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THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 092216-7 <br /> <br />1. Space 8-gage hanger wires 48" o.c. along carrying channels and within 6" of ends <br />of carrying channel runs. In concrete, anchor hangers by attachment to reinforcing <br />steel, by loops embedded at least 2" or by approved inserts. For steel construction, <br />wrap hanger around or through beams or joists. <br /> <br />2. Install 1-1/2" carrying channels 48" o.c. or spaced as tested for fire rated <br />construction, and extend within 6" of walls. Position channels for the correct ceiling <br />height, level, and secure with hanger wire saddle tied along channels. Provide 1" <br />clearance between runners and abutting walls and partitions. At channel splices, <br />interlock flanges, overlap ends 12” and secure each end with double strand 18- <br />gage wire. <br /> <br />3. Attachment of suspension wires to structural elements: <br /> <br />a. Metal decks: Double-wrap-tie each hanger suspension wire to a 16 inch <br />length of No. 4 (1/2 inch dia.) steel reinforcing bar and drop wire through <br />accurately spaced drilled or punched holes in metal decking. Align length <br />of reinforcing bars across flutes of decking. <br />b. Concrete slabs: Install looped or pigtail (corkscrew) type hanger <br />suspension wires through accurately spaced drilled holes in slab formwork. <br />Assure that loop or pigtail is standing vertical before concrete is placed. <br /> <br />4. Erect furring channels at right angles to 1-1/2" carrying channels. Space furring <br />within 6" of walls. Provide 1" clearance between furring ends and abutting walls <br />and partitions. Attach furring channels to 1-1/2" channels with furring channel clips <br />equal to products of USG, installed on alternate sides of the carrying channel. <br />Saddle tie furring to channels with double strand 18-gage wire when clips cannot <br />be alternated. At splices, nest furring channels with at least 8" overlap and securely <br />tie each end with double strand 18 gage tie wire. <br /> <br />5. When required in fire rated assemblies, install double furring channels to support <br />gypsum panel ends and back-block with gypsum board strip. When staggered end <br />joints are not required, control joints may be used. <br /> <br />6. At light troffers or openings that interrupt the carrying or furring channels, install <br />additional cross reinforcing to restore the lateral stability of the grillage with 3/4" <br />cold rolled channels wire tied a top and parallel to main runner channel. <br /> <br />7. Light Fixture Protection: Use over recessed lighting fixtures installed in direct <br />suspension grid when required in fire rated construction. Cut 5/8" fire rated <br />gypsum wallboard panels in pieces to form a five-sided enclosure, trapezoidal in <br />cross section. Fabricate box larger than the fixture to provide at least 1/2" <br />clearance between wallboard and fixture. <br /> <br />8. Brace suspended soffits, ceilings, and the like, against uplift wind action as <br />required by local Building Code, with diagonal supports at not more than 4'-0" o.c. <br />each way. <br />