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SECTION 05 05 14

HOT-DIP GALVANIZING

PART 1- GENERAL

1.1 DESCRIPTION

A. Work included: Hot-dip galvanize iron and steel items as shown on the drawings.

B. Related Sections:

1. Section 01 45 27 - Shop Inspections.

2. Section 05 50 00 - Metal Fabrications.

1.2 REFERENCE STANDARDS

A. American Society for Testing and Materials (ASTM):

1. A 123 Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

2. A 143 Safeguarding Against Embrittlement of Hot-Dip Galvanized StructuralSteel Products and Procedure for Detecting Embrittlement

3. A 153 Zinc Coating (Hot-Dip) on Iron and Steel Hardware

4. A 384 Safeguarding Against Warpage and Distortion During Hot-DipGalvanizing of Steel Assemblies

5. A 385 Providing High-Quality Zinc Coatings (Hot-Dip)

1.3 QUALITY ASSURANCE

A. Qualifications:

1. Applicator: Regularly engaged in application of hot-dip galvanized coatingsfor at least two years immediately prior to this work

2. Workers: Experienced and knowledgeable in preparation for and application ofhot-dip galvanized coatings.

1.4 PRODUCT HANDLING, STORAGE AND DELIVERY

A. Handle all products to be galvanized in such a manner as to avoid any mechanicaldamage and to minimize distortion.

B. Load and store galvanized products to prevent formation of wet storage film.

09/19/112027 05 05 14 - 1 Hot-Dip Galvanizing

1. Stack or bundle galvanized products to allow air between the galvanizedsurfaces.

2. Do not store galvanized products directly on the ground.

PART 2 - NOT USED

PART 3 - EXECUTION

3.1 SURFACE PREPARATION

A. Pre-clean steel work utilizing an alkaline cleaner, acid pickle, and flux.Alternatively, the steel shall be blast cleaned and fluxed.

3.2 APPLICATION OF COATING

A. Galvanize steel members, fabrications, and assemblies by the hot-dip process inaccordance with ASTM A 123.

B. Galvanize bolts, nuts, and washers, and iron and steel hardware components inaccordance with ASTM A 153.

C. Safeguard products against steel embrittlement in conformance with ASTM A 143.

D. Clean damaged surfaces of galvanized metals and touch up with zinc-rich paintconforming to ASTM A 780. Extent of repair area to be approved by the Engineer.

3.3 INSPECTION

A. All materials and workmanship will be inspected to ensure that both fully meetthese specifications. Any work found deficient shall be replaced and brought up tofull compliance with these specifications.

B. Provide notification for Engineer prior to coating application. See Section 01 45 27for inspection advance notification requirements and District travel expenses.

END OF SECTION

09/19/112027 05 05 14 - 2 Hot-Dip Galvanizing

SECTION 05 05 24

PIPE WELDING

PART 1- GENERAL

1.1 DESCRIPTION

A. Work included:

1. Shop welding of steel pipe fabrications.

2. Field welding of steel pipe and fittings.


1. Section 01 45 27 - Shop Inspection.

2. Section 33 11 06 - Fabricated Pipe Specials.

3. Section 33 11 13.05 - Installation of Steel Pipe.

4. Section 40 20 20 - Liquids Process Piping.

1.2 TERMS AND DEFINITIONS

A. American Welding Society Certified Welding Inspector (AWS CWI) - A personqualified as a welding inspector as given in AWS QC1-96, Standard for AWSCertification of Welding Inspectors.

B. Nondestructive Examination (NDE) - The act of determining the suitability of somematerial or component for its intended purpose using techniques that do not affectits serviceability.

C. Procedure Qualification Record (PQR) - A record of welding variables used toproduce an acceptable test weldment and the results of tests conducted on theweldment to qualify a welding procedure specification.

D. Welding Procedure Specification (WPS) - A document providing the requiredwelding variables for a specific application to assure repeatability by properlytrained welders and welding operators.

E. See AWS 3.0-94, Standard Welding Terms and Definitions, for other terms anddefinitions.

1.3 APPLICABLE CODES AND STANDARDS

A. ASME Boiler & Pressure Vessel Code, Section V, Nondestructive Examination,1998 Edition including addenda, supplements, and interpretations.

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B. ASME Boiler & Pressure Vessel Code, Section VIII, Rules for Construction ofPressure Vessels, 1998 Edition including addenda, supplements, and interpretations.

