UL 14B:2008 pdf download – Sliding Hardware for Standard, Horizontally Mounted Tin-Clad Fire Doors

UL 14B:2008 pdf download – Sliding Hardware for Standard, Horizontally Mounted Tin-Clad Fire Doors. 9 Stay Rolls 9.1 A stay roll, Type No. 1, for a three-ply tin-clad door shall be a U-shaped member and shall be made ot flat-rolled...