Rebar guide

Bar Markings

There are a number of ways to identify reinforcing bar (rebar) from the production mill to the fabrication shop to the jobsite. This documentation and marking system helps provide a wealth of useful information about the manufacturing and composition of each bar of reinforcing steel.

Each Individual Reinforcing Bar is Manufactured with a Series of Individual Markings:

  • The first letter or symbol identifies the producing mill.
  • The next marking is the bar size.*
  • The third marking symbol designates the type of reinforcing steel - usually either "S" for carbon-steel (ASTM A615) or "W" for low-alloy steel (ASTM A706).
  • Finally, there will be a grade marking (60, 75, 80, 100, 120) or by the addition of one line (60) or two lines (75), three lines (80, 100), or four lines (120) that must be at least five deformations long.

Resources from CRSI (Concrete Reinforcing Steel Institute)

 

CLICK HERE FOR Reinforcing Bar Marking Requirements Card (mm & in-lb)


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