The shear reinforcing bars and main reinforcing bars are arranged across the prestressed composite girder.

The steel rods may be rebar.

This invention relates to a reinforcing bar coupler which could obtain a quick butt joint of the ends of the two reinforcing bars without turning either reinforcing bar nor the coupler.

The positioning wires adjacent to the free ends of the reinforcing bars are located from 200 to 500 mm away from the ends of the reinforcing bars.

For example, #3 rebar is 3/8-inch thick; #4 rebar is 1/2-inch thick; and #8 rebar is 1-inch thick.

The prestressed composite girder includes shear reinforcing bars and main reinforcing bars, sheaths, sole plates, and steel plates.

The reinforcing bar coupler includes a cover unit to cover reinforcing bars, and a locking bushing fitted over the cover unit to firmly couple the cover unit to the reinforcing bars.

The separation of the notches from each other corresponds to the planned separation of the reinforcing rods from each other.

The pair of the first segments is overlapped on the pair of butted reinforcing bars.

The top panel member (13) is provided with a plurality of spaced rebar punchouts (15).

The object of this invention is to provide a reinforcing bar coupling used to easily, simply, quickly and mechanically butt-joint two reinforcing bars to each other for use in reinforced concrete construction.

The tubular structure includes multiple support members and reinforcement bars.

So rebar with a #25 metric thickness grade is the equivalent of rebar with a #8 English thickness grade.

For rebar, one stick of rebar would be a unit, and you can find that with the formula A = 0.012n², where A is the area and n is the nominal size of the rebar.

A sliding type reinforcing bar coupling is provided for simply and firmly bonding a pair of butted reinforcing bars.