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Indian River County Courthouse Renovations <br />100% CD Submittal PGAL Project No. R1002627.00 <br />1.10 FIELD CONDITIONS <br />A. Environmental Limitations: Do not install acoustical panel ceilings until spaces are <br />enclosed and weatherproof, wet work in spaces is complete and dry, work above <br />ceilings is complete, and ambient temperature and humidity conditions are maintained <br />at the levels indicated for Project when occupied for its intended use. <br />1. Pressurized Plenums:Operate ventilation system for not Tess than 48 hours <br />before beginning acoustical panel ceiling installation. <br />PART2-PRODUCTS <br />2.1 PERFORMANCE REQUIREMENTS <br />A. Surface -Burning Characteristics: Comply with ASTM E 84; testing by a qualified <br />testing agency. Identify products with appropriate markings of applicable testing <br />agency. <br />1. Flame -Spread Index: Comply with ASTM E 1264 for Class A materials. <br />2. Smoke -Developed Index: 50 or less. <br />2.2 ACOUSTICAL PANELS, GENERAL <br />A. Low -Emitting Materials: Acoustical panel ceilings shall comply with the testing and <br />product requirements of the California Department of Health Services' "Standard <br />Practice for the Testing of Volatile Organic Emissions from Various Sources Using <br />Small -Scale Environmental Chambers." <br />B. Source Limitations: <br />1. Acoustical Ceiling Panel: Obtain each type from single source from single <br />manufacturer. <br />2. Suspension System: Obtain each type from single source from single <br />manufacturer. <br />C. Source Limitations: Obtain each type of acoustical ceiling panel and supporting <br />suspension system from single source from single manufacturer. <br />D. Recycled Content: Postconsumer recycled content plus one-half of preconsumer <br />recycled content not Tess than 50 percent. <br />E. Glass -Fiber -Based Panels: Made with binder containing no urea formaldehyde. <br />F. Acoustical Panel Standard: Provide manufacturer's standard panels of configuration <br />indicated that comply with ASTM E 1264 classifications as designated by types, <br />patterns, acoustical ratings, and light reflectances unless otherwise indicated. <br />May 1,2018 <br />095113 Acoustical Panel Ceilings 100% Construction Documents <br />Page 3of10 <br />