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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />0 c 1� f .` l I l I: \ a r k 1 1 016121 <br />A. General: Install acoustical panel ceilings to comply with ASTM C 636 and seismic design <br />requirements indicated, per manufacturer's written instructions and CISCA's "Ceiling Systems <br />Handbook." <br />B. Suspend ceiling hangers from building's structural members and as follows: <br />1. Install hangers plumb and free from contact with insulation or other objects within ceiling <br />plenum that are not part of supporting structure or of ceiling suspension system. <br />2. Splay hangers only where required to miss obstructions; offset resulting horizontal forces <br />by bracing, countersplaying, or other equally effective means. <br />3. Where width of ducts and other construction within ceiling plenum produces hanger <br />spacings that interfere with location of hangers at spacings required to support standard <br />suspension system members, install supplemental suspension members and hangers in <br />form of trapezes or equivalent devices. <br />4. Secure wire hangers to ceiling suspension members and to supports above with a <br />minimum of three tight turns. Connect hangers directly either to structures or to inserts, <br />eye screws, or other devices that are secure and appropriate for substrate and that will not <br />deteriorate or otherwise fail due to age, corrosion, or elevated temperatures. <br />5. Do not support ceilings directly from permanent metal forms or floor deck. Fasten <br />hangers to cast -in -place hanger inserts, postinstalled mechanical or adhesive anchors, or <br />power - actuated fasteners that extend through forms into concrete. <br />6. When steel framing does not permit installation of hanger wires at spacing required, <br />install carrying channels or other supplemental support for attachment of hanger wires. <br />7. Do not attach hangers to steel deck tabs. <br />8. Do not attach hangers to steel roof deck. Attach hangers to structural members. <br />9. Space hangers not more than 48 inches (1200 mm) o.c. along each member supported <br />directly from hangers, unless otherwise indicated; provide hangers not more than 8 inches <br />(200 mm) from ends of each member. <br />10. Size supplemental suspension members and hangers to support ceiling loads within <br />performance limits established by referenced standards and publications. <br />C. Secure bracing wires to ceiling suspension members and to supports with a minimum of four <br />tight turns. Suspend bracing from building's structural members as required for hangers, <br />without attaching to permanent metal forms, steel deck, or steel deck tabs. Fasten bracing wires <br />into concrete with cast -in -place or postinstalled anchors. <br />D. Install edge moldings and trim of type indicated at perimeter of acoustical ceiling area and <br />where necessary to conceal edges of acoustical panels. <br />1. Apply acoustical sealant in a continuous ribbon concealed on back of vertical legs of <br />moldings before they are installed. <br />2. Screw attach moldings to substrate at intervals not more than 16 inches (400 mm) o.c. <br />and not more than 3 inches (75 mm) from ends, leveling with ceiling suspension system <br />to a tolerance of 1/8 inch in 12 feet (3.2 mm in 3.6 m). Miter corners accurately and <br />connect securely. <br />3. Do not use exposed fasteners, including pop rivets, on moldings and trim. <br />ACOUSTICAL PANEL CEILINGS 095113-6 <br />