james city county

WILLIAMSBURG/JAMES CITY COUNTY PUBLIC SCHOOLS INVITATION FOR BIDS 13-5625

JAMES RIVER ELEMENTARY SCHOOL HVAC SYSTEM REPLACEMENT

DATE: March 20, 2013 ADDENDUM NO. 1 This Addendum answers bidder questions, Plan Holders List, School Calendar, Certification of Compliance-Code of Virginia 22.1-2961 Form and includes Pre-Bid Conference sign-in sheet from Pre-bid on March 14, 2013. The following modifications, additions, or deletions hereby incorporated into the contract documents. CLARIFICATION: Per the Invitation for Bids 13-5650 page 4: paragraph 3 of the bid document potential bidders shall obtain bid documents from the James City County Purchasing Office. If bid documents are not purchased through the Purchasing Office bid submittals will be rejected.

The Bid Documents shall be obtained from James City County Purchasing office for a Non-refundable cost of $120.00. Checks for the Bid documents shall be made payable to Williamsburg-James City County Public Schools. You may request that the Purchasing Office mail your firm a set by providing your UPS account number or a separate check for $10.00 made payable to Treasurer of James City County. Neither the Owner nor any of its representatives shall be responsible for full or partial sets of Bid Documents, including addenda, obtained from any other source. The Bid Documents, except the Bid Form which must be submitted in duplicate with each bid, shall NOT be duplicated. Amended/Clarification/Modifications: Question: Is there a form included in the bid to sign for certification of employee criminal and background certification? Response: The Contractor shall complete and submit the Certificate of Compliance-Code of Virginia 22.1-296.1 Form. Contractor is required to update this certification if there are any changes in employee circumstances. A copy of the form is included at the end of this section. Invitation For Bids Section 23.5 Liquidated Damages, paragraph 4: CHANGE liquidated damages amount from $500.00 per calendar day to $750.00 per calendar day.

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SPECIFICATIONS

Section 01500 – Temporary Facilities and Protection of Property

1. Paragraph 1.9.D CHANGE the fourth sentence to read as follows: “The contractor shall protect this material by covering with 6-mil………..”

Section 06100 - Rough Carpentry

2. This specification section is hereby revised in its entirety.

Section 07840 – Penetration Firestopping

1. Subparagraph 1.2.B.1 CHANGE “078446” to read “07841”.

Section 07841 – Fire-Resistive Joint Systems

1. Subparagraph 1.2.B.1 CHANGE “078413” to read “07840”. 2. Subparagraph 1.2.B.2 DELETE in its entirety.

Section 07920 – Sealants and Caulking

1. Subparagraph 1.2.B.1 CHANGE to read: Section 07840 "Penetration Firestopping" for penetrations in fire-resistance rated walls, horizontal assemblies, and smoke barriers.

2. Subparagraph 1.2.B.2 CHANGE to read: Section 07841 "Fire-Resistive Joint Systems" for joints in or between fire-resistance-rated construction, at exterior curtain-wall/floor intersections, and in smoke barriers.

3. Subparagraph 1.2.B.3 DELETE in its entirety.

Section 09290 – Gypsum Board

1. Subparagraph 1.2.B.1 CHANGE to read: Section 09220 "Non-Structural Metal Framing" for non-structural framing and suspension systems that support gypsum board panels.

Section 15010 - Mechanical General Provisions

1. Paragraph 1.10.E CHANGE in the fourth sentence the changing of filter requirement from bi-weekly to bi-monthly….

2. Paragraph 3.10.C ADD “Domestic Cold and Cold Water Make-Up – Safety Green (SW-4085).

Section 15250 - Mechanical Insulation

1. Paragraph 2.3 and 3.3.B CLARIFICATION All ductwork inside of mechanical rooms and mechanical mezzanines shall be insulated with 2” thickness rigid board. All ductwork located in the unconditioned attic shall be insulated with 3” thickness blanket. Concealed ductwork above ceilings shall be insulated with 2” thickness blanket.

2. Paragraph 3.2.A Replace “Refrigerant Piping:” with the below for VRF system refrigerant piping insulation.

Refrigerant Piping (drawn temper “hard” pipe): 1" thickness flexible unicellular for pipe sizes up to 1-1/2" and 1-1/2" thickness for pipe size over 1-1/2".

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Refrigerant Piping (annealed “soft” tubing): 1/2" thickness flexible unicellular field installed or ½” thickness pre-insulated pipe with polyethylene foam.

Section 15800 - Heating Ventilating and Air Conditioning

1. Paragraph 2.2.B.1.b ADD: Since TRANE does not make a scroll compressor air cooled chiller in the tonnage range specified, TRANE may provide a rotary screw compressor air cooled chiller (MODEL RTAC155, high efficiency, EER 10.4 @ AHRI certified, IPLV 14.5). The screw compressor chiller must meet all performance data specified including but not limited to power, efficiency, capacity, sound, size, and controls.

2. Paragraph 1.5 ADD the following paragraph. 1.5. CONTRACTOR QUALIFICATIONS A. The Contractor’s personnel installing the VRF systems must be certified by the manufacturer of the system as specified in this paragraph. Proof of certification of the installer working on site must be provided before any work can be performed on the VRF systems. Personnel not certified are not allowed to participate in the installation of this system. B. The Contractor must have completed a minimum of one fully functioning variable refrigerant flow (VRF or VRV) system of similar size and capacity. The Contractor shall demonstrate they have the staffing and experience necessary to complete this HVAC work within the time specified by providing project descriptions for the VRF project and for similar HVAC replacement projects. These descriptions shall include a brief outline of the project scope: the start and completion dates: the HVAC bid price: and staffing utilized on each project.

3. Paragraph 2.2.B.5.a.(4) DELETE the requirement for chiller spring vibration isolators. Provide rubber isolators as recommended by the manufacture.

4. Paragraph 2.3.B.2 ADD the following sentence to the Kitchen Hood Exhaust Fan description. “The fan shall be UL 762 listed for grease removal.”

5. Paragraph 2.4.A.4 ADD the following to this paragraph: “Provide on the entering side of each single port branch selector box, full port isolation ball valves with Schrader port on each refrigerant pipe to allow servicing of branch selector box and fan coil units connected to the branch selector box. Provide on the leaving side of each multi-port branch selector box, full port isolation ball valves with Schrader port on each refrigerant pipe to allow servicing of each fan coil unit connected to the branch selector box. Isolation ball valves shall be manufactured by “Sherwood – Superior Series WAS Ball Valves.” Valves shall be rated for -40°F to 300°F operating range and 700 psig, rated for 410a refrigerant, rated for oil (PVE), factory installed Schrader port and manually operated.”

6. Paragraph 2.5.A.1 ADD International Environmental Corporation (IEC) as an acceptable (equal) fan

coil unit manufacturer.

7. Paragraph: 2.5.C CHANGE Section title to read as follows: C. CIRCULATING PUMPS.

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8. Paragraph 2.5.C.1 and 2.5.C.3.a.(1) ADD ARMSTRONG PUMPS as an acceptable (equal) pump manufacturer.

9. Paragraph 2.5.C.3.a.(13) through (16). CLARIFICATION These paragraphs apply to all circulating pumps.

10. Paragraph: 2.6.A.9 DELETE this paragraph.

11. Paragraph 2.6.C.1 CHANGE "VILO” to “WILO”.

12. Paragraph 2.5.G.1 CHANGE Series “B-LA” to Series “B”.

13. Paragraph 2.7.C.1 DELETE “No substitutions” and replace with “or approved equal:.

14. Paragraph 2.8 DELETE (Not Used) ADD the following: 2.8.A Vibration Isolators: 1. Mechanical equipment indicated below shall be isolated from the structure

by resilient vibration and noise isolations. Equipment to be isolated includes, but is not limited to, the following: Horizontal cabinet unit heaters, fan coil units, and inline exhaust fans. Deflection for hangers and supports shall be in no case greater than 1-1/2" nor less than 1/4". Minimum deflection shall be 1”.

