Allied Bolt

STRUCTURAL TENSION CONTROL (TC) BOLTS

A TENSION CONTROL BOLT(TC BOLT) is a heavy duty plain steel bolt used in steel frame construction. The head is usually domed and is not designed to be driven. The end of the shank has a spline on it which is engaged by a special power wrench which prevents the bolt from turning while the nut is tightened. When the appropriate torque is reached the spline shears off.