U356 RESIC-1 vs Isomax STC and OITC
Isomax product requires 2 layers of 5/8" gypsum board to achieve the same 1 hour fire rating as the RSIC-1 clips on this system with only one layer of gypsum board on the clip side.
See UL Fire Resistive Design U356 http://www.pac-intl.com/fire_ratings_list.html
|