Labels:crt screen | dialog box | hakham | monitor | plant | windowpane OCR: Understanding the UL Fire Resistance Directories Ceiling Damper: Maximum nominal area 324 in. Maximum square size, In 11 18 in. Rectangular sizes not to exceed 324 in. with maximum width of 18 in. Maximum damper height Installed in accordance with the manu facturers installation instructions provided with the damper Maximum damper openings not exceed per 100 saft of ceiling area. Furring Channels: Resilient channels, 3/8 in deep by 3/8 in. wide at the base and 1-3/8 in. wide at the face formed from 0.020 in. thick galv steel, spaced Channels secured to each truss with 1/1-1 in long Type steel screws. Channels overlapped splices. Channels oriented opposite at wallboard butt joints (spaced OC shown 1n the above illustration. Prev Next sqft
