Development Length of High Strength Coil Rods in Concrete

[astructurale]

Does anyone know how to specify the length of a coil rod embedded in concrete to develop the full strength of the rod? There are charts for re-bar, of course, but is there a similar calculation for coil rods?

 

[techmaximus]

Coil rod? Is that the same as threaded rod? I know Hilti has a chart for embed on epoxy of threaded rods.

Techmaximus

 

[astructurale]

Thank you, techmaximus for your post. Coil rod is not the same as threaded rod. Threaded rod has NC threads, and the the threads on coil rods are bigger. Coil rod is used with heavy hex nuts, etc. I believe that coil rod is also a higher strength steel.

I do not know if those epoxy charts work for both. I have seen them in Hilti and the Red Head catalogs.

I'd still like to know an answer if anyone knows one, or if you happen to find out later, techmaximus.

 

[blake989]

coil rod has a yield stress in the neighborhood of 110,000psi at 1/2" diameter. I have never seen development length info for the rod itself, but I do know that there are many types of inserts available that are embeded into the concrete that the rod is then threaded into. Check meadow-burke.