C. ASME Boiler & Pressure Vessel Code, Section IX, Qualification Standard forWelding and Brazing Procedures, Welders, Brazers, and Welding and BrazingOperators, 1998 Edition including addenda, supplements, and interpretations.

D. AWS D1.1 Structural Welding Code - Steel, latest edition.


A. Welding Procedure Specifications:

1. All welds shall be completed in accordance with a qualified WPS.

a. The Contractor may use a pre-qualified WPS per AWS D1.1, Section 3including exceptions for GMAW identified in Paragraph 3.2.1.

2. All WPS's that are not pre-qualified as given above shall be qualified inaccordance with one of the following:

a. ASME Boiler & Pressure Vessel Code, Section IX, or

b. AWS D1.1, Section 4.

3. An AWS CWI shall review all WPS's.

4. An AWS CWI shall witness all PQR's.

B. Qualification of Welders:

1. Welders shall be qualified under ASME Boiler & Pressure Vessel Code,Section IX, Part QW; or AWS D1.1, Section 4 for the welding processes,positions, and procedures to be used for this project.

2. Welders shall have verifiable evidence they have maintained theirqualifications in accordance with AWS D1.1, Section 4 or ASME Boiler &Pressure Vessel Code, Section IX, Part QW-322.

3. Welder Qualification(s) shall be witnessed and evaluated by an AWS CWI.

C. Nondestructive Examination of Production Welds:

1. In addition to any NDE required by the Contract Documents, the Engineer mayelect to perform additional NDE of in-process or completed shop or field weldsto verify weld quality. Any additional NDE may be performed by Districtpersonnel or the Engineer may request the Contractor perform or subcontractthese examinations.

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2. Types of NDE:

a. Radiographic Examination (RT) per Paragraph UW-52, Section VIII,ASME Boiler & Pressure Vessel Code.

b. Ultrasonic Examination (UT) per Paragraph UW-53, Section VIII, ASMEBoiler & Pressure Vessel Code.

c. Other non-destructive tests such as Liquid Penetrant (PT) and MagneticParticle (MT) in accordance with Section V, ASME Boiler & PressureVessel Code. Acceptance criteria shall be as given by AWS D.1,Section 6, Part C.

3. Cost of Examinations:

a. The cost of NDE identified in the Contract Documents for specificwelded connections shall be borne by the Contractor.

b. The cost of additional NDE requested by the District shall be borne bythe Contractor including re-inspection and re-examination of rejectedwelds.

c. The cost of NDE performed by District personnel will be borne by theDistrict. The costs of repairs, re-inspection and re-examination resultingfrom a rejected weld shall be borne by the Contractor.

1.5 SUBMITTALS

A. Certification of welders:

1. Submit verifiable evidence of initial qualification for each welder.

2. Submit verifiable evidence indicating each welder has maintained currentqualification under the applicable code.

B. Submit WPS's with supporting PQR's for approval.

C. Submit verifiable evidence of the certification of all personnel performing NDE orinterpreting the test results to ASNT-TC-1A or AWS.

D. Provide all submittals to Engineer at least 14 days prior to commencing pipewelding, except that WPS's and PQR's shall be submitted two months prior tocommencing pipe welding.

09/19/112027 05 05 24 - 3 Pipe Welding

PART 2 - NOT USED

PART 3 - EXECUTION

3.1 GENERAL PROCEDURES

A. Use shielded metal arc welding (SMAW) method or flux cored arc welding(FCAW) method unless the Engineer approves another method prior to use.

B. Welds shall be fused with base metal, uniform in appearance, free from cracks andreasonably free from irregularities. Weld toes shall blend smoothly and graduallyinto the base material

C. Restart in weld zone on clean and sound metal.

D. Limit porosity and slag inclusions in accordance with Section VIII, ASME Boiler &Pressure Vessel Code.

E. Remove defective welds by chipping, grinding, flame gouging, or air-arc gougingand repair by re-welding.

F. Do not undercut along side of finished pass.

G. Use procedures or welding sequences that will minimize eccentric stresses, shear ordistortion in the weld.

H. Butt welds, where authorized, shall have complete penetration and fusion.

I. Finished weld bead shall be central to the seam.

J. Artificial or forced cooling of welded joints is not permitted.

K. Low hydrogen electrode storage shall be in accordance with AWS D1.1, Article 4.5.

L. See District Standard Drawings 323-EA, 324-EA, and 325-EA for welding offlanges.

M. Joining Dissimilar Metals

1. When joining carbon steel to various stainless steels, the following fillermaterial shall be used unless otherwise called out on the drawings:

a. Carbon steel to stainless steel: 309L filler material.

b. Carbon steel to type 316L stainless steel: 316L filler material.