15. Paragraph 2.9.A.2 ADD “d. Exhaust Fan EF-7 (Serving Locker Rooms).

Section 15900 - Automatic Temperature Controls

1. Paragraph 4.3.a.1 ADD “c. or from a call for heating (reheat)”

2. Paragraph 4.3.a.3 ADD “c. or when the loop temperature drops below 80°F (adj.).”

3. Paragraph 4.6.a.1 CHANGE paragraph b. to read as follows: “ b. on a call for cooling in the unoccupied or occupied mode.”

4. Paragraph 4.11.A through H and 4.12.A through H DELETE references to outside air damper.

5. Paragraph 4.12.A CHANGE paragraph to read as follows:

A. When the space temperature falls below setpoint, the control valve shall modulate open to the coil on a call for heating by the wall mounted temperature sensor and shall enable the fan. On a rise in space temperature, the reverse shall occur.

DRAWINGS Sheet M0.2 - MECHANICAL SCHEDULES

1. CHANGE Air Cooled Chiller Schedule: revise scheduled “GPM” from 231 to 246.

2. CHANGE Pump Schedule: revise pumps P-1 through P-4 “TYPE” to base mounted “end suction”.

3. CHANGE Exhaust Fan Schedule: under “REMARKS”, change NOTE 6. Provide hinged roof curb cap……….. to NOTE 7.

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4. CHANGE Exhaust Fan Schedule: Change EF-7 “DRIVE” from belt drive to direct drive. Add variable frequency drive to control fan speed.

5. CHANGE Hot Water Unit Heater Schedule: Change UH-D Model Number to UHH-86.

6. CHANGE Fan Coil Unit Schedule: Add the following REMARK to D-FCU. “2. Provide with supply duct collar.”

7. CHANGE Fan Coil Unit Schedule: For A-FCU and B-FCU change “O.A. CFM” to 25 CFM.

8. CHANGE Grille Register Diffuser Schedule: For MARK D, E and F under “DESCRIPTION” change to Double Deflection Sidewall “GRILLE”.

9. CHANGE Grille Register Diffuser Schedule: Change MARK E to Mark G. All grilles and diffusers shown with a MARK E are existing.

Sheet M0.3 - MECHANICAL SCHEDULES

1. CHANGE Energy Recovery Ventilation Unit Schedule: Revise energy wheel data per Sketch MSK-001.

2. CHANGE ERV-2 Unit Diagram – Side View: Revise per Sketch MSK-002.

3. CHANGE Air Handling Unit Schedule – Under “SELECTION BASED ON” and “MCQUAY”.

4. ADD Air Handling Unit Schedule – Under REMARKS, add note 3 for AHU-2, 3, and 6 which shall read as follows: “3. Provide outside air and return air control dampers integral to unit.”

Sheet M0.4 – MECHANICAL SCHEDULES

1. CHANGE Air Handling Unit Schedule w/ Energy Recovery Wheel: Revise exhaust fan date per Sketch MSK-003.

2. CHANGE AHU-1, 4, and 5 Unit Components: Change Mark “N” – Outside Air Flow Monitoring Station to Mark “O”. Delete Component “J” Outside Air Damper.

Sheet M1.1 Through M1.5 – Floor Plan Area A through E – Mechanical – Demolition

1. CHANGE Demolition Notes: Add to demolition note 1 the following: “Condensate drain through exterior wall shall be removed and wall sleeve shall be fully grouted.

2. CHANGE Demolition Notes: Change demolition note 1, 3rd sentence to read as follows: “Provide an 18 gauge sheetmetal panel on back of wall louver to completely seal air and water tight.”

Sheet M1.1 – Floor Plan Area A – Mechanical – Demolition

1. DELETE In Room 106, delete note that reads “Refer to Architectural Drawings (TYP.)”

2. DELETE Demolition Notes: Delete Note 53. Sheet M1.2 – Floor Plan Area B – Mechanical – Demolition

1. DELETE In Room 205, delete note that reads “Refer to Architectural Drawings (TYP.)”

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Sheet M1.3 – Floor Plan Area C– Mechanical – Demolition

