Specifications include, but are not limited to: A. Design Requirements: Rapid roll-up doors must be able to withstand a wind pressure of twenty (20) pounds (lbs.) 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 -40 degrees Fahrenheit to 180 degrees Fahrenheit. B. Door Curtain: 1) Two (2) layers of Ethylene Propylene Diene Terpolymer (EPDM) rubber; sandwiched with one (1)-ply, one-hundred ten (110) pounds polyester cord center. Material provides normal resiliency and flexibility at temperature ranging from -40 degrees Fahrenheit to 180 degrees Fahrenheit. 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 shall be gray. C. Guides: 1) Side curtain retention guides must be one-piece extruded aluminum to form a slot of sufficient depth to allow the “curtain locks” to move freely in the guides, at all times. Aluminum members must have sufficient thickness and rigidity to maintain the curtain within the guides during normal operation while enabling the curtain lock to release during accidental impact. 2) Side frame mounting angle must be provided for installation directly onto concrete or steel door framing. 3) Bottom bar must extend the full width of the curtain, sufficient to maintain the bottom edge of the curtain, parallel to the door threshold, at all times. The bottom bar must be constructed of two steel angles bolted together and must have a knock-away section to reduce risk of damage during accidental impacts. Knock-away bottom bar must be able to be reset without the need to open the side frames.
