other work.

3.3.3.2. Attach to existing structure to permit sufficient adjustment to accommodate construction tolerances and other irregularities. Secure work adequately and accurately to structure in required position, in manner not restricting thermal movement. Finalize anchor setting after alignment. Structural anchors shall utilize the three way adjustment and be welded after skylight alignment.

3.3.3.3. Isolate aluminum from concrete, mortar, plaster and dissimilar metals with bituminous paint.

3.3.3.4. For the skylight system, install the pre-glazed/structurally glazed unitized “cassette” system and use the toggle switches to lock the panels in place. Follow the skylight manufacturer instructions for securing and sealing the unitized panel to the main skylight frame.

3.3.3.5. Proceed with the installation of the perimeter seals.

3.4. Perimeter (head and sill) of skylight

3.4.1. For the Roof Parapet to top (head) of skylight:

3.4.1.1. Remove the existing roof parapet flashing and dispose of. 3.4.1.2. Access the top of the existing skylight system. Cut top of rafter

vertical screw chase flush with horizontal screw chase to offer a continuous surface for the installation of the waterproofing membrane.

3.4.1.3. After cleaning area, install polyurethane foam in opening between the concrete opening and the top/sides of the skylight. Install a plug of foam in the back section of each rafter.

3.4.1.4. Mechanically secure membrane into glazing pocket and extent upward onto the slope surface of the roof for about 200mm.

3.4.1.5. Tie-in membrane with roof membrane assembly for continuous waterproofing per details.

3.4.1.6. If required, provide, secure and shim as required a new pressure treated wood (to match existing) on top of existing parapet (wide enough to match existing). The purpose would be to improve the slope towards the roof.

3.4.2. Sill of Skylight to roofing curb

3.4.2.1. Access the bottom of the skylight/roof curb. 3.4.2.2. Install a new peel and stick membrane from the sloped

glazing/skylight to glazing pocket to the top of the roof curb surface

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(provide a minimum of 50mm overlap). Seal the membrane into the glazing pocket and mechanically secure using a fastening bar.

3.4.3. Proceed with the installation of all metal flashing, enclosures and architectural

metal as per the approved shop drawings.

3.5. IGU Installation (for new curtain wall system)

3.5.1. Preparation

3.5.1.1. Remove all protective coatings. Verify that all surfaces to receive glazing, including glass edges, are prepared in accordance with manufacturer’s recommendations. Protect all cleaned surfaces. Reclean any contaminated surfaces. Do not clean surfaces that cannot be glazed within two hours.

3.5.1.2. Place each setting block at quarter points but no closer than 150mm (6") from the corners of IGU. Both IGU glass panes shall be fully supported by setting blocks.

3.5.1.3. Ensure that setting blocks do not interfere with glazing pocket drainage.

3.5.1.4. At pressure plate locations, do not stretch gasket during installation. Cut gasket about 12mm longer than pressure plate. Allow gasket to relax for a minimum of 24 hours. Prior to glazing, cut gasket about 1.5mm longer than size of opening and crowd gasket. Trim or otherwise adjust so as to accommodate frame joint seals.

3.5.1.5. Locate IGU within opening to provide minimum edge and face clearances as recommended by IGMA. Install temporary retainers as required to secure the IGUs in place.

3.5.2. Installation of Pressure Plates/Cover Caps:

3.5.2.1. Remove temporarily retainers. Install glazing tape. Remove

protective paper. Install pressure plates with new fasteners. Once the pressure plates are installed, the top of the glazing tape should be paralleled with edges of the pressure plate (i.e. no depression).

3.5.2.2. Seal all butt joints at pressure plates. Install cover caps. Verify that sufficient allowance is provided for thermal movement of cover caps

3.5.2.3. Install a full perimeter silicone cap bead at all openings, including sealing of all of the metal to metal joinery.

3.6. Exterior Perimeter Sealing

3.6.1. Install Interior and exterior perimeter sealants in accordance with Section 07

92 00, Joint Sealant.