3.2 MANUAL WELDING

A. Welding shall be performed in at least two layers and in accordance with approvedWPS.

09/19/112027 05 05 24 - 4 Pipe Welding

B. Passes shall not exceed 1/4 inch in throat dimension and shall be in accordance withapproved WPS.

C. Welds shall be thoroughly cleaned after each pass.

3.3 QUALITY CONTROL

A. Shop Inspection

1. The District will perform inspections and witness tests during all phases ofpipe fabrication. Notify District Plant Inspection Section as specified inSection 01 45 27.

2. Provide notification for Engineer to be present for testing. See Section01 45 27 for inspection advance notification requirements and District travelexpenses.

3. Failure by the Engineer to inspect or witness tests at the manufacturer's plantshall not be construed as waiving inspection upon delivery.

3.4 NOTCH TOUGH WELDING

A. Notch welding that requires heat input control is required for all pipe, specials andfittings with steel thickness 7/16 inch and greater

1. WPS for shop welding shall be qualified in accordance with ASME BoilerPressure Vessel Code Section IX and shall include Supplementary EssentialVariables

2. WPS for field welding shall be qualified in accordance with AWS D1.1

3. PQRs shall be qualified for notch tough welding with consideration forthickness of steel, test temperature, and Charpy V-notch CVN values. Refer toAWS Ddl. 1, Annex III Requirements for CVN Testing, Option A (threespecimens).

END OF SECTION

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SECTION 05 05 26

FLANGE BOLTING

PART 1- GENERAL

1.1 DESCRIPTION

A. Work included: Furnish and install bolts, washers, and nuts for flanged connectionsand where shown on the drawings.


1. Division 33 - Utilities.

2. Section 40 20 20 - Liquids Process Piping.

1.2 REFERENCES

A. American National Standards:

1. ANSI B 1.1: Unified Inch Screw Threads (UN and UNR Thread Form)

2. ANSI B18.2.1: Square and Hex Bolts and Screws, Inch Series.

3. ANSI B 18.2.2: Square and Hex Nuts, Inch Series.

4. ANSI B1 8.22.1: Plain Washers.

B. ASTM Standards:

1. ASTM A 153: Standard Specification for Zinc Coating (Hot-Dip) on Ironand Steel Hardware

2. ASTM A 193: Specification for Alloy-Steel and Stainless Steel BoltingMaterials for High-Temperature Service.

3. ASTM A449: Specification for Quenched and Tempered Steel Bolts andStuds.

4. ASTM A563: Specification for Carbon and Alloy Steel Nuts.

5. ASTM F436: Specification for Hardened Steel Washers.

6. ASTM F844: Specification for Washers, Steel, Plain (Flat), Unhardened forGeneral Use.

C. SAE Standards:

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1. SAE J429: Mechanical and Materials Requirements for ExternallyThreaded Fasteners.

2. SAE J995: Mechanical and Material Requirements for Steel Nuts.

1.3 SUBMITTALS

A. Submit manufacturer's literature and application schedule for all bolting todemonstrate conformance with these specifications.

PART 2 - PRODUCTS

2.1 MATERIALS

Bolts: ASTM A449, Type 1 or SAE J429, Grade 5

ASTM A563, Grade B or SAE J995,1/4s tGrade 5, standard hexagonal flat nuts

NutsGreater than ASTM A563, Grade A, heavy

Carbon Steel 1-1/2": hexagonal flat nuts

Diameter 1" ASTM F436 or ASTM F844and smaller:

WashersDiameterDiameer I ASTM F436larger than 1":

Coating Galvanized ASTM A153

Nuts and ASTM A193, Class 1, B8 (Type 304) or B8MStainless Steel Bolts (Type 316)

