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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />NON-STRUCTURAL METAL FRAMING <br /> 09 22 16 - 7 <br /> <br /> <br />B. Isolate suspension systems from building structure where they abut or are <br />penetrated by building structure to prevent transfer of loading imposed by <br />structural movement. <br />C. Suspend hangers from building structure as follows: <br />1. Install hangers plumb and free from contact with insulation or other objects <br />within ceiling plenum that are not part of supporting structural or suspension <br />system. <br />a. Splay hangers only where required to miss obstructions and offset <br />resulting horizontal forces by bracing, countersplaying, or other equally <br />effective means. <br />2. Where width of ducts and other construction within ceiling plenum produces <br />hanger spacings that interfere with locations of hangers required to support <br />standard suspension system members, install supplemental suspension <br />members and hangers in the form of trapezes or equivalent devices. <br />a. Size supplemental suspension members and hangers to support ceiling <br />loads within performance limits established by referenced installation <br />standards. <br />3. Wire Hangers: Secure by looping and wire tying, either directly to structures <br />or to inserts, eye screws, or other devices and fasteners that are secure and <br />appropriate for substrate, and in a manner that will not cause hangers to <br />deteriorate or otherwise fail. <br />4. Do not connect or suspend steel framing from ducts, pipes, or conduit. <br />D. Fire-Resistance-Rated Assemblies: Wire tie furring channels to supports. <br />E. Grid Suspension Systems: Attach perimeter wall track or angle where grid <br />suspension systems meet vertical surfaces. Mechanically join main beam and cross - <br />furring members to each other and butt-cut to fit into wall track. <br />F. Installation Tolerances: Install suspension systems that are level to within 1/8 inch <br />in 12 feet measured lengthwise on each member that will receive finishes and <br />transversely between parallel members that will receive finishes. <br />END OF SECTION