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3.7. Protection, Cleaning and Adjustment

3.7.1. All components of the curtain wall shall be protected from other building materials during and after installation until acceptance by the Consultant and Owner. Protect finished work from damage.

3.7.2. Remove protective elements and labels from glass and thoroughly clean

aluminum and glass surfaces with solution of mild domestic detergent in warm water. Take care in removing dirt from corners. Wipe surfaces dry using soft cloths. Glass to be cleaned according to GANA Informational Bulletin GAA 01-0300, Proper Procedures for Cleaning Architectural Glass Products.

3.7.3. Remove excess sealant by moderate use of solvent acceptable to sealant

and curtain wall manufacturer.

3.7.4. Check ease of operation of operable vents/smoke vents. Make adjustments as necessary. Prior to removal of any existing glass unit, examine all conditions, including environmental conditions, likely to affect the timely completion of the work of this section

End of Section 08 54 00

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MORRISON HERSFIELD LIMITED SECTION 08 93 00 5100 YONGE STREET – ROOF AND GLAZING REPLACEMENT OCTOBER 2016 CURTAIN WALL REHABILITATION – REVISON 1 PAGE 1 of 8

GENERAL

1.1. Description

1.1.1. This section specifies the materials and methods for the rehabilitation of the curtain wall system (vision and spandrel panels), and its interface with the roof parapet/slope glazing, miscellaneous building cladding and at the ground floor level, including the replacement of insulating glass units (IGUs) and spandrel panels The work includes but is not limited to the following: 1.1.1.1. At north and south elevations, remove and replace all cover caps

and pressure plates. Replaced failed IGUs as per scope of work. 1.1.1.2. At areas indicated on AS.00 Window Schedule, remove and

replace all cover caps, pressure plates and 100% glazing (existing curtain wall frame to remain).

1.2. Related Work

1.2.1. Section 07 92 00 – Joint Sealant 1.2.2. Section 08 80 00 – Glazing

1.3. Environmental Conditions

1.3.1. Work shall not proceed if weather at time of installation, or immediately forecast, may result in damage to exposed wall elements or interior finishes and furnishings of building.

1.3.2. Comply with the requirements in Section 07 92 00 during application of sealants.

1.4. Mock-Ups

1.4.1. Prior to the commencing with the repairs, perform mock-up repairs at locations chosen by the Consultant. The repairs shall be performed to the acceptance of the Consultant and replicated to the same standards throughout the repair program.

1.5. Site Review and Testing

1.5.1. Contractor shall visit the site prior to bidding to examine and determine the conditions under which the work will be performed.

1.5.2. Notify Consultant and Owners for review of curtain wall repairs including but not limited: 1.5.2.1. to perimeter caulking (inner and outer seals); 1.5.2.2. sealing of metal back-pans where possible; 1.5.2.3. sealing of open ends of mullions; 1.5.2.4. replacement of glass; 1.5.2.5. improvement to drainage; 1.5.2.6. sealing of curtain wall mechanical joints; 1.5.2.7. sealing of curtain wall junctions/interfaces.

1.5.3. Do not proceed with the installation of the wall components until inspections have been carried out and work has been approved.

1.5.4. Provide a minimum of 48 hours notice to the Consultant for site reviews. 1.5.5. At the Owner’s option, Consultant may undertake random on-site testing for

quality control. Provide assistance by providing one labourer to assist with

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testing and access of curtain wall via ladder and/or scaffold. Provide assistance to perform the following: 1.5.5.1. Random testing of fasteners to confirm securement of pressure

plates. 1.5.5.2. On-site water testing to check for leakage following repairs. 1.5.5.3. Labour and equipment costs shall be paid for on an hourly basis

from the testing and inspection allowance.

1.6. Storage and Handling 1.6.1. Handle curtain wall components in general accordance with AAMA CW-10,

"Curtain Wall Manual #10 - Care and Handling of Architecture Aluminum From Shop to Site".

