Section 709 — Reinforcing Steel and Wire Rope

709.01Reinforcing Steel.

(a)Reinforcing bars. Provide deformed, Grade 60 bars conforming to AASHTO M 31 or AASHTO M 322.

(b)Epoxy- coated reinforcing bars. Provide bars conforming to Subsection 709.01(a) . For epoxy- coated prefabricated reinforcing bars, conform to ASTM A934. For epoxy- coated reinforcing bars, conform to ASTM A775. Inspect the reinforcing bars after the near -white blast cleaning. Reject bars with steel slivers or scabs. Provide epoxy- coated reinforcing steel coated at a CRSI-certified epoxy coating plant.

(c)Corrosion- resistant steel reinforcing bars. Fabricate from one of the following:

(1)Stainless steel reinforcing bars, AASHTO M 334, UNS Designations: S24000, S30400, S31603, S31653, S31803, or S32304. (2) Low-carbon, chromium steel reinforcing bars, AASHTO M 334, Type 1035 CS.

(d)Tie bars. Provide deformed, Grade 60 bars conforming to AASHTO M 31.

(e)Hook bolts. Provide plain, Grade 60 bars conforming to AASHTO M 31 with M14 rolled threads or M16 cut threads. Provide a threaded sleeve nut that can sustain a minimum axial load of 15,000 pounds. (f) Dowel bars. Conform to AASHTO M 254, Type A or Type B. Use plain round bars, without burring or other deformation restricting free movement in the concrete. Paint one- half of the length of each dowel bar with one coat of tar paint. When the paint dries and immediately before placing the dowels, lubricate the painted end to prevent concrete from bonding to the painted end. For expansion joints, provide a dowel cap that snugly covers 2± ¼ inches of the dowel, has a closed end, and has a stop to hold the closed end 1 inch from the end of the dowel bar. Lubri cants for Type B dowels may be medium setting emulsified asphalt or flaked graphite. Lubricants are not required for Type A coated dowel bars. Provide dowel assemblies that hold dowel bars within ¼- inch tolerance vertically and horizontally during concrete placement and allow unrestricted movement of the pavement slab. Provide wire conforming to AASHTO M 336 for dowel assemblies. Coat dowel assemblies with the same material as the dowel bar. Recoat or repair damaged coatings equivalent to the manufacturer’s original coating. (g) Deformed steel wire. Conform to AASHTO M 336.

(h)Steel welded wire reinforcement, plain, for concrete. Conform to AASHTO M 336.

(i)Cold -drawn steel wire. Conform to AASHTO M 336.

(j)Welded deformed steel wire reinforcement . Conform to AASHTO M 336.

(k)Fabricated deformed steel bar or rod mats. Conform to AASHTO M 54.

(l)Low alloy steel deformed bars. Conform to ASTM A706.

709.02Prestressing Steel. Conform to the following:

(a)Low-relaxation, uncoated seven-wire steel strand, AASHTO M 203, Grade 270;

(b)High -strength steel bars, AASHTO M 275, Type II; or

(c)Stress -relieved steel wire, AASHTO M 204, Type BA or Type WA.

709.03Wire Rope. Provide IWRC or equivalent, EIP stranded steel 6 x 19 or 7 x 19 wire ropes conforming to ASTM A1023.