Labels:crt screen | dialog box | hakham | plant | windowpane | workwear OCR: Understanding the UL Fire Resistance Directories Numbering System for Fire Rated Assemblies Membrane protection 000- 099 100-199 200 299 300-399 400-499 500-599 "Next you look at the protection you will put over the structural element or group of construction The first option Membrane Protection This 1S protection that 1S put on top ofor mec hanically fastened to the structural element much like drywall is fastened to steel studs Examp les are concealed grid or exposed grid systems, gypsum, metal lath and or plaster These numbers fall between 000 and 599 Prev Next