1.7. Submittals

1.7.1. Prior to starting work, the Contractor shall submit: 1.7.1.1. A list of all materials to be provided under this section. 1.7.1.2. Manufacturer’s product data and specifications for each material.

1.8. Warranty

1.8.1. At no cost to the Owner, correct leakage through the exterior wall assembly which occurs as a result of defects in material and workmanship as determined by the Consultant.

1.8.2. Warranty Period: 2 years (unless indicated otherwise) 2. MATERIALS

2.1. Curtain Wall Materials 2.1.1. Pocket Filler

2.1.1.1. At all locations (perimeter adjacent to other cladding, at spandrel panel), provide new extruded PVC pocket filler. New pocket filler shall be sized to fill the glazing pocket and provide continuous support to the pressure plate once assembled.

2.1.2. Corner Blocks

2.1.2.1. Provide new corner blocks made from extruded EPDM rubber at all locations. New corner blocks to have a Shore A hardness of 50± 10 and to be shaped and sized to suit the required locations.

2.1.3. Glazing Tapes and Gaskets

2.1.3.1. Provide new rubber gaskets extruded from EPDM rubber. PVC and Santoprene gaskets shall not be used.

2.1.3.2. Thickness of glazing tapes and gaskets shall be selected to achieve necessary compression to ensure water-tight seal. Once the system is fully assembled, the minimum face clearances (interior and exterior) shall be 3mm (1/8”). The interior clearance is defined as the horizontal gap between the inner IGU surface and the

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mullion, the exterior clearance is the horizontal gap between the outer IG unit surface and the pressure plate/cover cap.

2.1.4. Setting Blocks

2.1.4.1. Where intact, reuse the existing setting blocks. Where missing or deteriorated, provide new setting blocks made from extruded EPDM rubber, conforming to IGMA “Glazing Recommendations for Sealed Insulating Glass Units”.

2.1.4.2. New setting blocks to have a Shore A hardness of 85± 5 and to be shaped and sized to suit the location where it is to be installed. Minimum thickness of setting blocks is 6mm (1/4”). Minimum setting block length shall be 100mm (4”).

2.1.5. Pressure Plates/Cover Caps:

2.1.5.1. Provide new pressure plates extruded from mill finish architectural grade aluminum. New pressure plates shall be compatible with the new cover caps.

2.1.5.2. Provide new cover caps extruded from architectural grade aluminum suitable to be used in curtain wall assembly, be compatible with new pressure plates and prefinished to match the appearance and performance of existing.

2.1.5.3. Finish of cover caps and new frames to be 2-coat Duranar. Colour to be bronze to be match existing, with samples to be approved by Owner. Provide warranty of ten (10) years.

2.1.6. Thermal Break (between curtain wall screw chase and pressure plates)

2.1.6.1. Provide new thermal break, conforming to IGMA “Glazing Recommendations for Sealed Insulating Glass Units”. The new thermal break shall fit the existing race in aluminum mullion/rail screw chase and maintain a constant separation of each component once the system is fully assembled.

2.1.7. Pressure Plate Fasteners

2.1.7.1. Where removed to access the work area, replace all fasteners with new fasteners (fabricated from 300 series stainless steel) of sufficient size to match existing and quantity to perform their intended functions. These are known as ¼-20; ¼” in diameter, 20 threads per inch and are usually ¾” to 1” long.

2.1.7.2. The drive of the fastener shall be Robertson type socket. Each fastener should be torqued to approximately 75 - 85 in-lbs or as determined by site conditions. Fasteners shall not prevent the installation of cover cap.

2.2. Insulation

2.2.1. Spandrel Panel Cavity 2.2.1.1. Where intact, reuse the existing spandrel panel insulation. Where

deteriorated or damaged, provide new semi-rigid insulation boards to match existing such as AF530 by Owens Corning Canada Inc.,

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OFI-48 by Ottawa Fibre Inc., or other approved manufacturer, thickness to fill the full depth of the galvanized metal back pan.

2.2.1.2. Insulation securement (if required): Corrosion resistant steel pin with friction fit retainer with perforated base for adhering to existing metal back-pan. Mechanically secured stick pins shall not be used.

