threaded rod couplers

Does anyone know if threaded rod couplers, say ½” to ½”, are manufactured to an ASTM standard as are bolts and nuts? What assurances are there that the couplers will generate the full tensile design strength of the threaded rod (A36, A307)? Are couplers proprietary items that require the manufacturer’s certification or warranty? What grade of steel are they fabricated from?

Thanks.

 

Christopher Banbury, PE

President

 

Ark Engineering, Inc.

PO Box 10129, Brooksville, FL 34603

22 North Broad ST, Brooksville, FL 34601

Phone: (352) 754-2424

Fax: (352) 754-2412

www.arkengineering.net