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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 - 7 <br /> <br /> <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine areas and substrates including welded hollow-metal frames and support <br />framing, with Installer present, for compliance with requirements and other <br />conditions affecting performance of the Work. <br />B. Examine panels before installation. Reject panels that are wet, moisture damaged, <br />and mold damaged. <br />C. Proceed with installation only after unsatisfactory conditions have been corrected. <br />3.2 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 <br />and to avoid abutting end joints in central area of each ceiling. Stagger abutting <br />end joints of adjacent panels not less than one framing member. <br />C. Install panels with face side out. Butt panels together for a light contact at edges <br />and ends with not more than 1/16 inch of open space between panels. Do not force <br />into place. <br />D. Locate edge and end joints over supports, except in ceiling applicati ons where <br />intermediate supports or gypsum board back-blocking is provided behind end <br />joints. Do not place tapered edges against cut edges or ends. Stagger vertical joints <br />on opposite sides of partitions. Do not make joints other than control joints at <br />corners of framed openings. <br />E. Form control and expansion joints with space between edges of adjoining gypsum <br />panels. <br />F. Cover both faces of support framing with gypsum panels in concealed spaces <br />(above ceilings, etc.), except in chases braced internally. <br />1. Unless concealed application is indicated or required for sound, fire, air, or <br />smoke ratings, coverage may be accomplished with scraps of not less than 8 <br />sq. ft. in area. <br />2. Fit gypsum panels around ducts, pipes, and conduits. <br />3. Where partitions intersect structural members projecting below underside of <br />floor/roof slabs and decks, cut gypsum panels to fit profile formed by <br />structural members; allow 1/4- to 3/8-inch- wide joints to install sealant. <br />G. Isolate perimeter of gypsum board applied to non-load-bearing partitions at <br />structural abutments. Provide 1/4- to 1/2-inch- wide spaces at these locations and <br />trim edges with edge trim where edges of panels are exposed. Seal joints between <br />edges and abutting structural surfaces with acoustical sealant.