2.2.1.3. Extruded Rigid Insulation such as curtain wall/roof parapet interface 2.2.1.3.1. Type IV or Type III close cell extruded polystyrene with a

minimum compressive strength of 170kPa, such as Dow Styrofoam CavityMate or approved equal.

2.2.1.3.2. Adhesive for insulation conforming to CGSB 71-GP-24M, compatible with polystyrene insulation.

2.2.2. Polyurethane Foam Insulation 2.2.2.1. One component, non-solvenated, conforming to CAN/CGSB-51.23-

92, “Spray-Applied Rigid Polyurethane Cellular Plastic Thermal Insulation”, such as Enerfoam by Abisko Manufacturing Inc., or approved equal.

2.3. Metal flashing, Membrane Flashing and Fastening Strips

2.3.1. Metal flashing 2.3.1.1. Supply and install new 18 gauge painted aluminum sized to meet

project requirements. Colour to match caps and frames. 2.3.2. Membrane flashing

2.3.2.1. For application at the interface of the curtain wall and roof parapet, curtain wall and concrete curb, curtain wall and at masonry interface (if required), use one of the following products: Monsey-Bakor; Blue Skin S.A. with Blueskin Primer Grace Construction Products; Bituthene 3000 with P-3000 Primer Soprema; Colphene Black with Colphene Primer

2.3.2.2. Fastening bar: 20 gauge galvanized sheet metal. Fastening bar shall be continuous.

2.3.2.3. Fasteners shall be corrosion resistant, self drilling, self tapping screw, #6 x ½", installed every 600mm on centre along the flashing. The drive of the fastener shall be robertson type socket.

2.3.2.4. Termination sealant shall be compatible with membrane flashing and as recommended by the membrane manufacturer.

2.4. Architectural Metal

The items under this section shall match the colour of aluminum caps. 2.4.1. Metal Spandrels (infill):

2.4.1.1. 3mm (1/8”) thick (minimum) aluminum sheet, architecture utility grade suitable to receive 2-coat Duranar paint finish, edge of panels to be flush and smooth. Pre-finishes to match curtain wall exterior finish, mill finish at faces not exposed to view. Metal panels shall be sized to fit within the existing opening and provide a minimum of 3mm edge clearance.

2.4.2. Sill flashing (at curtain wall/ground floor/cladding) 2.4.2.1. 1mm (0.040”) thick (minimum), aluminum sheet, architectural grade

suitable to receive paint finish, shaped with upstand to engage into glazing pocket and wide enough to provide adequate surface to

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create a drip edge and a surface for sealing between the sill flashing and the building surface. The exposed portion of the flashing shall be folded with 12mm (1/2”) return.

3. EXECUTION

3.1. General 3.1.1. Verify dimensions, tolerances, and methods of attachment with other work. 3.1.2. Be responsible for any damage caused or clean-up required by dispersion of

the different components of the curtain wall system, etc., generated by the work.

3.1.3. Remove exterior face sealants as required to access the work area.

3.2. Curtain Wall Disassembly 3.2.1. Proceed with the repairs on the areas as outlined in the scope of work. 3.2.2. Remove wall components as required to access the work area. 3.2.3. Install temporary retainers (i.e. Dutchman) in sufficient number to capture all

remaining glazing units during the duration of this work. 3.2.4. Remove cover caps and pressure plates and temporarily secure insulating

glass units/glazing. 3.2.5. At curtain wall areas, where glazing is to remain, inspect insulating glass

units/glazing for damage. If any of the glass products are found damaged within curtain wall opening prior to handling by Contractor, contact Owner’s Representative immediately for instructions. 3.2.5.1. Neatly cut and remove the corner sections of insulation to expose

the four corners of the back-pan at spandrel. Set aside the insulation for re-installation after repair. Dispose of any significantly damaged insulation where directed by the Owner’s Representative.

