36C25622R0094 051200 Structural Steel Framing .docx

REPLACE AHU #104 AND DUCTWORK BLDG. 7

DEPARTMENT OF VETERANS AFFAIRS HEALTH CARE SYSTEM-ALEXANDRIA, LA

PROJECT NO.: 502-19-107

SECTION 05 12 00

STRUCTURAL STEEL FRAMING

GENERAL

SUMMARY

Section Includes:

Structural steel shapes, plates, and bars.

Structural pipe.

Bolts, nuts, and washers.

RELATED REQUIREMENTS

Materials Testing and Inspection During Construction: Section 01 45 29, TESTING LABORATORY SERVICES.

Steel Decking: Section 05 31 00, STEEL DECKING.

Steel Finishes: Section 09 06 00, SCHEDULE FOR FINISHES.

Painting: Section 09 91 00, PAINTING.

APPLICABLE PUBLICATIONS

Comply with references to extent specified in this section.

American Institute of Steel Construction (AISC):

AISC Manual - Steel Construction Manual, 14th Ed.

30310 - Code of Structural Steel Buildings and Bridges.

36010: Specification for Structural Steel Buildings.

The American Society of Mechanical Engineers (ASME):

B18.22.109 - Washers: Helical SpringLock, Tooth Lock, and Plain Washers.

American Welding Society (AWS):

D1.1/D1.1M15 - Structural Welding Code - Steel.

ASTM International (ASTM):

A6/A6M14 - General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling.

A36/A36M14 - Carbon Structural Steel.

A123/A123M15 - Zinc (HotDip Galvanized) Coatings on Iron and Steel Products.

A32514 - Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength.

A500/A500M13 - ColdFormed Welded and Seamless Carbon Steel Structural Tubing and Rounds and Shapes.

A992/A992M15 - Structural Shapes.

Master Painters Institute (MPI):

No. 18 - Primer, Zinc Rich, Organic.

Military Specifications (Mil. Spec.):

MILP21035 - Paint, High Zinc Dust Content, Galvanizing, Repair.

Occupational Safety and Health Administration (OSHA):

29 CFR 1926.752(e) - Guidelines For Establishing The Components Of A SiteSpecific Erection Plan.

29 CFR 19262001 - Safety Standards for Steel Erection.

Research Council on Structural Connections (RCSC) of The Engineering Foundation:

Specification for Structural Joints Using ASTM A325 or A490 Bolts.

SUBMITTALS

Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Submittal Drawings:

Show size, configuration, and fabrication and installation details.

Erection Drawings:

Provide erection drawings showing verified field dimensions.

Submit for record purposes. Indicate the sequence of erection, temporary shoring and bracing. The erection drawings must conform to AISC 303. The erection drawings shall include all field dimensions. Clearly note any field conditions that differ from the contract documents.

Fabrication Drawing Requirements:

Submit fabrication drawings for approval prior to fabrication. Prepare in accordance with AISC 326 and AISC 325. Fabrication drawings must not be reproductions of contract drawings. Include complete information for the fabrication and erection of the structure’s components, including the location, type, and size of bolts, welds, member sizes and lengths, connection details, blocks, copes, and cuts. Use AWS A2.4 standard welding symbols.

Sustainable Construction Submittals:

Recycled Content: Identify postconsumer and preconsumer recycled content percentage by weight.

Test Reports: Certify products comply with specifications.

Welders' qualifying tests.

Certificates: Certify each product complies with specifications.

Structural steel.

Steel connections.

Welding materials.

Shop coat primer paint.

Qualifications: Substantiate qualifications comply with specifications.

Fabricator.

Installer.

Welders and welding procedures.

Record Surveys: Signed and sealed by responsible surveyor or engineer.

QUALITY ASSURANCE

Fabricator Qualifications: AISC Quality Certification participant designated as AISC Certified Plant, Category STD.

Regularly fabricates specified products.

Fabricated specified products with satisfactory service on five similar installations for minimum five years.

Installer Qualifications: AISC Quality Certification Program participant designated as AISCCertified Erector, Category ACSE.

