709.01 709-1 SECTION 709 REINFORCING STEEL AND WIRE ROPE
709.01 Reinforcing Steel. Reinforcing steel shall conform to the requirements of the following
specifications: Deformed and Plain Billet -Steel Bars for Concrete Reinforcement ASTM A615 Axle-steel Deformed and Plain Bars for Concrete Reinforcement ASTM A996 Low-Alloy Steel Deformed Bars for Concrete Reinforcement [to be Welded] ASTM A706 Fabricated Deformed Steel Bar Mats for Concrete Reinforcement ASTM A184 Steel Welded Wire Fabric, Plain for Concrete Reinforcement AASHTO M55 Steel Welded Wire Fabric, Deformed for Concrete Reinforcement AASHTO M 221 Epoxy Coated Reinforcing Bars ASTM A775 Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement ASTM A767 Deformed and Plain Stainless -steel Bars for Concrete Reinforcement ASTM A955 Deformed and Plain, Low -Carbon, Chromium, Steel Bars for Concrete Reinforcement ASTM A1035 Continuous Hot -Dip Galvanized Steel Bars for Concrete Reinforcement ASTM A1094 Unless otherwise design ated, bars conforming to ASTM A615 and ASTM A 996 shall be furnished in Grade 60. In ASTM A 184, bar material conforming to ASTM A616 will not be permitted. In ASTM A955, bar material shall be furnished in Grade 75 unless otherwise designated. In ASTM A1035, bar material of Type CL will not be permitted unless designated in the plans or otherwise approved by the Engineer.
709.02 Wire Rope. The wire rope shall conform to the requirements of AASHTO M 30 for the
specified diameter and strength class.
709.03 Dowel Bars and Tie Bars . Tie bars for longitudinal and transverse joints shall conform
to AASHTO A 775 and shall be grade 40, epoxy -coated, and deformed. Bar size shall be as designated on Standard Plan M -412-1. Dowel bars for transverse joints shall conform to AASHTO M 25 4 for the coating and to ASTM A615, grade 60 for the core material and shall be epoxy -coated, smooth, and lightly greased, precoated with wax or asphalt emulsion, or sprayed with an approved material for their full length. Bar size shall be as designated on the Standard Plan M -412-1. 709.03 709- 2 THIS PAGE INTENTIONALLY LEFT BLANK 710.01 710-1 SECTION 710 FENCE AND GUARDRAIL
710.01 Barbed Wire. Steel barbed wire shall confor m to the requirements of ASTM A121, Class
I.Aluminum barbed wire shall be manufactured per ASTM B 211 with alloy 5052- O for the line wire and alloy 5052 -H38 for the barbs.
710.02 Woven Wire. Woven wire shall conform to the details and requirements shown on the
plans and to the following: Zinc coated steel woven wire shall confor m to the requirements of ASTM A 116, coating Class I. Aluminum coated steel woven wire shall confor m to the requirements of ASTM A 116, Type A. Fittings and attachments shall be zinc coated to conform to the requirements of AASHTO M 232.
710.03 Chain Link Fabric . Chain link fabric and required fittings and hardware shall conform
to the requirements of AASHTO M 181 for the kind of metal, sizes of wire and mesh specified. Zinc coating for steel fabric shall conform to ASTM A 392, Class I; and aluminum coating for steel fabric to ASTM A 491, Class I.
710.04 Snow Fence . Wire -bound picket fence shall confor m to the requirements of ASTM F 537.
Posts shall conform to the requirements of AASHTO M 281.
710.05 “W” Beam Rail . The rail elements shall be corrugated sheet steel beams conforming to
the requirements of AASHTO M 180 of the designated class and type. The beams shall be galvanized, shop painted or corrosion resistant as may be specified. The same requirements shall apply to metal offset devices. Corrosion resistant steel for rail elements and terminals shall not be painted or galvanized. Corrosion resistant beam rails shall consist of corrugated sheet steel conforming to the requirements of AASHTO M 180, Type IV and shall have a corrosion resistance of at least 4 times that of carbon steel without copper (0.02 Max), or twice that of carbon steel with copper. The sheet steel may either be in coils or cut lengths when processed for corrugation. All corrosion resistant material shall be sandblasted to provide a uniform weathered appearance. All corrosion resistant steel parts shall be handled with care to avoid gouges, scratches, or dents. Care shall be exercised to keep foreign material such as paint, grease, oil, or crayon, from contact with the surface. Steel parts either damaged physically or by contact with foreign substances, will not be accepted. During shipment or site storage, corrosion resistant steel parts must be positioned to allow free drainage and air circulation on the surfaces. Natural oxide formation on the steel may occur and will not be considered objectionable. The Contractor shall furnish three copies of a certified mill test report to the Engineer . This report shall show the results of physical and chemical tests of the metal and its coating.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 867–868 of 943.