723.06 Reinforcing Steel
726 721.04 FLANGE CHANNEL POSTS Provide new galvanized flange channel posts of the size shown on the Plans and in accordance with ASTM A709, Grade 36. Galvanize posts in accordance with AASHTO M 111 after cutting, punching, or drilling holes.
723.01 Bar Steel Reinforcem Ent — Billet Steel
Provide plain or deformed billet steel bars for concrete reinforcement and dowels in accordance with AASHTO M 31 or M 322, Grade 60 [420], except, provide deformed billet steel bars for bent tie bars used in concrete paving in accordance with AASHTO M 31 or M 322, Grade 40 [280].
723.02 Welded Steel Wire Fa Bric
Provide cold drawn steel wire fabric for concrete reinforceme nt in accordance with AASHTO M 55 or AASHTO M 221. Provide the wire size and spacing as shown on the Plans. Provide reinforcing fabric in flat sheets or rolls. Straighten bent or distorted materials before use. Ensure the fabric is free of excessive rus t, scale, or coating that may impair the concrete bond.
723.03 Steel Wire Strand Fo R Prestressing
Provide steel wire strands for prestressing in accordance with AASHTO M 203, Grade 270 [1860], for low-relaxation and stress -relieved (normal -relaxation). Pr ovide low -relaxation strand in accordance with the supplementary requirements in AASHTO M 203.
723.04 Bars for Posttension Ing
Provide high strength alloy steel bars in accordance with AASHTO M 275.
723.05 Posttensioning Steel Wire
Provide steel wire strand s for post -tensioning in accordance with AASHTO M 204, Type BA or Type WA. If required by the Contract, provide low -relaxation wire in accordance with the supplementary requirements in AASHTO M 204.
723.06 Anchorages for Post -Tensioned Tendons
Provide anch orages for post -tensioned tendons with the following characteristics: Capable of de -tensioning or re -tensioning prestressing steel at any time before grouting. Capable of distributing the load from the anchoring device to the concrete using devices approve d by the Resident Engineer. STRUCTURAL S TEEL 724.01 727 Capable of developing the ultimate tendon strength required by the Contract without exceeding anticipated set. Ensure bending stresses in the plates or assemblies induced by the pull of the prestressing steel do not exceed the m aterial yield point. Ensure anchoring device parts are at least 2 in [50 mm] inside the member final end surfaces.
723.07 Cold Drawn Steel Wir E
Provide cold drawn plain steel wire, in accordance with AASHTO M 32, for spiral ties and other reinforcing shown on the Plans as “W” (Wire) sizes. Provide cold drawn deformed steel wire, in accordance with AASHTO M 225, for reinforcing shown on the Plans as “D” (Wire) sizes.
723.08 Epoxy Coated Reinfor Cing Bars
Provide epoxy coated (an electro -statically applied or ganic coating) reinforcing bars and epoxy coating material in accordance with ASTM A775, except for the following: Provide reinforcing steel bars in accordance with Subsection 723.01, “Bar Steel Reinforcement — (Billet Steel).” Provide finished epoxy coating in a color and tone that easily gives visual indications of holidays, damage, or corrosion staining. SECTION 724 STRUCTURAL STEEL
724.01 Structural Steel
Provide steel grades as required by the Contract. If the structural steel grade is not specified by the Contract, provide high strength, low alloy structural steel in accordance with ASTM A 709/A709M, Grade 50W [345W]. Provide steel for main load -carrying member components in accordance with the Charpy V-Notch (CVN) Impact Test requirements of ASTM A 709/A709M for Zone 2. Components subject to the CVN requirements include, but are not limited to, the following: Flanges and webs of welded plate girders, Rolled beams, Cover pl ates, Stiffeners (longitudinal, intermediate, or bearing), Diaphragm and cross -frame components in curved girder bridges, Connection plates for main load -carrying components (such as splice plates and filler plates over ¼ in [6 mm] thick), and Steel welded to any of these components. Steel components not subject to CVN requirements include: Shoes, Diaphragm and cross -frame components in straight girder bridges,