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yQQ EL <br /> U W � LL <br /> 1 .5 QUALITY ASSURANCE : <br /> A. Installation Design Criteria : Perform gypsum board systems work in accordance with t"_' - <br /> requirements of ASTM C475, C7541 C840, C9551 C1396, GA-216 , GA-600 , and <br /> selected UL Fire Resistance Designs except as otherwise specified in this Section <br /> B. Regulatory Requirements: <br /> 1 . Fire-rated Assemblies: Listed , labeled , and rated by Underwriter's Laboratories , <br /> Inc. , Factory Mutual, or fire resistance ratings listed in GA-600. <br /> 2. Fire-Hazard Classification: Listed and labeled by UL, FM, or GA. <br /> 1 . 6 COORDINATION : <br /> A. Pnor to and during installation, coordinate with work of other trades. <br /> B. Verify installation of all blocking , backing , and additional studwork is complete . <br /> 1 .7 DELIVERY, STORAGE AND HANDLING : <br /> A. Deliver material and store off floor in dry area to prevent damage due to moisture or <br /> excessive handling. <br /> PART PRODUCTS LL <br /> 2. 1 MANUFACTURERS : <br /> A. Products listed are items manufactured by U .S . Gypsum Co. and are listed as a <br /> standard of quality. <br /> B . Equivalent products of following manufacturers are acceptable. <br /> 1 . National Gypsum Co. <br /> 2. American Gypsum <br /> 3 . Georgia-Pacific Corp . <br /> 2.2 MATERIALS : <br /> A. Freestanding Furring Channels: USG metal stud channel , 1 ? " deep, roll-formed <br /> sections of 20-ga . galvanized steel , ASTM C645. <br /> B. Miscellaneous Furring and Accessories : USG resilient furring channels , ? " DWC <br /> furring ( hat-type) channels , 1 " Z-furring , angles , %", 1 %", and 3" cold rolled steel <br /> channels , 8 ga . hanger wire, 18 ga . tie wire, pre-formed clips and ties. <br /> C. Gypsum Wallboard (General and above 8 feet AFF): ? " thick, tapered edge, fire rated <br /> Type X . (Note: At radius walls the Contractor has the option to install Y<" and/or ? " thick <br /> gypsum wallboard in layers , provided the installation is permitted by the designated fire <br /> rated design , if any. ) <br /> D. Gypsum Wallboard ( Corridors up to 8 feet AFF minimum ): Hi abuse brand, ? " thick, <br /> ASTM C36, tapered edge , fire rated Type X. (Note: At radius walls the Contractor has <br /> the option to install Y4" and/or ? " thick gypsum wallboard in layers , provided the <br /> installation is permitted by the designated fire rated design , if any. ) <br /> E_ Water Resistant Gypsum Wallboard ( MR Green Board): ? " thick, tapered edge. <br /> Provide at all "wet" areas (areas subject to contact with water), whether shown or not <br /> shown , except where prohibited by fire rated designs. <br /> F . Exterior Gypsum Soffit Board : Standard or Fire Rated type, tapered edges , ends <br /> square cut, ASTM C931 . <br /> G . Gypsum Backing Board : Standard or Fire Rated type, square edges , ASTM C442. <br /> Indian River County Administration Complex 09250 - 2 <br /> DAA Project No . 2102 <br /> S + A Project No. 03106 <br />