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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />GYPSUM BOARD <br /> 09 29 00 - 8 <br /> <br /> <br />H. Attachment to Steel Framing: Attach panels so leading edge or end of each p anel is <br />attached to open (unsupported) edges of stud flanges first. <br />I. STC-Rated Assemblies: Seal construction at perimeters, behind control joints, and <br />at openings and penetrations with a continuous bead of acoustical sealant. Install <br />acoustical sealant at both faces of partitions at perimeters and through <br />penetrations. Comply with ASTM C 919 and with manufacturer's written instructions <br />for locating edge trim and closing off sound-flanking paths around or through <br />assemblies, including sealing partitions above acoustical ceilings. <br />J. Install sound attenuation blankets before installing gypsum panels unless blankets <br />are readily installed after panels have been installed on one side. <br />3.3 APPLYING INTERIOR GYPSUM BOARD <br />A. Install interior gypsum board in the following locations: <br />1. Type X: Vertical surfaces unless otherwise indicated. <br />2. Ceiling Type: Ceiling surfaces. <br />3. Impact-Resistant Type: As indicated on Drawings. <br />4. Mold-Resistant Type: Interior face of exterior walls and where shown. <br />5. Glass-Mat Gypsum Sheathing Board: Exterior soffits. <br />B. Single-Layer Application: <br />1. On ceilings, apply gypsum panels before wall/partition board application to <br />greatest extent possible and at right angles to framing unless otherwise <br />indicated. <br />2. On partitions/walls, apply gypsum panels horizontally (perpendicular to <br />framing) unless otherwise indicated or required by fire-resistance-rated <br />assembly, and minimize end joints. <br />a. Stagger abutting end joints not less than one framing member in <br />alternate courses of panels. <br />b. At stairwells and other high walls, install panels horizontally unless <br />otherwise indicated or required by fire-resistance-rated assembly. <br />3. On Z-shaped furring members, apply gypsum panels vertically (parallel to <br />framing) with no end joints. Locate edge joints over furring members. <br />4. Fastening Methods: Apply gypsum panels to supports with steel drill screws. <br />C. Multilayer Application: <br />1. On ceilings, apply gypsum board indicated for base layers before applying <br />base layers on walls/partitions; apply face layers in same sequence. Apply <br />base layers at right angles to framing members and offset face-layer joints <br />one framing member, 16 inches minimum, from parallel base-layer joints, <br />unless otherwise indicated or required by fire-resistance-rated assembly. <br />2. On partitions/walls, apply gypsum board indicated for base layers and face <br />layers vertically (parallel to framing) with joints of base layers located over <br />stud or furring member and face-layer joints offset at least one stud or furring