3.2.5.2. Verify the condition of the seals at each corner. If doubtful, remove, prepare surface and install new sealant as per Section 07 92 0. Re-install insulation and secure in place.

3.2.6. Remove the corner plug to expose the curtain wall mechanical connections (butt joints) at each corner of the spandrel and vision openings in the work area and retain for later re-instatement. Replace with new material as specified in item 2.1.2 of this section.

3.2.7. Remove all sealants, clean all concealed joints within the work area (including the glazing pocket) and re-install new sealants in accordance with Section 07 92 00 – Joint Sealant at all locations under the scope of work. When not specified, the sealant bead shall have a minimum diameter of 6mm when gunned, prior to tooling. The work includes, but is not limited to: 3.2.7.1. Sealing joints between metal back-pan and aluminum curtain wall

mullion (perimeter of back pan to mullion and all screw heads); 3.2.7.2. Sealing penetrations through metal back-pan, corners, metal infill

panel in between vision and spandrel, and aluminum mullion (if any);

3.2.7.3. Sealing expansion joint and all associated components; 3.2.7.4. Sealing mechanical joints, screw heads and gasket race at corner of

curtain wall opening;

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3.2.7.5. Sealing mechanical joints behind corner blocks; 3.2.7.6. New corner toe beads at each head/jamb and sill/jamb locations of

the glazing units (when required); 3.2.7.7. Sealing corner block at each vertical/horizontal transition; 3.2.7.8. Sealing butt joints in pressure plates prior to installation of cover

caps. 3.2.8. Corner Plug Installation

3.2.8.1. Install corner toe bead 50mm (2”) up in each direction at corners of all remaining IGUs at vision areas.

3.2.8.2. Seal the mechanical joint between the railing and mullion with a bead of sealant (6mm x 6mm). Install a bead of sealant (6mm x 6mm) at the back and sides of corner plugs. Insert freshly buttered corner plugs in between the vertical mullion and horizontal rail of curtain wall assembly.

3.2.8.3. Complete the installation by “buttering“ the entire top surface of the corner block, and marrying with the corner toe bead, thermal break and surrounding wall components. Tool sealant has to maintain the vertical glazing pocket drainage path. Once the installation of the corner plug is completed, it shall be flush with the vertical face of the thermal break. Once installed, the back side of the pressure plate must be in contact with the vertical front face of the corner plug.

3.2.8.4. After the repairs have been completed, contact Owner’s Representative for inspection prior to the installation of insulating glass units.

3.3. Drainage Improvements

3.3.1. Prior to installation of pressure plates and cover caps, the drainage path for each opening must be verified and corrected if required.

3.3.2. At spandrel locations, a spandrel panel adaptor is used to locate the spandrel glass panel within the opening. Generally, drain holes are blocked and the flow at each end of the adaptor is restricted. Cut pocket filler about 12mm (1/2”) shorter at each end. At all locations, modify pressure plates as follows: 3.3.2.1. Clean and enlarge existing drain holes to a minimum 6mm x 25mm

(1/4” x 1”). 3.3.2.2. Install new drain holes where missing (generally in the middle).

There should be 3 drain holes per spandrel adaptor. 3.3.2.3. At each end of the adaptor, cut away about ½" of the adaptor to

allow unrestricted water flow. 3.3.3. At the pressure plates, there are generally two, 1/4" weep holes at the

corners and no weep holes at the center. 3.3.3.1. Clean and enlarge existing weep holes of pressure plate to a

minimum 6mm x 25mm (1/4” x 1”). 3.3.3.2. Verify that weep holes are free from obstruction. If weep holes are

blocked by thermal break (weep holes too low) or by setting blocks, relocate weep hole.

3.3.3.3. Install new weep holes where missing. There should be 3 weep holes per horizontal pressure plate. The weep holes shall be located between the setting blocks and the horizontal rail/vertical mullion at the corners, and at mid-span between the two setting

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blocks at the sill. The bottom of each weep hole should be flush with the top of the thermal break/screw chase.