1. DELETE In Room 305, DELETE note that reads “Refer to Architectural Drawings (TYP.)”

2. DELETE Demolition Notes: DELETE Note 53.

Sheet M1.5 – Floor Plan Area E – Mechanical – Demolition

1. DELETE Demolition Notes: DELETE Note 31 and 38.

2. ADD In Room 610: ADD NOTE 32 to relief grille next to corridor door. Sheet M1.6 – Mechanical Mezzanine Rooms – Areas B and D Mechanical – Demolition

1. CHANGE Demolition Notes: Change Note 15 to read as follows: “DISCONNECT HOT WATER SUPPLY AND RETURN PIPING, CONDENSATE DRAIN PIPING AND CONTROL WIRING. DISCONNECT SUPPLY, RETURN, RELIEF AND OUTSIDE AIR DUCTWORK. EVACUATE REFRIGERANT PIPING IN ACCORDANCE WITH ALL FEDERAL STATE AND LOCAL REQUIREMENTS. DISCONNECT AND REMOVE AIR HANDLING UNIT. REFER TO SPECIFICATIONS FOR INSTRUCTIONS FOR REFRIGERANT RECOVERY, STORAGE, AND DELIVERY TO OWNER.

Sheet M2.1 – Floor Plan Area A – Mechanical – New Work 1. Room 108: ADD 6” round duct size to outside air ventilation duct serving fan coil unit.

2. Mezzanine No. 1 Plan: CHANGE 20/14 return duct size to 20/16.

Sheet M2.2 – Floor Plan Area B – Mechanical – New Work

1. Rooms 252, 253, 254, 256, 257, 258: ADD 6” round duct size to outside air ventilation duct serving fan coil unit.

2. Room 249: ADD 12” round flexible duct size to supply duct connected to fan coil unit. Sheet M2.3 – Floor Plan Area C– Mechanical – New Work

1. New Work Notes: ADD note 9 as follows: “ONCE CONSTRUCTION IN MEZZANINE IS COMPLETE, REINSTALL WOOD FRAMING AND PLYWOOD FLOOR PANELS REMOVED DURING DEMOLITION.”

2. Mezzanine No. 3 Plan: CHANGE 20/14 return duct size to 20/16.

3. Rooms 303 and 310: ADD 8” round flexible duct size to Type B diffusers (typical of 2).

Sheet M2.4 – Floor Plan Area D – Mechanical – New Work

1. Rooms 418, 419 and 420: DELETE ventilation supply diffusers and duct directly to fan coil unit. Refer to Sketch MSK-004.

2. Room 435: CHANGE Type E sidewall diffuser to Type G.

3. Room 404: ADD 20/10 return duct size to FCU-5.12. 13-5625 6

4. Room 405: MOVE outside air (350 cfm) leader from return duct to outside air duct serving FCU-5.12.

5. Room 440: Exhaust grille CFM is 75.

6. Room 441: Exhaust grille CFM is 50.

7. Room 444: Supply diffuser CFM is 265 (typical of 4).

8. Room 443: Supply diffuser CFM is 110.

9. Room 425: CHANGE Return Grille CFM from 195 to 145. Outside Air CFM is 25.

Sheet M2.5 – Floor Plan Area E – Mechanical – New Work

1. Room 605 and 610: ADD 10” round duct size to supply duct connected to ventilation diffuser TYPE C.

2. Room 645: ADD 6” round duct size to supply duct connected to ventilation diffuser TYPE A.

Sheet M2.6 – Mechanical Mezzanine Rooms - Area B and D – Mechanical – New Work

1. Mechanical Room 245 Plan and Mechanical Mezzanine No. 4 Plan: Control dampers shown in outside air, relief air, and return air ductwork to MAU-1 and MAU-2 are new and shall be provided by the automatic temperature control contractor.

2. Section B/2.6: ADD control dampers to outside air and exhaust air ductwork. Refer to Sketch MSK-005. Control dampers indicated for AHU-1 shall be provided by the automatic temperature control contractor.

3. Mechanical Mezzanine No. 2 Plan: Refer to Sketch MSK-006 for changes.

Sheet M2.7 – Mezzanine Plans - Area E – Mechanical – New Work

1. Mechanical Mezzanine Plan No. 7: Refer to Sketch SKM-007 for revisions to plan.

2. Section A/M2.7 and B/M2.7: Refer to Sketch SKM-008 for revision. Control dampers indicated for AHU-4 and 5 shall be provided by the automatic temperature control contractor.

