A. Design Requirements: Rapid roll-up doors must be able to withstand a wind pressure of 20 pounds per square foot (psf) of door area. Rapid roll-up door must provide a near-airtight seal and knock-away feature for easy reassembly upon impact. After accidental impact, door must be capable of reset from ground level without the use of ladders, tools or lift equipment. Rapid roll-up doors must be automatic closing, upward coiling, interlocking rolled slat, curtain type. Rapid roll-up doors must include the following: 1) Motor operated, vertically opening, rapid roll-up type. 2) Designed for high cycle use on exterior openings. 3) Springless type, operated by electric power with auxiliary hand chain operation. 4) Complete with guides, hardware, fastenings, operating mechanisms and accessories. 5) Surface mounted type with guides at jambs set back at sufficient distance from the interior side of the jambs to provide a clear opening width from jamb to jamb and a clear opening height when the door is in fully open position. 6) Horizontal guide mounted wind bar. 7) Door curtain shall have a temperature service range of -40º F to 180º F. B. Door Curtain: 1) Two layers of ethylene propylene diene terpolymer (EPDM) rubber; sandwiched with 1-ply, 110 lbs. polyester cord center. Material provides normal resiliency and flexibility at temperature ranging from -40º F to 180º F. 2) Complete with molded curtain locks that are mechanically attached to the vertical edges of the curtain material. The retention system maintains and holds the curtain in guides under extreme wind load conditions. Curtain Color: gray.