3.3.4. At locations where a clear drainage path between the vertical and horizontal glazing pocket can not be maintained, ensure that all joints at the corner are sealed and provide new weep holes (3/16" ø x ½") in the vertical pressure plate, immediately above the corner plug location.

3.3.5. There are generally two drain holes in sill cover cap undersides. If required for drainage, drill 2 x 6mm (1/4”) ø drain holes in underside of horizontal sill cover caps. Offset the location of the new drain holes in relation to the pressure plate weep holes (minimum offset of 300mm (12”).

3.4. Curtain Wall Re-Assembly

3.4.1. Install glass and/or metal spandrel panels back into respective openings. 3.4.1.1. Clean outside and interior faces of glazing unit with clean white cloth

saturated with solvent. If required, install interior glazing seal and corner toe bead at all locations within the repair area. If required, install setting blocks at 1/4 points. If required, remove temporary retainers.

3.4.1.2. Set glazing unit in place and press firmly against the interior glazing seal. Locate glazing unit within opening to provide minimum edge and face clearances as recommended by IGMA.

3.4.1.3. Verify that vertical to horizontal glazing pocket drainage is not impeded at the corners.

3.4.2. Curtain wall/Lower Roof Interface

3.4.2.1. Access the bottom of the curtain wall/lower roof canopy above the unit entrance. Remove cover cap, pressure plate and sill flashing. Remove foam pocket filler.

3.4.2.2. After cleaning area, install polyurethane foam in opening between the bottom of the curtain wall horizontal member and the top of the existing roof.

3.4.2.3. Install a new peel and stick membrane from the curtain wall glazing pocket to the top of the new roof membrane (provide a minimum of 50 (2”) mm overlap onto roof membrane). Seal the membrane into the glazing pocket and mechanically secure using a fastening bar. Provide a sealant end dam at any vertical locations to prevent uncontrolled water drainage.

3.4.2.4. Proceed with the internal seals and drainage upgrade as outlined in this section.

3.4.3. Transition\Corner Treatment

3.4.3.1. Remove cover caps and pressure plates, provide temporary retainers, remove exterior metal panel and insulation to expose the interior seals.

3.4.3.2. Reseal the existing interior metal flashing to the curtain wall members. Install new horizontal flashing membrane at the top and/or bottom of each opening and seal against curtain wall members. Overlap onto existing membrane as per membrane

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manufacturer. Provide slope towards the exterior to provide drainage.

3.4.3.3. Re-install insulation provide new insulation and exterior metal cladding. Fasten the top of the metal cladding to curtain wall member to prevent slippage. If damaged - provide new architectural metal to close up the corners.

3.4.3.4. Proceed with the installation of pressure plates/cover caps as required

3.4.4. Proceed with the installation of pressure plates/cover caps.

3.4.4.1. Verify the clearance (gap) between horizontal and vertical pressure plates. If clearance at vertical pressure plates are less than 3mm (1/8”) at each end, cut pressure plate and re-install.

3.4.4.2. Supply and install new rubber gasket on pressure plate race/face. Cut flush with edge of pressure plate. Do not stretch glazing seal during installation.

3.4.4.3. Remove temporary retainers and install new pressure plates and fasteners. Once installed, the glazing seal should be flush with pressure plate edges (i.e. there should not be depressions in the seal which allow water pounding). Seal all pressure plate butt joints. Install cover caps.

3.4.4.4. Verify that sufficient allowance is provided for thermal movement of cover caps. Verify the clearance (gap) between horizontal and vertical cover caps. If clearance between the two pressure plates is less than 3mm (1/8”) at each end, cut cover cap to provide a 3mm (1/8”) gap at each end and re-install.

3.5. Re-install all disturbed interior/exterior seals in accordance with Section 07 92 00 –

Joint Sealant.

3.6. Cleaning 3.6.1. Thoroughly clean aluminum and glass surfaces with solution of mild domestic

detergent in warm water. Exercise care in removing dirt from corners. Wipe surfaces dry using soft cloths.

End of Section 08 93 00

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