Vol 2 - Garney Construction

D. Surface Burning Characteristics, Foam Insulation: Maximum 75/450 flamespread/smoke developed index when tested in accordance with ASTM E84.2.03 COMPONENTSA. Curtain: Conform to the following:1. Aluminum Slats: Interlocking, minimum 0.040 inch thick ofASTM B221 aluminum alloy Type 6063.2. Type: Sandwich slat construction with manufacturer’s standardinsulated core with maximum U-value of 0.16 and backing to matchface slat, thermally separated from face slat.3. Nominal Slat Size: 3 inches wide by required length.4. Slat Ends: Each slat fitted with end locks to act as wearing surface inguides and to prevent lateral movement.5. Curtain Bottom: Fitted with aluminum angles to provide reinforcementand positive contact with O: floor in closed position.B. Guides:1. Minimum 3/16 inch (5 mm) thick; rolled aluminum or hotdippedgalvanized steel.2. Furnish continuous angles of profile to retain door in place withmounting brackets of same metal.C. Roller Shaft Counterbalance: Galvanized steel pipe and helical steel springsystem, capable of producing torque sufficient to ensure smooth operation ofcurtain from any position and capable of holding position at mid-travel; withadjustable spring tension.D. Hood Enclosure: Round shape, minimum 0.040-inch thick aluminum;internally reinforced to maintain rigidity and shape.1. Weatherstripping (Exterior Assemblies): Moisture and rot proof,resilient type for complete weathertight installation.a. Rubber, neoprene, or vinyl water seal at hood to prevent airflowaround coil on exterior doors.b. Weather seal sealing strip on guide to close space between guideand curtain on exterior doors.E. Electric Operation:1. Electric motor operated unit with manual override in case of powerfailure.2. UL 325, side mounted, totally enclosed, nonventilated or fan-cooledmotor.3. Motor Enclosure: NEMA MG1 Type 4 enclosure.PW/WBG/382059OVERHEAD COILING DOORSAUGUST 15, 2012 08 33 23 - 3©COPYRIGHT 2012 CH2M HILL