SECTION 223—STEEL REINFORCEMENT
223.01 Description
These specifications cover steel items designed to give added flexural strength to hydraulic cement concrete or to control and reduce cracking in such applications.
223.02 Detail Requirements
a.Reinforcement:
1.Deformed bars shall conform to ASTM A615, Grade 40 or 60. Longitudinal bars for continuous reinforced hydraulic cement concrete pavement shall be Grade 60. 222.01
2.Plain bars shall conform to ASTM A615, Grade 40 or 60, deformation waived. When used as a dowel, material may be a plain bar conforming to the requirements of ASTM A615, Grade 40 or 60, or a plain dowel conforming to the requirements of ASTM A709, Grade 36.
3.Welded wire fabric shall conform ASTM A185. When used in continuously reinforced hydraulic cement concrete pavement wire fabric shall be deformed, furnished in flat sheets, and shall conform to ASTM A497, high yield of 70,000 pounds per square inch.
4.Structural steel shall conform to Section 226.
5.Bar mats shall conform to ASTM A184.
6.Spiral wire shall conform to AASHTO M32 or ASTM A82.
7.Wire mesh for use in gabions shall be made of galvanized steel wire at least 0.105 inch, 12 gage, in diameter. The tensile strength of the wire shall be at least 60,000 pounds per square inch. Wire mesh shall be galvanized in accordance with ASTM A641, Class 3. When PVC coating is specified, it shall be at least 0.015 inch in thickness and shall be black. Wire shall be welded to form rectangular openings or twisted to form hexagonal openings of uniform size. The linear dimension of the openings shall be not more than 4 1/2 inches. The area of the opening shall be not more than 9 square inches. The unit shall be nonraveling. Nonraveling is defined as the ability to resist pulling apart at any of the twists or connections forming the mesh when a single wire strand in a section is cut.
b.Prestressing Tendons shall be seven-wire stress-relieved strands, stress-relieved wire, and low- relaxation strands shall conforming to ASTM A416, Grade 270; ASTM A421; and ASTM A416, Supplement I, respectively, with the following modifications:
1.Strands or wires used in units of any one-bed layout shall be manufactured by the same plant.
2.A manufacturer’ s certification and load-elongation curve in accordance with ASTM A416 or ASTM A421 shall be obtained by the prestressed concrete fabricator for each lot of strand planned for use in fabrication. The strand or wire manufacturer shall submit the data in permanent record form to the Engineer for approval prior to fabrication.
c.Reinforcing Steel to Be Epoxy Coated: Steel shall conform to the requirements herein and shall be coated in accordance with AASHTO A775.
1.Plants that epoxy coat reinforcing steel shall be CRSI certified for epoxy coating. CRSI inspection reports shall be on file at the plant and shall be available to the Engineer for review.
2.Handling and storage of the coated bars shall conform to AASHTO A775.
3.Visible damage to the epoxy coating shall be patched or repaired with materials compatible with the existing coating in accordance with AASHTO A775.
d.Reinforcing Steel to Be Galvanized: Steel shall conform to the requirements herein and shall be galvanized in accordance with ASTM A767. 223.02
Referenced in this section
Steel Reinforcement in other states
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Source: Road and Bridge Specifications, 2020 Edition. Pages 248–249 of 1,065. View official source ↗