Labels:crt screen | dialog box | hakham | plant | windowpane OCR: Understanding the UL Fire Resistance Directories Three-layer systems: First layer- in. long for 1/2 in, in. thick panels. spaced 4 in Second laver- 1-5/8 long for in. 5/8 in. thick panels, spaced 24 in OC Third laver- 2-1/4 in. long for 1/2 thick panels OF 2-5/8 in. long for 5/8 in thick panels, spaced Screws offset min form laver below. Four-layer systems: First laver- in long for 1/2 in., 5/8 in. thick panels, spaced in Second laver- 1-5/8 in long for 1/2 in, 5/8 in thick panels spaced 24 in OC Third laver- 2-1/4 in. long for 1/ n thick panels 2-5/8 in long for 5/8 in. thick panels, spaced in OC Fourth laver- 2-51 in. long for thick panels iong for 5/8 in. thick panels spaced 12 in. OC Screws offset min 6 in from laver below Prev Next
