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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 - 6 <br />3.4 INSTALLING STEEL FRAMING FOR WALLS AND PARTITIONS <br />A. Install runners (tracks) at floors, ceilings, and structural walls and columns where gypsum board stud <br />assemblies abut other construction. <br />1. Where studs are installed directly against exterior walls, install asphalt felt strips or foam gaskets <br />between studs and wall. <br />B. Installation Tolerances: Install each steel framing and furring member so that fastening surfaces do not <br />vary more than 1/8 inch from the plane formed by the faces of adjacent framing. <br />C. Extend partition framing full height to structural supports or substrates above suspended ceilings, except <br />where partitions are indicated to terminate at suspended ceilings. Continue framing over frames for doors <br />and openings and frame around ducts penetrating partitions above ceiling to provide support for gypsum <br />board. <br />1. Cut studs ½ inch short of full height to provide perimeter relief. <br />2. For STC-rated and fire-resistance-rated partitions that extend to the underside of floor/roof slabs <br />and decks or other continuous solid structural surfaces to obtain ratings, install framing around <br />structural and other members extending below floor/roof slabs and decks, as needed, to support <br />gypsum board closures needed to make partitions continuous from floor to underside of solid <br />structure. <br />D. Install steel studs and furring in sizes and at spacings indicated. <br />1. Single-Layer Construction: Space studs 16 inches o.c., unless otherwise indicated. <br />2. Multilayer Construction: Space studs 16 inches o.c., unless otherwise indicated. <br />E. Install steel studs so flanges point in the same direction and leading edge or end of each gypsum board <br />panel can be attached to open (unsupported) edges of stud flanges first. <br />F. For curved partitions, install steel framing as follows: <br />1. Cut top and bottom runners through leg and web at 2-inch intervals for arc length. In cutting <br />lengths of runners, allow for uncut straight lengths of not less than 12 inches at ends of arcs. <br />2. Bend runners to uniform curve of radius indicated and locate straight lengths so they are tangent to <br />arcs. <br />3. Support outside (cut) leg of runners by clinching a 1-inch- high-by-0.0209-inch- thick steel sheet <br />strip to inside of cut legs using metal lock fasteners. <br />4. Attach runners to structural elements at floor and ceiling with fasteners located 2 inches from ends <br />and spaced 24 inches o.c. <br />G. Frame door openings to comply with GA-219, and with applicable published recommendations of <br />gypsum board manufacturer, unless otherwise indicated. Attach vertical studs at jambs with screws either <br />directly to frames or to jamb anchor clips on door frames; install runner track section (for cripple studs) at <br />head and secure to jamb studs. <br />1. Install double 20-gage studs at each jamb, unless otherwise indicated. <br />2. Install cripple studs at head adjacent to each jamb stud, with a minimum ½-inch clearance from <br />jamb stud to allow for installation of control joint. <br />H. Frame openings other than door openings to comply with details indicated or, if none indicated, as <br />required for door openings. Install framing below sills of openings to match framing required above door <br />heads. <br />3.5 APPLYING AND FINISHING PANELS, GENERAL <br />A. Comply with ASTM C 840. <br />B. Install ceiling panels across framing to minimize the number of abutting end joints and to avoid abutting <br />end joints in central area of each ceiling. Stagger abutting end joints of adjacent panels not less than one <br />framing member. <br />C. Install sound-attenuation blankets, where indicated, prior to installing gypsum panels unless blankets are <br />readily installed after panels have been installed on one side. <br />D. Attach gypsum panels to steel studs so leading edge or end of each panel is attached to open <br />(unsupported) edges of stud flanges first. <br />E. Attach gypsum panels to framing provided at openings and cutouts. <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE