10 Easy Facts About  Tension Control Bolts - - Atlantic Hardware Supply Described

A tension control bolt (TC bolt) is a sturdy bolt used in steel frame construction. The head is normally domed and is not created to be driven. Completion of the shank has a spline on it which is engaged by a special power wrench which avoids the bolt from turning while the nut is tightened up.

A tension control bolt is a pre-assembled bolt, nut, and washer used especially in steel frame construction. Also called a TC bolt, they have a domed head rather than a hex head since they are installed from a spline on their other end. This spline gets in touch with an unique power wrench for setup.

Tension control bolts come completely pre-lubricated by the producer. They are ready to be set up with a shear wrench. This wrench has an inner and an external socket. The inner socket turns the spline clockwise and the outer socket rotates the nut counterclockwise. As soon as the correct tension has been attained, the spline breaks off.

The Best Strategy To Use For Tension Control Bolts - Hawaii Nut and Bolt

There is just one lot number involved in the stress control bolt assembly and they come specifically lubed. They are managed by the AISC, American Institute of Steel Building, and RCSC, Research Study Council on Structural Connections. The single most unique function of the tension control bolt is that it is set up with a precisely adjusted shear wrench that takes the guesswork out of achieving the right preload (stress developed in a fastener when it is tightened).

Many feel that tension control bolts are more cost-effective since they require just one person for their setup and evaluation. Therefore, installation goes faster and with fewer errors. Stress control bolts must follow requirements noted by the RCSC, as mentioned before and any deterioration of the lubricant on the bolt will trigger it to fail examination.

Galvanized bolts have a more long lasting lube on them as compared to the water soluble lube on the plain bolts, however you still should save them correctly too. If something happens to your stress control bolts out in the field, you can not just re-lubricate them yourself. They need to be returned to the manufacturer for them to make the restorative steps and retest them.