If we have a 4 hr. UL approved design then that means our products have been exposed to 2000 F.
Largest DWV (drain waste & vent) for concrete and gypsum wallboard assemblies is 2 in. - We can do up to 3 in. DWV PVC in wood framed chase wall assemblies.
Yes – RS offers two trainings twice a year at the corporate in which the contractor receives a “Recognition of Training” document. We do not certify. FM & UL can certify a contractor. Contractors c...