Gateway Park Technical Specs Volume 1 (3)

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Gateway Park Center PERKINS+WILL 810495.000 12/06/18 AUTOMATIC VERTICALLY RETRACTABLE GLASS WALL 08 33 36 - 4 primary limit switch fail to act. This over torque sensor shall be mechanical, using the motor’s torque arm in it’s over torque detection. 4. The lifting equipment shall use the latest in industry standards in thermal protection, overload protection, quick acting fuses, etc., in order to ensure the safety and reliability of the system. 5. The operable wall shall be equipped with an optical sensor, which shall cut power to the lifting equipment if an object or person passes between the emitter(s) and receiver(s). The operable wall will then automatically reverse direction for approximately 3 seconds to clear the object. Regular operation of the operable wall shall resume once the key switch has been released and the obstruction removed. 2.3 PANEL CONSTRUCTION A. Panels shall be architecturally flat with no bowing, oil canning, warping, waviness or any other surface deformation and discontinuity. B. The operable wall shall be visibly flat and rigid in the down (closed) position. C. There shall be no exposed hinges, brackets and screws visible when the operable wall is in the down (closed) position. All of the panel edges shall be right angled, with a minimum radius not more than 1/16” (1.6mm). All of the panels shall be rectangular, nominally of the same size, unless requested otherwise by the architect. Horizontal joints between panels shall be no more than approximately ½” (12.7mm) wide. D. The operable wall with single laminated glass panels shall not weigh more than 7.5 lbs per square foot (36.6 Kg per square meters), not including the lifting equipment. E. A completely functioning operable wall, tested in full accordance and compliance with ASTM E90 (ISO 140-3), shall achieve, from an independent laboratory, a Sound Transmission Class (STC) rating (Rw value) of not less than System STC 33 (Rw 33). 2.4 FOLDING MECHANISM A. The hanging, folding and extension mechanism shall be, as much as possible, made from structural grade aluminum extrusions and structural shapes, in order to minimize the weight of the system. All wear surfaces, such as bushings, spacers, pins, discs, bearings, sleeves shall be designed to function quietly and with minimum wear, over the 10,000 cycle design life of the operable wall. The hangers, which fasten the lifting mechanism to the support steel, shall be fabricated from steel and shall be welded or bolted to the support steel supplied by others. 2.5 LIFTING EQUIPMENT A. The lifting equipment shall be sized properly so that it can open and close the wall effectively over the 10,000 cycle design life of the wall, at the minimum design speed of approximately 5 to 10 vertical feet per minute (1.5 to 3 meters per minute).