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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />AUTOMATIC VERTICALLY RETRACTABLE GLASS WALL <br />08 33 36 - 5 <br /> <br /> <br />B. The lifting mechanism shall be designed to function as smoothly, quietly and safely as <br />possible. Wherever possible, ball bearings shall be used instead of bushings and wear <br />surfaces. Chain or belt drive systems are not acceptable. <br />C. There shall be a wire rope cable for every set of lifting mechanisms. This cable shall <br />be of 6 x 31 construction aircraft cable and shall be made of galvanized steel. The <br />diameter of the cables shall be sized so that they shall be able to hold the entire <br />weight of the wall, with the appropriate safety factor. <br />D. The power drive shall be sized to deliver sufficient amount of torque to safely and <br />effectively raise and lower the operable wall over its design life. <br />2.6 FINISHES <br />A. Panels: Acoustical panels shall be single glazed laminated glass, 7/16” (11mm) thick <br />nominal. <br />B. Framework: Manufacturer’s standard silver metallic. <br />C. Sound seals: Black. <br />2.7 SOUND SEALS <br />A. The operable wall shall automatically and acoustically seal against the floor without <br />the need for any manual intervention. The floor seals shall leave a joint between the <br />floor and the bottom acoustical panels of not more than approximately 2” (51 mm). <br />B. The operable wall shall seal to the wall track with brush seals and leave a joint <br />between the lifting mechanism and the track of no more than approximately 3/4” (19 <br />mm). <br />C. The operable wall shall automatically and acoustically seal against the ceiling without <br />any manual intervention. The top seals shall leave a joint between the top acoustical <br />panels and the ceiling of the pocket of not more than approximately <br />2” (51 mm). <br />PART 3 - EXECUTION <br />3.1 PREPARATION <br />A. Preparation of opening shall be by general contractor. Any deviation of site conditions <br />contrary to approved shop drawings shall be called to the attention of the architect. <br />3.2 DELIVERY AND STORAGE <br />A. Delivery to the job site shall be coordinated by general contractor. Proper storage of <br />the operable walls before installation and continued protection during and after <br />installation shall be the responsibility of the general contractor. The operable wall