712Miscellaneous Metal

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:

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.

SECTION 713 REINFORCEMENT SCOPE

713.01.01 Materials Covered. This specification covers the quality of bar steel, welded wire reinforcement , and

prestressing steel . PHYSICAL PROPERTIES AND TESTS

713.03.01 Bar Steel Reinforcement. This steel shall conform to the applicable following requirements:

Deformed Billet -Steel Bars for Concrete Reinforcement .......................................................... AASHTO M31, Grade 300 (40) or 420 (60) Low Alloy Steel Deformed and Plain Bars for Concrete Reinforcement ................................ ................................ .................. ASTM A706 Spiral /Welded Hoop Reinforcement ................................ ....................................................................................................... ASTM A706 Unless specified otherwise, use reinforcement conforming to AASHTO M31 or ASTM A706. Reinforcing steel bars for longitudinal bars in columns and for welded applications shall conform to ASTM A706. Generally, reinforcement bars for minor structures, sign and signal foundations, and concrete barrier rails may conform to AASHTO M31. Spiral or hoop reinforcement in columns and piles may be furnished deformed or plain. Reinforcing steel bars failing to meet the minimum unit stress when calculated on the basis of AASHTO M31 or ASTM A706 may be considered acceptable if minimum specification requirements are satisfied by computing the “Section Area” method described in Test Method No. Nev. T484. Furnish 3 copies of certified mill test results for each heat of steel supplied to the project. Additionally furnish two 750 mm (30 in.) samples of each size per heat for testing. Field samples may also be tested from “extra” bars as required in Subsection 505.02.02.

713.03.02 Welded Wire Reinforcement. This steel shall conform to ASTM A1064.

713.03.0 3 Prestressing Steel. Prestressing steel shall be high tensile wire conforming to AASHTO M204,

including all supplementary requirements; high tensile seven wire strand conforming to AASHTO M203; or uncoated high- strength steel bars conforming to AASHTO M275, including all supplementary requirements. The maximum mass requirement of AASHTO M275 will not apply. In addition to the requirements of AASHTO M275, for deformed bars, the reduction of area shall be det ermined from a bar from which the deformations have been removed. The bar shall be machined no more than necessary to remove the deformations over a length of 300 mm (12 in.), and reduction will be based on the area of the machined portion. Use the same grade bars in any individual member, unless otherwise permitted. When bars are to be extended by the use of couplers, the assembled units shall have a tensile strength of not less than the manufacturer’s minimum guaranteed ultimate tensile strength of the bars. Failure of any one sample to meet this requirement will be cause for rejection of the heat of bars and lot of couplers. Place couplers at approved locations. Straighten wires if necessary to produce equal stress in all wires or wire groups or parall el lay cables that are to be stressed simultaneously or when necessary to insure proper positioning in the ducts. Sampling and testing shall conform to AASHTO M203 and AASHTO M204 and as specified below. Assign all bars of each size from each mill heat, all wire from each coil, and all strand from each manufactured reel to be shipped to the site an individual lot number and tag in such a manner that each such lot can be accurately identified at the jobsite. Likewise identify each lot of anchorage assembli es and bar couplers to be installed at the site. Submit records identifying assigned lot numbers with the heat, or reel of material represented. All unidentified prestressing steel, anchorage assemblies or bar couplers received at the site will be rejected.