Washers Type 304 or 316 to match bolts and nuts

2.2 CONSTRUCTION

Bolts ANSI B 18.2.1, standard hexagonal heads

Nuts ANSI B 18.2.2

Washers ANSI B 18.22.1 Type A, narrow plain finish

2.3 BOLTING MATERIAL OTHER THAN STEEL

A. Threading and dimensions shall conform to the requirements for steel heads andnuts.

B. Class 3 Fit ANSI Bl.1.

09/19/112027 05 05 26 - 2 Flange Bolting

2.4 BOLT MARKING

A. Identification symbols shall be applied to each bolt head to identify the material andgrade of each bolt. The bolt identification symbols shall be as follows:

1. Carbon Steel: Three radial lines, 120 degrees apart.

2. Stainless Steel: B8 (type 304), B8M (type 316).

2.5 LENGTH OF BOLT

A. After assembly, the bolts shall extend a minimum distance of two threads beyondthe nut. In addition, the bolt length shall be no longer than 1-inch beyond the nut,and shall not interfere with any appurtenance or the operation of any device.

2.6 THREADS

A. Coarse thread series - Class 2 Fit ANSI B 1.1.

2.7 BOLT THREAD ANTI-SEIZE COMPOUND

A. Compound shall be food grade meeting USDA code H2 standards for incidentalcontact, and shall be designed to prevent rusting, seizure and galling of bolt threads.

B. Acceptable products:

1. Loctite Food Grade Anti-Seize.

2. Saf-T-Eze, by Saf-T-Lok®.

3. Or equal as approved by the Engineer.

PART 3 - EXECUTION

3.1 FLANGE BOLTING PROCEDURES

A. See Drawings 323-EA, 324-EA, and 325-EA. Install appropriate gasket.

B. Install washers under both bolt heads and nuts.

C. Coat bolt threads with anti-seize compound.

3.2 NATIONAL ELECTRIC CODE GROUNDING

A. The National Electric Code requires grounding of water piping systems. In order toensure grounding of bolted flanges with fusion bonded epoxy or high build epoxycoatings the coating under two nuts per flange (four nuts per joint) shall be removedby grinding and special stainless steel lockwashers shall be used for these nuts/bolts.After completion of bolted flange, the electrical continuity shall be confirmed with a

09/19/112027 05 05 26 - 3 Flange Bolting

volt/ohm meter for each joint. Also, when the pipe system has been completed, thecontinuity of the entire pipe system shall be similarly checked.

3.3 BOLT APPLICATION SCHEDULE

A. See Section 40 20 20.

END OF SECTION

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SECTION 05 12 00

STRUCTURAL STEEL FRAMING

PART 1- GENERAL

1.1 DESCRIPTION

A. Work included: Furnish and install structural steel elements as shown on thestructural drawings and as specified herein.

B. Related work specified elsewhere:

1. Section 05 50 00 - Metal Fabrications.

2. Section 09 91 00 - Painting.


A. Qualifications of Workmen:

1. A foreman experienced in the work being done shall be on the job at all times.

2. The Contractor shall qualify all welders and welding procedures inaccordance with the latest edition of AWS D1.1, Section 4, StructuralWelding Code - Steel or AWS D1.3, Structural Welding Code - Sheet Steel asapplicable. Notify the Engineer in advance of welder and welding procedurequalification so the Engineer may witness qualification.

B. Codes and Standards:

1. All fabrication and erection of steel elements shall conform to AISC"Specification for the Design, Fabrication, and Erection of Structural Steel forBuildings" and the "Code of Standard Practice for Steel Buildings andBridges" except as modified by the applicable building codes, unless specifiedotherwise.

2. Welding shall be by the shielded metal arc, gas metal arc (spray arc mode),gas shield flux cored arc (dual shield) or submerged arc welding processesand shall be in accordance with AWS D1.1, Structural Welding Code - Steelor AWS D1.3, Structural Welding Code - Sheet Steel as applicable.

3. All welding of ASTM A 36 structural steel shall be done using E70XXelectrodes conforming to AWS A5. 1, Specification for Carbon Steel CoveredArc-Welding Electrodes, or using electrodes and fluxes conforming to AWSA5.17, Specification for Carbon Steel Electrodes and Fluxes forSubmerged-Arc Welding using an F7X-EXXX electrode-flux combination.

