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DocuSign Envelope ID:D561B1AE-DF34-4907-AD06-AOEB37BBE427 <br /> CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12,2020 <br /> 308 WEST FRANKLIN,CHAPEL HILL,NC <br /> E. Form control and expansion joints with space between edges of adjoining gypsum panels. <br /> F. Cover both faces of support framing with gypsum panels in concealed spaces (above ceilings, <br /> etc.), except in chases braced internally. <br /> 1. Unless concealed application is indicated or required for sound, fire, air, or smoke <br /> ratings, coverage may be accomplished with scraps of not less than 8 sq. ft. (0.7 sq. m) in <br /> area. <br /> 2. Fit gypsum panels around ducts,pipes, and conduits. <br /> 3. Where partitions intersect structural members projecting below underside of floor/roof <br /> slabs and decks, cut gypsum panels to fit profile formed by structural members; allow <br /> 1/4-to 3/8-inch- (6.4-to 9.5-mm-)wide joints to install sealant. <br /> G. Isolate perimeter of gypsum board applied to non-load-bearing partitions at structural <br /> abutments, except floors. Provide 1/4- to 1/2-inch- (6.4- to 12.7-mm-) wide spaces at these <br /> locations, and trim edges with edge trim where edges of panels are exposed. Seal joints <br /> between edges and abutting structural surfaces with acoustical sealant. <br /> H. Attachment to Steel Framing: Attach panels so leading edge or end of each panel is attached to <br /> open(unsupported) edges of stud flanges first. <br /> I. Wood Framing: Install gypsum panels over wood framing, with floating internal corner <br /> construction. Do not attach gypsum panels across the flat grain of wide-dimension lumber, <br /> including floor joists and headers. Float gypsum panels over these members, or provide control <br /> joints to counteract wood shrinkage. <br /> J. STC-Rated Assemblies: Seal construction at perimeters, behind control joints, and at openings <br /> and penetrations with a continuous bead of acoustical sealant. Install acoustical sealant at both <br /> faces of partitions at perimeters and through penetrations. Comply with ASTM C 919 and with <br /> manufacturer's written recommendations for locating edge trim and closing off sound-flanking <br /> paths around or through assemblies,including sealing partitions above acoustical ceilings. <br /> 3.3 APPLYING INTERIOR GYPSUM BOARD <br /> A. Install interior gypsum board in the following locations: <br /> 1. Regular Type: As indicated on Drawings. <br /> 2. Type X: Where required for fire-resistance-rated assembly. <br /> 3. Ceiling Type: Ceiling surfaces. <br /> 4. High-Impact Type: As indicated in these specifications above.. <br /> 5. Moisture-and Mold-Resistant Type: [As indicated on Drawings] <Insert requirements>. <br /> B. Single-Layer Application: <br /> 1. On ceilings, apply gypsum panels before wall/partition board application to greatest <br /> extent possible and at right angles to framing,unless otherwise indicated. <br /> 2. On partitions/walls, apply gypsum panels [vertically (parallel to framing)] [horizontally <br /> (perpendicular to framing)], unless otherwise indicated or required by fire-resistance- <br /> rated assembly, and minimize end joints. <br /> GYPSUM BOARD 092900 - 6 <br />