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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />ACOUSTICAL PANEL CEILINGS <br /> 09 51 13 - 2 <br /> <br /> <br />2.3 METAL SUSPENSION SYSTEM <br />A. Metal Suspension-System Standard: Manufacturer's standard, direct-hung, metal <br />suspension system and accessories according to ASTM C 635/C 635M. <br />B. ACP-1 and 3, Wide-Face, Capped, Double-Web, Steel Suspension System: Main and <br />cross runners roll formed from cold-rolled steel sheet; prepainted, electrolytically <br />zinc coated, or hot-dip galvanized, G30 coating designation; with prefinished <br />15/16-inch- wide metal caps on flanges. <br />1. Structural Classification: Intermediate-duty system. <br />2. End Condition of Cross Runners: Override (stepped) or butt-edge type. <br />3. Face Design: Flat, flush. <br />4. Cap Material: Cold-rolled steel. <br />5. Cap Finish: Painted white. <br />C. ACP-2, Wide-Face, Aluminum-Capped, Double-Web, Hot-Dip Galvanized, G60, Steel <br />Suspension System: Main and cross runners roll formed from cold -rolled steel <br />sheet; hot-dip galvanized, G60 coating designation; with prefinished, 15/16-inch- <br />wide aluminum caps on flanges. <br />1. Structural Classification: Intermediate-duty system. <br />2. Face Design: Flat, flush. <br />3. Cap Finish: Painted white. <br />2.4 ACCESSORIES <br />A. Attachment Devices: Size for five times the design load indicated in <br />ASTM C 635/C 635M, Table 1, "Direct Hung," unless otherwise indicated. Comply <br />with seismic design requirements. <br />2.5 METAL EDGE MOLDINGS AND TRIM <br />A. Roll-Formed, Sheet-Metal Edge Moldings and Trim: Type and profile indicated or, if <br />not indicated, manufacturer's standard moldings for edges and penetrations that <br />comply with seismic design requirements; formed from sheet metal of same <br />material, finish, and color as that used for exposed flanges of suspension -system <br />runners. <br />PART 3 - EXECUTION <br />3.1 PREPARATION <br />A. Measure each ceiling area and establish layout of acoustical panels to balance <br />border widths at opposite edges of each ceiling. Avoid using less-than-half-width <br />panels at borders unless otherwise indicated. <br />B. Layout openings for penetrations centered on the penetrating items.