SCOPE
710.01.01 Material Covered. This specification covers the quality of structural steel.
REQUIREMENTS
710.02.01 Defects. Finished rolled material shall be free from cracks, flaws, injurious seams, laps, blisters,
ragged and imperfect edges, and other defects. It shall have a smooth, uniform finish and shall be straightened in the mill before shipment. Provide material free from loose mill scale, rust pits, or other defects affecting its strength or durability. Material will be rejected if deemed unsuitable for the purpose intended even though the material meets the requirements of the mill tolerances.
710.02.02 Charpy V -notch Test. Structural steel conforming to AASHTO M270 need not comply with the
Impact Testing Requirements unless designated on the plans as main load carrying members subject to tensile stress. Structural steel requiring Impact Testing shall meet the minimum requirements of Zone 2, unless otherwise shown on the plans. PHYSICAL PROPERTIES AND TESTS
710.03.01 Standard Steel. All steel for use in miscellaneous structures, unless otherwise noted, shall conform
to AASHTO M270 Grade 250 (36).
710.03.02 High Strength Low Alloy Columbium —Vanadium Steel. This steel shall conform to AASHTO
M270 Grade 345 (50), and shall be other than rimmed or capped steel.
710.03.03 High Strength Bolts. All bolts, nuts, washers, and Tension Control Bolts used in high- strength
connections shall conform to Article 11.3.2 of the AASHTO LRFD Bridge Construction Specifications, except as follows:
1.All nuts used with AASHTO M164 or ASTM A325 type 1 bolts shall conform to the requirements of ASTM A563 Grade DH or ASTM A194 Grade 2H. All nuts used with AASHTO M164 or ASTM A325 type 3 bolts shall conform to the requirements of ASTM A563 Grade DH3.
2.Tension Control Bolts shall be considered Alternative Fasteners as defined in Article 11.3.2.5 of the AASHTO LRFD Bridge Construction Specifications, and shall meet the requirements contained therein.
3.The Rotational Capacity T est will be performed on all bolt, nut, and washer assemblies as outlined in Article 11.5.6.4.2 of the AASHTO LRFD Bridge Construction Specifications and shall meet the requirements therein.
710.03.04 Stainless Steel Bolts. This steel shall conform to ASTM A276.
710.03.05 Welded Seamless Steel Pipe. This steel shall conform to ASTM A53, Type S, Grade B.
710.03.06 Cold -Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.
This steel shall conform to ASTM A500, Grade B.
710.03.07 Shear Stud Connectors. Shear stud connectors shall conform to Article 6.4.4 of the AASHTO LRFD
Bridge Design Specifications.
710.03.08 Pins and Rollers. This steel shall conform to Article 6.4.2 of the AASHTO LRFD Bridge Design
Specifications, except pin nuts shall conform to Subsection 710.03.01.
710.03.09 Bolts. All bolts, nuts, and washers not intended for high- strength connections shall conform to
ASTM A307. 710 STRUCTURAL STEEL
710.03.10 Structural Steel. Unless otherwise noted on the plans, all structural steel for use in main load
carrying members of bridge structures shall conform to AASHTO M270, Grade 345 (50). Bridge elements typically not considered as main load carrying members include: crossframes, diaphragms, wind bracing, stiffeners, gussett plates, bearing plates, and expansion assemblies.
710.03.11 High Strength Low Alloy Steel. This steel shall conform to AASHTO M270.
710.03.12 High -Yield -Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding. This
steel shall conform to AASHTO M270.
710.03.13 High -Yield -Strength Alloy Steel Plates, Quenched and Tempered for Pressure Vessels. This
steel shall conform to ASTM A517. SECTION 712 MISCELLANEOUS METAL SCOPE
712.01.01 Material Covered. This specification covers the type and quality of miscellaneous metals.
PHYSICAL PROPERTIES AND TESTS
712.03.01 Steel Castings. This steel shall conform to ASTM A27, Grade 450- 240 (Grade 65- 35).
712.03.02 Gray Iron Castings. These castings shall conform to ASTM A48, Class 275 (Class 40).
712.03.03 Malleable Castings. These castings shall conform to ASTM A47, Grade 22010 (Grade 32510).
712.03.04 Aluminum for Bridge Rail. Aluminum bridge rail shall conform to the following requirements:
a.Aluminum Alloy for Pipe. This pipe shall conform to ASTM B241 Alloy 6061- T6 or 6063- T6.
b.Aluminum Alloy Tubing. This tubing shall conform to ASTM B221 Alloy 6061- T6 or 6063- T6.
c.Cast Alu minum Alloy. This alloy shall conform to AASHTO M193.
d.Aluminum Alloy Shims. This alloy shall conform to ASTM B209 Alloy 1100- 0.
712.03.05 Bronze Castings. These castings shall conform to ASTM B22, Copper Alloy No. 863
(UNS No. C86300).
712.03.06 Welding Materials. Materials used for welding miscellaneous metals shall conform to
AWS D1.1/D1.1M .
712.03.07 Steel Piles. This steel (“H” Piles and Sheet Piling) shall conform to ASTM A36.
712.03.08 Steel for Pipe Piles. This steel shall conform to ASTM A252, Grade 2.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 549–550 of 610.