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<br /> <br />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 095100-4 <br /> <br />1. Install suspension systems to comply with ASTM C 636, with hangers <br />supported only from building structural members. Locate hangers not less than 6 <br />in. from each end and spaced 4 ft. along each carrying channel or direct-hung <br />runner, unless otherwise indicated, leveling to tolerance of 1/8 in. in 12 ft. <br />2. Install hangers plumb and free from contact with insulation or other objects <br />within ceiling plenum which are not part of supporting structural or ceiling <br />suspension system. <br /> <br />C. Suspension Wires: <br /> <br />1. Space suspension wires 48 in. o.c. maximum. <br /> <br />2. Attachment to structural elements: <br />a. Metal decks: Double-wrap-tie each hanger suspension wire to a 16 in. <br />length of No. 4 (1/2 in. dia.) steel reinforcing bar and drop wire through <br />accurately spaced drilled or punched holes in metal decking. Align <br />length 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 <br />formwork. Assure that loop or pigtail is standing vertical before concrete <br />is placed. <br />c. Wood framing: Double-wrap preformed eyelet type suspension wires <br />around framing members and secure with a 10d nail through each eyelet, <br />or, double- wrap straight wires around framing members and tie with <br />three twists of wire around itself. <br /> <br />3. Do not make local kinks or bends in hanging wires as a means of leveling main <br />carrying members. <br /> <br />4. At carrying channels, tightly form loops to prevent any vertical movement or rotation <br />of carrying member within the loops. <br /> <br />5. At main runners, sharply bend and tightly wrap wires to prevent downward <br />movement or slippage when ceiling loads are imposed. <br /> <br />6. Do not hang suspension wires more than 1 in 6 out of plumb unless counter- <br />sloping wires are provided. <br /> <br />7. Do not attach to or bend wires around interfering material such as duct work. <br /> <br />8. Use trapeze suspension or equivalent devices where obstructions interfere with direct <br />suspension. <br /> <br />a. Trapeze suspension construction: Minimum, back-to-back 1-1/2 in. cold- <br />formed channels for spans up to 6ft. <br /> <br />D. Exposed Grid System: <br /> <br />1. Space main tee members at 24 in. o.c. for acoustical lay-in panels. <br /> <br />2. Support main tee members by hanger wires at 48 in. o.c. maximum. Secure wire <br />thru tee with a double wrap and three twists.