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Indian River County Courthouse Renovations <br />100% CD Submittal PGAL Project No. R1002627.00 <br />1. Mounting Method for Measuring NRC: Type E-400; plenum mounting in which <br />face of test specimen is 15-3/4 inches away from test surface according to <br />ASTM E 795. <br />G. Acoustical Panel Colors and Patterns: Match appearance characteristics indicated for <br />each product type. <br />1. Where appearance characteristics of acoustical panels are indicated by <br />referencing pattern designations in ASTM E 1264 and not manufacturers' <br />proprietary product designations, provide products selected by Architect from <br />each manufacturer's full range that comply with requirements indicated for type, <br />pattern, color, light reflectance, acoustical performance, edge detail, and size. <br />2.3 ACOUSTICAL PANELS <br />A. Basis -of -Design Product: Subject to compliance with requirements, provide product <br />indicated on Drawings or comparable product by one of the following: <br />1. Armstrong World Industries, Inc. <br />2. CertainTeed Corp. <br />3. Chicago Metallic Corporation. <br />4. Tectum Inc. <br />5. USG Interiors, Inc.; Subsidiary of USG Corporation. <br />B. Color: White. <br />C. LR: Not less than 0.80. <br />D. NRC: Not less than 0.55 <br />E. CAC: Not less than 30. <br />F. Edge/Joint Detail: Beveled Tegular. <br />G. Thickness: 5/8 inch minimum. <br />H. Modular Size: As indicated in the finish schedule and drawings <br />I. Broad Spectrum Antimicrobial Fungicide and Bactericide Treatment: Provide <br />acoustical panels treated with manufacturer's standard antimicrobial formulation that <br />inhibits fungus, mold, mildew, and gram -positive and gram-negative bacteria and <br />showing no mold, mildew, or bacterial growth when tested according to ASTM D 3273 <br />and evaluated according to ASTM D 3274 or ASTM G 21. <br />2.4 METAL SUSPENSION SYSTEMS, GENERAL <br />A. Recycled Content: Postconsumer recycled content plus one-half of preconsumer <br />recycled content not less than 25 percent. <br />May 1,2018 <br />095113 Acoustical Panel Ceilings 100% Construction Documents <br />Page 4 of 10 <br />