09/19/11 Structural2027 05 12 00 - 1 Steel Framing

4. Low hydrogen electrode storage shall be in accordance with AWS D1. 1,Article 4.5.

C. Testing And Inspection:

1. The Engineer may test any weld or a part of any weld in accordance withAWS D1.1.

2. The District has the option of tests to be performed by an independentlaboratory.

3. Such laboratory shall perform testing and inspection as required by drawingsand specifications. Selected agency will follow requirements of ASTM E329, "Standard Specification for Agencies Engaged in ConstructionInspection and/or Testing." Testing shall be performed by certified personnelutilizing calibrated equipment. The Engineer shall be notified in writing ofdefective welds, bolts, nuts, and washers within 7 working days of the date ofweld inspection.

a. Visual Inspection: Visually inspect all shop and field welds, includingfillet weld end returns.

b. Nondestructive Testing: Test all full- and partial-penetration welds byradiographic or ultrasonic method. Magnetic particle testing shall beused only in areas inaccessible to either radiographic or ultrasonic testing.Retest defective areas after repair.

4. Cost of tests:

a. Test failure: The cost of tests shall be borne by the Contractor includingfollow-up tests after repair.

b. Test satisfactory: The cost of tests shall be borne by the Contractor.

D. Tolerances:

1. Dimensional tolerances and allowances for fit shall be in accordance withapplicable AWS Standards unless shown otherwise. Tolerances andallowances shall be shown on the Contractor's erection or working drawings.

E. Mechanical Fasteners:

1. Mechanical fasteners may be added to the structural joints to facilitate fielderection. But unless otherwise approved by the Engineer, these fasteners shallnot allow the Contractor to waive the required welded connections shown inthe structural drawings.


1.3 SUBMITTALS

A. Submit all welding procedures and welder qualification records using formsprovided in the appendix to AWS D 1.1 welding code prior to any productionwelding.

B. Certifications:

1. Submit current certifications of welders qualifications as per AWS D1. 1,paragraph 5.30 prior to welding work. Welder certifications shall verify thequalifications for the welding process and procedure to be used.

2. Submit certifications, mill tests, or reports from an approved independenttesting laboratory for the conformance of structural steel to be used with thespecified ASTM requirements.

C. Fabrication Drawings:

1. Submit fabrication drawings for Engineer's review prior to fabrication.Drawings shall not be reproductions of contract drawings. Include completeinformation for the fabrication and erection of the structure's components,including location, type, and size of bolts, welds, member sizes and lengths,connection details, blocks, copes, cuts and cambers. Use AWS standardwelding symbols.

D. Erection Drawings:

1. The drawings shall indicate methods of installation, the location of any itemsubstitutions, and details requiring coordination and/or installation by othertrades.

E. Substitutions Proposed by the Contractor:

1. Submit the information on substitutions for structural details shown in thedrawings for the Engineer's approval. Submit complete design calculationsfor the substitutions for structural details signed by a California registeredCivil or Structural Engineer.

1.4 PRODUCT HANDLING

A. Store and protect materials in a manner to maintain identification, to preventdamage, and to prevent corrosion.

B. In the event of damage, immediately make all repairs and replacements necessary asapproved by the Engineer.


1.5 COORDINATION

A. The Contractor shall coordinate installation of bucks, anchors, blocking, drains,pipes, electrical and mechanical work which is to be placed in or behind partitionframing and allow such items to be installed after framing is complete.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Structural Steel:

1. All structural steel, unless noted otherwise, shall conform to ASTM A 36.ASTM A36/A572 dual-grade steel is permitted for non-moment connections inrigid frames only.

2. Steel for structural tubes shall conform to ASTM A 500, Grade B.

3. Steel for structural pipe members shall conform to ASTM A 53, Grade B.

B. Miscellaneous metal accessories and structures:

1. Steel for miscellaneous metal accessories and structures unless specifiedotherwise, shall conform to ASTM A 36.

C. Bolts: ASTM A 307, Grade A.

D. Anchor bolts: ASTM A 307, Grade C.

E. Galvanizing: All metal items situated in pits at any distance at all below main finishfloor elevation shall be hot dip galvanized after fabrication.

PART 3 - EXECUTION

3.1 VERIFICATION

A. Examine areas and conditions under which structural steel elements are to beinstalled.

B. Correct conditions detrimental to the proper and timely completion of the work.

C. Do not proceed until unsatisfactory conditions have been corrected to the Engineer'ssatisfaction.

3.2 FABRICATION

A. All structural items shall be carefully fabricated to true dimensions without warp ortwist. Welded closures shall be neatly made; and where weld material interfereswith fit or is unsightly in appearance, it shall be ground off smooth. Weld profileshall meet AWS D 1.1, paragraph 3.6 requirements.