3. Mechanical Room #242 Plan: CHANGE Room #242 to Room #442. Refer to Sketch SKM-009 for revision to Plan.

4. New Work Notes: DELETE Note 45.

Sheet M3.1 – Floor Plan - Area A – Mechanical – Attic

1. Floor Plan Area A– Mechanical – Attic: Refer to Sketch SKM-011 for revisions to plan.

Sheet M3.2 – Floor Plan - Area B – Mechanical – Attic

1. Floor Plan Area B– Mechanical – Attic: Refer to Sketch SKM-012 for revisions to plan.

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Sheet M3.3 – Floor Plan - Area C – Mechanical – Attic

1. Floor Plan Area B– Mechanical – Attic: Refer to Sketch SKM-013 for revisions to plan. Sheet M4.2 – Floor Plan - Area B – Piping – New Work

1. New Work Notes: CHANGE Note 22 to Note 23.

2. New Work Notes: CHANGE Note 23 to Note 22. Sheet M4.3 – Floor Plan - Area C – Piping – New Work



3. New Work Notes: ADD Note 20 as follows: “20. CONNECT CONDENSATE DRAIN PIPING TO EXISTING AS SHOWN. “

Sheet M4.4 – Floor Plan - Area D– Piping – New Work

1. Room 405: CLARIFICATION: Condensate drain located in corner of room inside new chase shall run down wall and penetrate exterior wall 12” above grade. Drain shall discharge 12” above grade on concrete splash block. Relocate unused splash block from other areas of the building to this location. Core drill hole in masonry wall and grout piping in place.

Sheet M5.1 – Enlarged Boiler Room Plan – Demolition and New Work

1. Demolition Plan: CLARIFICATION: For continuation of piping outside of Boiler Room, refer to Drawings Sheet M2.7.

2. New Work Plan: ADD new work note 35 to Pump P-5.

3. New Work Plan: CHANGE New Work Note 46 at EF-10 to Note 47.

4. New Work Notes: ADD Note 42 to read as follows: “42. PROVIDE DEPRESSION IN NEW SLAB SLOPED TO EXISTING FLOOR DRAIN.”

Sheet M6.1 – Chilled and Hot Water System Piping Diagrams

1. Hot Water System Piping Diagram: ADD New Work Note 41 and 56 to expansion tank.

2. Hot Water System Piping Diagram: ADD New Work Note 41 to chemical shot feeder.

3. Chilled Water System Piping Diagram: ADD New Work Note 41 and 57 to expansion tank.

4. Chilled Water System Piping Diagram: ADD New Work Note 41 to chemical shot feeder.

5. Chilled Water System Piping Diagram: ADD Isolation butterfly valves on CWS and CWR on inside of exterior wall. Add drain valves in CWS and CWR at connection the chiller at low point in piping.

6. New Work Notes: ADD Note 41 to read as follows: “41. PROVIDE NEW CONCRETE PAD AS REQUIRED TO SUIT NEW EXPANSION TANKS AND CHEMICAL SHOT FEEDERS.”

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Sheet M7.1 – Mechanical Details

1. DELETE “UNIT HEATER PIPING DIAGRAM”. Unit Heaters shall be piped as shown in “HOT WATER COIL PIPING DIAGRAM”.

2. “ROOF EXHAUST FAN DETAIL”: DELETE Notes 1 and 2. ELECTRICAL Sheet E1.7 – Mezzanine Plan – Area E – Auxiliary System – Demolition and New Work

1. Mezzanine Plan – Area E – Auxiliary System – New Work: Relocated duct smoke detector on AHU-4. Sheet E2.7 – Mezzanine Plan – Area E – Power – Demolition and New Work

1. Mezzanine Plan – Area E – Power – Demolition: Refer to sketch SKE 002 for revisions to plan.

2. Mezzanine Plan – Area E – Power – New Work: Refer to sketch SKE 003 for revisions to plan. Sheet E3.4 – Floor Plan – Area D – Lighting and Auxiliary Systems – New Work

