AASHTO M 322M/M 322-10
This specification covers rail-steel and axle-steel bars for concrete reinforcement. Three types ofproduct are included, designated with a rail symbol and an R for bars made of rail-steel andwith an A for bars made of axle-steel. The standard sizes and dimensions of deformed bars andtheir number designations are given in Table 1. All sizes and grades of all types may not be readilyavailable; manufacturers should be consulted to verify availability.