B. All structural steel shall be shop primed. See Section 09 91 00.

3.3 INSPECTION

A. All materials and workmanship will be inspected to ensure that both fully meetthese specifications. Any work found deficient must be replaced and brought up tofull compliance with these specifications.

B. Provide notification for Engineer to be present for fabrication. See Section 01 45 27for inspection advance notification requirements and District travel expenses.

3.4 ERECTION AND INSTALLATION

A. The Contractor shall take all measurements necessary to properly fit his work in thefield. The Contractor shall be responsible for the correct fitting of all metalwork inthe field.

B. Redrilling, reshaping, or forcing to fit any fabricated item will not be permitted.The Contractor shall be responsible for placing anchor bolts or other anchoringdevices accurately and making any surfaces which bear against structural elementssmooth and true to level. Provide manufacturer's data for installation and testing ofanchorages.

C. Structural items needing a special alignment to preserve straight, level, even,smooth lines shall be rigidly supported and braced and kept braced until concrete,grout, or dry pack cement mortar has hardened for period of not less than 7 days.

END OF SECTION


SECTION 05 50 00

METAL FABRICATIONS

PART 1- GENERAL

1.1 DESCRIPTION

A. Work included: Fabricate and install miscellaneous metal work as shown on thedrawings and specified herein.

B. Related work specified elsewhere:

1. Section 01 45 27 - Shop Inspection.

2. Section 05 05 14 - Hot-Dip Galvanizing.

3. Section 05 12 00 - Structural Steel Framing.

4. Section 33 11 06 - Fabricated Pipe Specials.


A. Design, fabrication, and erection of structural steel, steel assemblies and shop andfield welding shall meet applicable requirements of the AISC Specifications.

B. Application of zinc (hot-dip galvanized) coatings to metal fabrications shallconform to Section 05 05 14.

C. Aluminum welding shall conform to ANSI/AWS D1.2 Latest Edition -90 StructuralWelding Code-Aluminum "Suggested Specifications for Structures of AluminumAlloys 6061-T6" unless otherwise noted.

D. Stainless Steel welding shall conform to ANSI/AWS D1.6 Latest edition-StructuralWelding Code-Stainless Steel.

1.3 SUBMITTALS

A. Submit complete fabrication and erection drawings for the Engineer's approval priorto cutting or fabrication. Shop drawings shall show the details of fabrication withweld symbols in accordance with AWS A2.4 for all joints to be welded.

B. Certification of Welders:

1. Submit verifiable evidence of initial qualification for each welder.

2. Submit verifiable evidence each welder has maintained currentqualification(s).

C. Submit WPS's with supporting PQR's for approval.

09/19/112027 055000-1 Metal Fabrications

D. Provide all submittals to Engineer at least 14 working days prior to commencingwelding, except that WPS's and PQR's shall be submitted 44 working days prior tocommencing welding.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Standard rolled steel sections: ASTM A 36.

B. Steel structural tubing: ASTM A 500.

C. Nonstructural steel bars, angles, rods, clips, brackets, supports, and similar items:ASTM A 36 and A 283.

D. Stainless steel plate: ASTM A 240, Type 304L.

E. Stainless Steel Tubing ASTM A269. Type 304L and 316L

F. Aluminum: Rolled or extruded from 6061 T6 alloy, ASTM B 308 and B 632, exceptas shown on the drawings.

G. Steel bolts:

1. All except flanges and anchor bolts, ASTM A 307 Grade A.

2. Flanges, Section 05 05 26.

3. Anchor Bolts, as specified below.

H. Stainless steel bolts: ASTM A 193, A 320, or F 593-S8, Type 304 or 316.

I. Steel Pipe: ASTM A 53.

J. Stair treads:

1. NAAMM, grating manufacturer's standard 19-W-4 steel with 2-1/2" x 3/16"carrier plates and abrasive nosing.

2. Hot dip galvanize after fabrication.

3. Bearing bars shall be 1" x 3/16".

4. Acceptable products:

a. Irving, Type IWA

b. Ryerson, Ry-weld 19-W-4

c. Blaw Knox, Type J


K. Non-slip tread nosing: Ferrogrit Type 101, Wooster Products Inc.; FeralityType M-1, American Mason Safety Tread Co.; or equal as approved by theEngineer.

