How to Tie Rebar Wires


Rebar, or reinforcing bar, is a metal framework that adds strength to concrete forms. It is installed before the concrete is poured. The size and type of rebar used depends on the application. Rebar is tied with wire to support it and hold it in place before pouring begins. For smaller jobs the rebar is tied manually with a twister rotary tying tool. For larger jobs an automatic tying tool is used. This reduces the likelihood of injury due to a repetitive action.

Things You'll Need

  • Twister rotary tying tool
  • Automatic rebar tying tool
  • Wire

Manual Tying Tool

  • Wrap the wire around the two pieces of rebar and cut it, leaving about 2 inches of extra wire on either end of the bar.

  • Grab the ends of the wire with the twister rotary tool's jaws and pull its handle. The handle extends out and twists the wire. (The same task can also be accomplished with a set of pliers, but the wire will have to be twisted by hand.)

  • Tighten the wire until it is snug.

Automatic Rebar Tying Tool

  • Adjust the torque dial on the tool to "0."

  • Turn the power switch to "on." Once the tool is turned on, do not place your hand near its rotating part.

  • Hold the tool at 45 degrees to the two perpendicular sections of rebar and place its "C" clamp around both bars.

  • Press the tool's trigger and hold it. The automatic rebar tying machine forces a wire around both bars, cuts it and twists it. Release the trigger after the twisting is finished. If the wire is too loose, increase the torque dial setting.

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