CEMCO FAS Strap is a flat strap with 2 strips of 1/2″ to 1-1/4″ intumescent. FAS Strap is installed continuous and parallel with the flutes and provides firestopping within the flute void while eliminating mineral wool and providing continuous backing for wall framing. This strap is fabricated from hot-dipped galvanized steel complying with ASTM A653, and ASTM A1003 Grade 33 Type H for 33 ksi yield strength steel for 20 gauge (33 mils) with a minimum G40 coating complying with ASTM A924, with a minimum G60 coating complying with ASTM A924; and Grade 50 Type H for 50 ksi yield strength steel for 16 gauge (54 mils) with a minimum G60 coating complying with ASTM A924. The FAS STRAP is listed under Underwriters Laboratories for one and two hour head of wall fire rated wall assemblies.