36C26118B0042-037.pdf

RENOVATE CANTEEN PLAZA VA Project No. 640-12-124P Palo Alto, CA VA Palo Alto Health Care System

STRUCTURAL STEEL FRAMING

05 12 00

SECTION 05 12 00

PART 1 - GENERAL

1.01 DESCRIPTION:

A. This section specifies structural steel shown and classified by Section 2, Code of Standard

Practice for Steel Buildings and Bridges.

1.02 RELATED WORK:

A. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY

SERVICES.

B. Painting:

1. Section 09 91 00, PAINTING

2. Section 05 05 13, FACTORY APPLIED COATING FOR METAL

1.03 QUALITY ASSURANCE:

A. Fabricator and erector shall maintain a program of quality assurance in conformance with Section

8, Code of Standard Practice for Steel Buildings and Bridges. Work shall be fabricated in an AISC certified Category Conventional Steel Structures fabrication plant.

B. Before authorizing the commencement of steel erection, the controlling contractor shall ensure that the steel erector is provided with the written notification required by 29 CFR 1926.752.

Provide copy of this notification to the Resident Engineer.

1.04 TOLERANCES:

A. Fabrication tolerances for structural steel shall be held within limits established by ASTM A6, by

Section 7, Code of Standard Practice for Buildings and Bridges, and by Standard Mill Practice -

General Information LRFD Manual, Second Edition, Page 1-183, except as follows:

1. Elevation tolerance for column splice points at time member is erected is 10 mm (3/8 inch).

2. Elevation tolerance for top surface of steel beams and girders at connections to columns at time floor is erected is 13 mm (1/2 inch).

1.05 REGULATORY REQUIREMENTS:

A. AISC: Specification for Structural Steel Buildings - LRFD Specification for Structural Steel

Buildings.

B. AISC: Code of Standard Practice for Steel Buildings and Bridges.

1.06 SUBMITTALS:

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES.

B. Shop and Erection Drawings: Complete

C. Certificates:

RENOVATE CANTEEN PLAZA VA Project No. 640-12-124P

1. Structural steel.

2. Steel for all connections.

3. Welding materials.

4. Shop coat primer paint.

D. Test Reports:

1. Welders' qualifying tests.

1.07 APPLICABLE PUBLICATIONS:

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text by basic designation only.

B. American Institute of Steel Construction (AISC):

1. Specification for Structural Steel Buildings - Allowable Stress Design and Plastic Design

(Second Edition, 2005)

2. Load and Resistance Factor Design Specification for Structural Steel Buildings (Second

Edition, 1995)

3. Code of Standard Practice for Steel Buildings and Bridges (2010).

C. American National Standards Institute (ANSI):

B18.22.1-65(R2008) .................. Plain Washers

B18.22M-81(R2000) .................. Metric Plain Washers

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

A6/A6M-09 ................................ Standard Specification for General Requirements for Rolled

Structural Steel Bars, Plates, Shapes, and Sheet Piling

A36/A36M-08 ............................ Standard Specification for Carbon Structural Steel

A53/A53M-10 ............................ Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless

A123/A123M-09 ........................ Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on

Iron and Steel Products

A242/A242M-04(R2009) ............ Standard Specification for High-Strength Low-Alloy Structural

Steel

A283/A283M-03(R2007) ............ Standard Specification for Low and Intermediate Tensile

Strength Carbon Steel Plates

A307-10 .................................... Standard Specification for Carbon Steel Bolts and Studs, 60,000 psi Tensile Strength

A325-10 .................................... Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

RENOVATE CANTEEN PLAZA VA Project No. 640-12-124P

A490-10 .................................... Standard Specification for Heat-Treated Steel Structural Bolts

150 ksi Minimum Tensile Strength

A500/A500M-10 ........................ Standard Specification for Cold Formed Welded and Seamless

Carbon Steel Structural Tubing in Rounds and Shapes

A572/A572M-07 ........................ Standard Specification for High-Strength Low-Alloy

Columbium-Vanadium Structural Steel

A992/A992M-06 ........................ Standard Specification for Structural Steel Shapes

E. American Welding Society (AWS):

D1.1/D1.1M-10.......................... Structural Welding Code-Steel

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

Specification for Structural Joints Using ASTM A325 or A490 Bolts

G. Military Specifications (Mil. Spec.):

MIL-P-21035 ............................. Paint, High Zinc Dust Content, Galvanizing, Repair

H. Occupational Safety and Health Administration (OSHA):

29 CFR Part 1926-2001 ............ Safety Standards for Steel Erection

PART 2 - PRODUCTS

2.01 MATERIALS:

A. Structural Wide Flange Shapes: A992.

B. Structural Channels: A36

C. Structural Tubing: ASTM A500, Grade B.

D. Steel Pipe: ASTM A53, Grade B.

E. Bolts, Nuts and Washers:

1. High-strength bolts, including nuts and washers: ASTM A325 2. Bolts and nuts, other than high-strength: ASTM A307, Grade A.

3. Plain washers, other than those in contact with high-strength bolt heads and nuts: ANSI

Standard B18.22.1.

F. Plates: A36 or A572 Gr 50 as noted on drawings

G. Zinc Coating: ASTM A123.

H. Galvanizing Repair Paint: Mil. Spec. MIL-P-21035.

RENOVATE CANTEEN PLAZA VA Project No. 640-12-124P

PART 3 - EXECUTION

3.01 CONNECTIONS (SHOP AND FIELD):

A. Welding: Welding in accordance with AWS D1.1. 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.

B. High-Strength Bolts: High-strength bolts tightened to a bolt tension not less than proof load given in Specification for Structural Joints Using ASTM A325 or A490 Bolts. Tightening done with properly calibrated wrenches, by turn-of-nut method or by use of direct tension indicators (bolts or washers). Tighten bolts in connections identified as slip-critical using Direct Tension Indicators or the turn-of-the-nut method. Twist-off torque bolts are not an acceptable alternate fastener for slip critical connections.

3.02 FABRICATION:

A. Fabrication in accordance with Chapter M, Specification for Steel Buildings - Load and

Resistance Factor Design.

3.03 SHOP PAINTING:

A. General: Shop paint steel with primer in accordance with Section 6, Code of Standard Practice for

Steel Buildings and Bridges.

B. Shop paint for steel surfaces is specified in Section 09 91 00, PAINTING.

C. Do not apply paint to following:

1. Surfaces within 50 mm (2 inches) of joints to be welded in field.

2. Surfaces which will be encased in concrete.

3. Surfaces which will receive sprayed on fireproofing.

4. Top flange of members which will have shear connector studs applied.

D. Zinc Coated (Hot Dip Galvanized) per ASTM A123 (after fabrication): Touch-up after erection:

Clean and wire brush any abraded and other spots worn through zinc coating, including threaded portions of bolts and welds and touch-up with galvanizing repair paint.

3.04 ERECTION:

A. General: Erection in accordance with Section 7, Code of Standard Practice for Steel Buildings and Bridges.

B. Temporary Supports: Temporary support of structural steel frames during erection in accordance with Section 7, Code of Standard Practice for Steel Buildings and Bridges.

3.05 FIELD PAINTING:

A. After erection, touch-up steel surfaces specified to be shop painted. After welding is completed, clean and prime areas not painted due to field welding.

B. Finish painting of steel surfaces is specified in Section 09 91 00, PAINTING.

RENOVATE CANTEEN PLAZA VA Project No. 640-12-124P

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