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DSS Skills Development Center Smith Sinnett / 2020045 <br />Chapel Hill, North Carolina Orange County <br /> <br />GYPSUM BOARD 09 29 00 - 5 <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine areas and substrates, with Installer present, and including welded hollow-metal frames and <br />framing, for compliance with requirements and other conditions affecting performance. <br />B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold damaged. <br />C. Proceed with installation only after unsatisfactory conditions have been corrected. <br />3.2 INSTALLING STEEL FRAMING GENERAL <br />A. Steel Framing Installation Standard: Install steel framing to comply with ASTM C 754 and with <br />ASTM C 840 requirements that apply to framing installation. <br />B. Install supplementary framing, blocking, and bracing at terminations in gypsum board assemblies to <br />support fixtures, equipment services, heavy trim, grab bars, toilet accessories, furnishings, or similar <br />construction. Comply with details indicated and with recommendations of gypsum board manufacturer <br />or, if none available, with United States Gypsum Co.'s "Gypsum Construction Handbook." <br />C. Do not bridge building control and expansion joints with steel framing or furring members. <br />Independently frame both sides of joints with framing or furring members as indicated. <br />3.3 INSTALLING STEEL FRAMING FOR SUSPENDED AND FURRED CEILINGS <br />A. Suspend ceiling hangers from building structural members and as follows: <br />1. Install hangers plumb and free from contact with insulation or other objects within ceiling plenum <br />that are not part of supporting structural or ceiling suspension system. Splay hangers only where <br />required to miss obstructions and offset resulting horizontal forces by bracing, counters playing, or <br />other equally effective means. <br />2. Where width of ducts and other construction within ceiling plenum produces hanger spacings that <br />interfere with the location of hangers required to support standard suspension system members, <br />install supplemental suspension members and hangers in form of trapezes or equivalent devices. <br />Size supplemental suspension members and hangers to support ceiling loads within performance <br />limits established by referenced standards. <br />3. Secure wire hangers by looping and wire-tying, either directly to structures or to inserts, eye <br />screws, or other devices and fasteners that are secure and appropriate for substrate, and in a <br />manner that will not cause them to deteriorate or otherwise fail. <br />4. Secure flat, angle, and rod hangers to structure, including intermediate framing members, by <br />attaching to inserts, eye screws, or other devices and fasteners that are secure and appropriate for <br />structure as well as for type of hanger involved, and in a manner that will not cause them to <br />deteriorate or otherwise fail. <br />5. Do not attach hangers to steel roof deck. Attach hangers to structural members. <br />6. Do not connect or suspend steel framing from ducts, pipes, or conduit. <br />B. Sway-brace suspended steel framing with hangers used for support. <br />C. Install suspended steel framing components in sizes and at spacings indicated, but not less than that <br />required by the referenced steel framing installation standard. <br />1. Wire Hangers: 48 inches o.c. <br />2. Carrying Channels (Main Runners): 48 inches o.c. <br />3. Furring Channels (Furring Members): 16 inches o.c. <br />D. Installation Tolerances: Install steel framing components for suspended ceilings so that cross-furring or <br />grid suspension members are level to within 1/8 inch in 12 feet (3 mm in 3.6 m) as measured both <br />lengthwise on each member and transversely between parallel members. <br />E. Wire-tie or clip furring members to main runners and to other structural supports as indicated. <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE