AASHTO LRFD specs invite Grade 100 reinforcement

MMFX-II

The 2013 Interim Revisions of the American Association of State Highway and Transportation Officials Load and Resistance Factor Design (LRFD) Bridge Design Specifications allow reinforced concrete bridges to be designed using high-strength reinforcing steels up to a 100 ksi yield, such as MMFX2 (AASHTO MP18/ASTM A1035 Grade 100 [690 MPa]). 

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CRSI recommends return to inch-pound markings

Source: Concrete Reinforcing Steel Institute, Schaumburg, Ill.

At a meeting on November 9, the CRSI Board of Directors urged all producer members to revert to an inch-pound bar marking system for all sizes and grades of deformed reinforcing steel products. CRSI members produce more than 90 percent of domestic reinforcing steel.

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