Regularly installs specified products.

Installed specified products with satisfactory service on five similar installations for minimum five years.

Before commencement of Work, ensure steel erector provides written notification required by OSHA 29 CFR 1926.752(e). Submit a copy of the notification to Contracting Officer's Representative.

Welders and Welding Procedures Qualifications: AWS D1.1/D1.1M.

WARRANTY

Construction Warranty: FAR clause 52.24621, "Warranty of Construction."

PRODUCTS

MATERIALS

WShapes:

ASTM A992/A992M.

Channel and Angles:

ASTM A36/A36M.

Plates and Bars:

ASTM A36/A36M.

Hollow Structural Sections:

ASTM A500/A500M.

Bolts, Nuts and Washers: Galvanized for galvanized framing and plain finish for other framing.

Highstrength bolts, including nuts and washers: ASTM A325.

Plain washers, other than those in contact with highstrength bolt heads and nuts: ASME B18.22.1.

Welding Materials: AWS D1.1, type to suit application.

PRODUCTS - GENERAL

Basis of Design: Section 09 06 00, SCHEDULE FOR FINISHES.

Sustainable Construction Requirements:

Steel Recycled Content: 30 percent total recycled content, minimum.

Low PollutantEmitting Materials: Comply with VOC limits specified in Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS for the following products:

Paints and coatings.

FABRICATION

Fabricate structural steel according to Chapter M, AISC 360.

Shop and Field Connections:

Weld connections according to AWS D1.1/D1.1M. Welds shall be made only by welders and welding operators who have been previously qualified by tests as prescribed in AWS D1.1 to perform type of work required.

HighStrength Bolts: Highstrength bolts tightened to a bolt tension minimum 70 percent of their minimum tensile strength. Tightening done with properly calibrated wrenches, by turnofnut method or by use of direct tension indicators (bolts or washers). Tighten bolts in connections identified as slipcritical using Direct Tension Indicators. Twistoff torque bolts are not an acceptable alternate fastener for slip critical connections.

FINISHES

Shop Priming:

Prime paint structural steel according to AISC 303, Section 6.

Interstitial Space Structural Steel: Prime paint, unless indicated to receive sprayed on fireproofing.

Shop Finish Painting: Apply primer and finish paint as specified in Section 09 91 00, PAINTING.

Do not paint:

Surfaces within (2 inches) of field welded joints.

Surfaces indicated to be encased in concrete.

Surfaces receiving sprayed on fireproofing.

Beam top flanges receiving shear connector studs applied.

Structural Steel Galvanizing: ASTM A123/A123M, hot dipped, after fabrication. Touchup after erection: Clean and wire brush any abraded and other spots worn through zinc coating, including threaded portions of bolts and welds and touchup with galvanizing repair paint.

Galvanize structural steel framing installed at exterior locations.

Bolts, Nuts, and Washers Galvanizing: ASTM F2329, hotdipped.

ACCESSORIES

General: Shop paint steel according to AISC 303, Section 6.

Finish Paint System: Primer and finish as specified in Section 09 91 00, PAINTING.

Galvanizing Repair Paint: MPI No. 18.

EXECUTION

ERECTION

Erect structural steel according to AISC 303 and AISC 360.

Set structural steel accurately at locations and elevations indicated on drawings.

Maintain erection tolerances of structural steel within AISC 303 requirements.

Pour Stop Elevation Tolerance: 1/4 inch, maximum, before concrete placement.

Weld and bolt connections as specified for shop connections.

FIELD PAINTING

After welding, clean, and prime weld areas to match adjacent finish.

Touchup primer damaged by construction operations.

Apply galvanizing repair paint to galvanized coatings damaged by construction operations.

Finish Painting: As specified in Section 09 91 00, PAINTING.

FIELD QUALITY CONTROL

Record Survey:

Measure and record structural steel framing plumbness, level, and alignment after completing bolting and welding and before installation of work supported by structural steel.

Identify deviations from allowable tolerances specified in AISC Manual.

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