1. Relocated duct smoke detector in space 442. Sheet E4.6 – Mezzanine Plan – Area B and D – Power – New Work

1. Mezzanine Plan – Area B – Electrical: Refer to sketch SKE 005 for revisions to plan. Attachments: Specifications & Drawings Pre-Bid Conference Sign-in Sheet Plan Holders List School Calendar Certification of Compliance-Code of Virginia 22.1-2961 Form This Addendum 1 is incorporated into the IFB Bid Documents and will be made part of the resulting contract and Bidder shall acknowledge receipt of the Addendum by signing in the space provided on the Bid Form. All other provisions of the IFB shall remain unchanged.

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HVAC Replacement James River Elementary School

Williamsburg-James City County, Virginia

ROUGH CARPENTRY – Addendum No. 1 06100 - 1

SECTION 06100 - ROUGH CARPENTRY

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Framing with dimension lumber. 2. Subflooring in attic spaces and mechanical mezzanines.

1.3 DEFINITIONS

A. Exposed Framing: Framing not concealed by other construction.

B. Dimension Lumber: Lumber of 2 inches nominal (38 mm actual) or greater but less than 5 inches nominal (114 mm actual) in least dimension.

C. Lumber grading agencies, and the abbreviations used to reference them, include the following:

1. NeLMA: Northeastern Lumber Manufacturers' Association. 2. NLGA: National Lumber Grades Authority. 3. RIS: Redwood Inspection Service. 4. SPIB: The Southern Pine Inspection Bureau. 5. WCLIB: West Coast Lumber Inspection Bureau. 6. WWPA: Western Wood Products Association.

1.4 ACTION SUBMITTALS

A. Product Data: For each type of process and factory-fabricated product. Indicate component materials and dimensions and include construction and application details.

1.5 INFORMATIONAL SUBMITTALS

A. Material Certificates: For dimension lumber specified to comply with minimum allowable unit stresses. Indicate species and grade selected for each use and design values approved by the ALSC Board of Review.

B. Evaluation Reports: For the following, from ICC-ES:




1. Wood-preservative-treated wood.

1.6 QUALITY ASSURANCE

A. Testing Agency Qualifications: For testing agency providing classification marking for fire-retardant treated material, an inspection agency acceptable to authorities having jurisdiction that periodically performs inspections to verify that the material bearing the classification marking is representative of the material tested.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Stack lumber flat with spacers beneath and between each bundle to provide air circulation. Protect lumber from weather by covering with waterproof sheeting, securely anchored. Provide for air circulation around stacks and under coverings.

PART 2 - PRODUCTS

2.1 WOOD PRODUCTS, GENERAL

A. Lumber: DOC PS 20 and applicable rules of grading agencies indicated. If no grading agency is indicated, provide lumber that complies with the applicable rules of any rules-writing agency certified by the ALSC Board of Review. Provide lumber graded by an agency certified by the ALSC Board of Review to inspect and grade lumber under the rules indicated.

1. Factory mark each piece of lumber with grade stamp of grading agency. 2. Where nominal sizes are indicated, provide actual sizes required by DOC PS 20 for

moisture content specified. Where actual sizes are indicated, they are minimum dressed sizes for dry lumber.

3. Provide dressed lumber, S4S, unless otherwise indicated.

B. Maximum Moisture Content of Lumber: 15 percent for 2-inch nominal (38-mm actual) thickness or less, 19 percent for more than 2-inch nominal (38-mm actual) thickness unless otherwise indicated.

2.2 WOOD-PRESERVATIVE-TREATED LUMBER

A. Preservative Treatment by Pressure Process: AWPA U1; Use Category UC2 for interior construction not in contact with the ground, Use Category UC3b for exterior construction not in contact with the ground, and Use Category UC4a for items in contact with the ground.

1. Preservative Chemicals: Acceptable to authorities having jurisdiction and containing no arsenic or chromium.

2. For exposed items indicated to receive a stained or natural finish, use chemical formulations that do not require incising, contain colorants, bleed through, or otherwise adversely affect finishes.




B. Kiln-dry lumber after treatment to a maximum moisture content of 19 percent. Do not use material that is warped or that does not comply with requirements for untreated material.