L. Grating:

1. Band all openings interrupting three or more bearing bars, and all gratingedges, with band bars having equivalent dimensions to bearing bars.

2. Hot-dip galvanize after fabrication.

3. Grating shall be free of warp, twist or other defects affecting appearance orserviceability.

4. Bar dimensions as shown on drawings.

M. Guard chain: ASTM A 413, Class Grade 28, 0.218" diameter, galvanized.

N. Epoxy adhesive anchors:

1. Anchor rods: Type 304 stainless steel.

2. All epoxy adhesive anchors shall be designed and installed per therequirements of ACI Appendix D as amended by ICC-ES AC308

3. Epoxy adhesive:

a. Epoxy-Tie High-Strength Adhesive (SET), by Simpson Strong-Tie.

b. Hilti HIT-RE-500 SD HSE 2421 by Hilti Corp.

c. Sikadur 31, manufactured by Sika Corporation. Local salesrepresentative at (510) 824-1664.

d. Or equal as approved by the Engineer.

0. Expansion type Anchor bolts: Threaded length to suit intended use. Nonstandardlengths may be required.

1. Acceptable products in concrete:

a. Strong-Bolt by Simpson Anchor Systems;

b. Kwik-Bolt TZ by Hilti Corp.;

c. Trubolt + (plus) WEDGE ANCHORS by ITW Red Head;

d. Or equal as approved by the Engineer.

2. Accepted products in CMU


a. Wedge-All by Simpson Anchor Systems

b. Kwik-Bolt 3 by Hilti Corp

c. Or equal as approved by the Engineer.

P. High Strength Anchor Bolts:

1. Bolts shall conform to ASTM A 490.

2. Nuts shall conform to ASTM A 194 and washers shall conform to ASTMF 436.

Q. Concrete inserts: Malleable iron, ASTM A 47; cast steel, ASTM A 27; or stainless.steel, ASTM A 297. Inserts shall be furnished with hot-dip galvanized steel orstainless steel bolts, shims, and washers.

PART 3 - EXECUTION

3.1 GENERAL REQUIREMENTS

A. Verify measurements at the job.

B. Perform all cutting, drilling, punching, threading and tapping required formiscellaneous metal or adjacent work.

C. Grind all sharp metal edges on items to be painted or coated. Edges shall berounded.

D. Expansion type anchor bolts shall only be used for static loads and shall not beloaded by vibrating or rotating equipment.

E. Welds:

1. Weld nonremovable connections in weldable materials unless noted otherwise.

2. Grind all rough weld beads. Welds exposed to view shall be uniformly neat.

3. Welds shall be abrasive blasted prior to galvanizing. All slag and other weldirregularities shall be removed prior to galvanizing.

F. Punch holes 1/16-inch larger than the nominal size of the bolts, unless otherwiseindicated. Whenever needed, because of the thickness of the metal, holes shall besubpunched and reamed or shall be drilled. Correct unmatching holes with newmaterial or new reaming at the Engineer's discretion. No drifting of bolts norenlargement of holes will be allowed to correct misalignment.


G. Protect dissimilar metals from galvanic corrosion by means of pressure tapes,coatings, or isolators as approved. Protect aluminum in contact with concrete orgrout with a heavy coat of mastic. See Section 33 10 01.

H. Stainless steel parts, assemblies, and equipment shall be thoroughly cleaned,descaled and passivated in accordance with ASTM A 380, Standard Practice forCleaning and Descaling and Passivation of Stainless Steel Parts, Equipment, andSystems. The method of passivation to used shall be submitted to the District forapproval.

I. After installation, clean damaged surfaces of shop coated metals and touch up withthe same material used for the shop coat. Clean damaged surfaces of galvanizedmetals and touch up with zinc-rich paint conforming to ASTM A 780.

J. Materials furnished that are in contact with drinking water shall be NSF 61approved for use with potable water.

3.2 INSPECTION

A. All materials and workmanship will be inspected for conformance to thesespecifications. Any work found deficient must be replaced and brought up to fullcompliance with these specifications.

B. See Section 01 45 27 for inspection advance notification requirements and Districttravel expenses

END OF SECTION
