05120Steel.doc

SECTION 05120

STRUCTURAL STEEL

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes structural steel.

B. This section provides for fabrication and erection of steel components for modifying safety railings and installing handrails on Scott Tower Fire Lookout.

1.2 submittals

A. Product Data: For each type of product indicated.

B. Shop Drawings: Show fabrication of steel components.

1. Verify all field dimensions as indicated on the drawings. Note all revised dimensions on the shop drawings.

1.3 quality assurance

A. Welding: Qualify procedures and personnel according to AWS D1.1, “Structural Welding Code—Steel.”

B. Comply with applicable provisions of AISC’s “Code of Standard Practice for Steel Buildings and Bridges.”

part 2 - PRODUCTS

1.4 STRUCTURAL-STEEL MATERIALS

A. Structural-Steel Shapes, and Bars: ASTM A 36/A 36M, Carbon Steel

B. Channels, Angles, M, S-Shapes: ASTM A 36/A 36M.

C. Cold-Formed Structural-Steel Tubing; ASTM A 500, Grade B.

D. Steel Pipe: ASTM A 53, Type E or S, Grade B.

E. Bolts, Nuts, and Washer: ASTM A 307, Grade A.

F. Welding Electrodes: Comply with AWS requirements.

G. Galvanizing: ASTM 123 for steel and ASTM A153 for hardware.

H. Galvanizing Repair Paint: SSPC-Paint 20 or DOD-P-21035.

1.5 FABRICATION

A. Structural Steel: Fabricate and assemble in shop to greatest extent possible. Fabricate according to AISC's "Code of Standard Practice for Steel Buildings and Bridges".

B. Install drain holes as needed for galvanizing.

1.6 SHOP CONNECTIONS

spec writer: Retain first paragraph and subparagraph below for high-strength bolts.

A. Weld Connections: Comply with AWS D1.1 for welding procedure specifications, tolerances, appearance, and quality of welds and for methods used in correcting welding work.

1.7 Galvanizing

A. Galvanize all steel components and hardware after shop fabrication.

spec writer: Retain, revise, or delete five subparagraphs below to suit Project.

part 3 - EXECUTION

1.8 ERECTION

A. Install steel accurately in locations indicated.

1.9 FIELD CONNECTIONS

A. High-Strength Bolts: Shop install high-strength bolts according to RCSC's "Specification for Structural Joints Using ASTM A 325 or A 490 Bolts" for type of bolt and type of joint specified.

1. Joint Type: Snug tightened.

B. Galvanizing Repairs: Prepare and repair field cuts, drill holes, grindings, and other damaged galvanized coatings with galvanized repair paint according to ASTM A 780 and manufacturer's written instructions.

END OF SECTION 05120

05120 - 1

STRUCTURAL STEEL