C. Mark lumber with treatment quality mark of an inspection agency approved by the ALSC Board of Review.

D. Application: Treat items indicated on Drawings, and the following:

1. Wood cants, nailers, curbs, equipment support bases, blocking, stripping, and similar members in connection with roofing, flashing, vapor barriers, and waterproofing.

2.3 DIMENSION LUMBER FRAMING

A. Miscellaneous Wood Framing

1. Application: All interior wood framing. 2. Species:

a. Hem-fir (north); NLGA. b. Mixed southern pine; SPIB. c. Spruce-pine-fir; NLGA. d. Hem-fir; WCLIB, or WWPA. e. Spruce-pine-fir (south); NeLMA, WCLIB, or WWPA. f. Northern species; NLGA. g. Eastern softwoods; NeLMA. h. Western woods; WCLIB or WWPA.

2.4 SUBFLOORING

A. Plywood Subflooring: Exposure 1, single-floor panels or sheathing.

1. Span Rating: Not less than 24 o.c. 2. Nominal Thickness: Not less than 23/32 inch (18.3 mm) minimum. Verify and match

existing adjacent plywood thickness.

2.5 MISCELLANEOUS LUMBER

A. General: Provide miscellaneous lumber indicated and lumber for support or attachment of other construction, including the following:

1. Blocking. 2. Nailers. 3. Rooftop equipment bases and support curbs. 4. Cants. 5. Furring. 6. Grounds. 7. Utility shelving. 8. Miscellaneous wood framing




B. For items of dimension lumber size, provide Construction or No. 2 grade lumber and the following species:

1. Hem-fir (north); NLGA. 2. Mixed southern pine; SPIB. 3. Spruce-pine-fir; NLGA. 4. Hem-fir; WCLIB or WWPA. 5. Spruce-pine-fir (south); NeLMA, WCLIB, or WWPA. 6. Western woods; WCLIB or WWPA. 7. Northern species; NLGA. 8. Eastern softwoods; NeLMA.

C. For blocking not used for attachment of other construction, Utility, Stud, or No. 3 grade lumber of any species may be used provided that it is cut and selected to eliminate defects that will interfere with its attachment and purpose.

D. For blocking and nailers used for attachment of other construction, select and cut lumber to eliminate knots and other defects that will interfere with attachment of other work.

E. For furring strips for installing plywood or hardboard paneling, select boards with no knots capable of producing bent-over nails and damage to paneling.

2.6 FASTENERS

A. General: Provide fasteners of size and type indicated that comply with requirements specified in this article for material and manufacture.

1. Where rough carpentry is exposed to weather, in ground contact, pressure-preservative treated, or in area of high relative humidity, provide fasteners with hot-dip zinc coating complying with ASTM A 153/A 153M

B. Nails, Brads, and Staples: ASTM F 1667.

C. Power-Driven Fasteners: NES NER-272.

D. Wood Screws: ASME B18.6.1.

E. Lag Bolts: ASME B18.2.1 (ASME B18.2.3.8M).

F. Bolts: Steel bolts complying with ASTM A 307, Grade A (ASTM F 568M, Property Class 4.6); with ASTM A 563 (ASTM A 563M) hex nuts and, where indicated, flat washers.

2.7 MISCELLANEOUS MATERIALS

A. Adhesives for Field Gluing Panels to Framing: Formulation complying with APA AFG-01 or ASTM D 3498 that is approved for use with type of construction panel indicated by manufacturers of both adhesives and panels.




1. Adhesives shall have a VOC content of 70g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2. Adhesives shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Set rough carpentry including miscellaneous wood framing to required levels and lines, with members plumb, true to line, cut, and fitted. Fit rough carpentry to other construction; scribe and cope as needed for accurate fit. Locate nailers, blocking, and similar supports to comply with requirements for attaching other construction.

B. Framing Standard: Comply with AF&PA's WCD 1, "Details for Conventional Wood Frame Construction," unless otherwise indicated.

C. Install plywood backing panels by fastening to studs; coordinate locations with utilities requiring backing panels.

D. Provide blocking and framing as indicated and as required to support facing materials, fixtures, specialty items, and trim.

1. Provide metal clips for fastening gypsum board or lath at corners and intersections where framing or blocking does not provide a surface for fastening edges of panels. Space clips not more than 16 inches (406 mm) o.c.

E. Sort and select lumber so that natural characteristics will not interfere with installation or with fastening other materials to lumber. Do not use materials with defects that interfere with function of member or pieces that are too small to use with minimum number of joints or optimum joint arrangement.

F. Securely attach rough carpentry work to substrate by anchoring and fastening as indicated, complying with the following:

1. NES NER-272 for power-driven fasteners. 2. Table 2304.9.1, "Fastening Schedule," in ICC's International Building Code. 3. Table R602.3(1), "Fastener Schedule for Structural Members," and Table R602.3(2),

"Alternate Attachments," in ICC's International Residential Code for One- and Two-Family Dwellings.

G. Use steel common nails unless otherwise indicated. Select fasteners of size that will not fully penetrate members where opposite side will be exposed to view or will receive finish materials. Make tight connections between members. Install fasteners without splitting wood. Drive nails snug but do not countersink nail heads unless otherwise indicated.




3.2 WOOD, AND NAILER INSTALLATION

A. Install where indicated and where required for attaching other work. Form to shapes indicated and cut as required for true line and level of attached work. Coordinate locations with other work involved.

B. Attach items to substrates to support applied loading. Recess bolts and nuts flush with surfaces unless otherwise indicated.

3.3 WOOD STRUCTURAL PANEL INSTALLATION

A. General: Comply with applicable recommendations in APA Form No. E30, "Engineered Wood Construction Guide," for types of structural-use panels and applications indicated.

B. Fastening Methods: Fasten panels as indicated below:

1. Subflooring:

a. Glue and screw to wood framing. b. Space panels 1/8 inch (3 mm) apart at edges and ends.

END OF SECTION 06100

PLAN HOLDERS LIST

IFB 13-5625

JAMES RIVER ELEMENTARY SCHOOL HVAC SYSTEM REPLACEMENT

ISQFT

BUILDERS & CONTRACTORS

CDC PUBLISHING LLC

VIRTEXCO

BAYSIDE CONTRACTING

D.E. KIRBY

COMFORT SYSTEM OF VIRGINIA

E & P ELECTRICAL CO.

EMC

DOMINION ENERGY MANAGEMENT

WARWICK PLUMBING & HEATING

THE BLUE BOOK

MCGRAW-HILL

HARRIS HEATING & PLUMBING

ZBZ & ASSOC.

REED CONSTRUCTION

CERTIFICATION OF COMPLIANCE WITH § 22.1-296.1 OF THE CODE OF VIRGINIA, 1950, AS AMENDED. I, ______________________________, a duly authorized representative and officer of _______________________________ (Contractor’s name), in accordance with § 22.1-296.1 the Code of Virginia, 1950, as amended , hereby certifies that the employees, subcontractors, partners, and representatives who will be in direct contact with students (i) have not been convicted of a felony or any offense involving the sexual molestation or physical or sexual abuse or rape of a child; and (ii) have not been convicted of a crime of moral turpitude. For the purposes of this certification, "direct contact with students" is defined as "being in the presence of students during regular school hours or during school-sponsored activities." Any person making a materially false statement regarding any such offense shall be guilty of a Class 1 misdemeanor and, upon conviction, the fact of such conviction shall be grounds for the revocation of the contract to provide such services and, when relevant, the revocation of any license required to provide such services. Williamsburg-James City County Public School Division shall not be liable for materially false statements regarding the certifications required by the Code of Virginia. The contractor is responsible for ensuring that each of its employees, subcontractors, partners, and representatives who will be in direct contact with students have [also executed a copy of this certification agreement] and shall maintain such certifications on file for the duration of the contract period. I understand that I am required to update this certification if I become aware of changed circumstance. I do understand the above information and certify that the above statements are true. ________________________________________ (Contractor’s Authorized Office – Signature) ________________________________________ (Contractor’s Authorized Officer – Printed Name) __________________________________ (Title) ______________________ (Date)