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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> Orange County Emergency Services Building Construction Documents <br /> 1. Acudor Products Inc, a Division of Nelson Industrial Inc: www.acudor.com. <br /> 2. Durodyne <br /> 3. Elgen Manufacturing: www.elgenmfg.com. <br /> 4. Nailor Industries Inc: www.nailor.com. <br /> 5. Ruskin Company: www.ruskin.com. <br /> B. Fabrication: Rigid and close-fitting of galvanized steel with sealing gaskets and quick fastening <br /> locking devices. For insulated ducts, install minimum 1 inch thick insulation with sheet metal cover. <br /> 1. Up to 18 inches Square: Provide two hinges and two sash locks. <br /> 2. Up to 24 by 48 inches: Three hinges and two compression latches with outside and inside <br /> handles. <br /> C. Access doors with sheet metal screw fasteners are not acceptable. <br /> 2.03 DUCT TEST HOLES <br /> A. Temporary Test Holes: Cut or drill in ducts as required. Cap with neat patches, neoprene plugs, <br /> threaded plugs, or threaded or twist-on metal caps. <br /> B. Permanent Test Holes: Factory fabricated, air tight flanged fittings with screw cap. Provide <br /> extended neck fittings to clear insulation. <br /> 2.04 FIRE DAMPERS <br /> A. Manufacturers: <br /> 1. Nailor Industries Inc: www.nailor.com. <br /> 2. Pottorff: www.pottorff.com/#sle. <br /> 3. Ruskin Company: www.ruskin.com. <br /> 4. Air Balance, Inc. <br /> 5. Greenheck <br /> 6. Metal Industries <br /> 7. Prefco <br /> 8. United Enertech <br /> B. Fabricate in accordance with NFPA 90A and UL 555, and as indicated. <br /> C. Ceiling Dampers: Galvanized steel, 22 gage, 0.0299 inch frame and 16 gage, 0.0598 inch flap, two <br /> layers 0.125 inch ceramic fiber on top side and one layer on bottom side for round flaps, with <br /> locking clip. <br /> D. Horizontal Dampers: Galvanized steel, 22 gage, 0.0299 inch frame, stainless steel closure spring, <br /> and lightweight, heat retardant non-asbestos fabric blanket. <br /> E. Curtain Type Dampers: Galvanized steel with interlocking blades. Provide stainless steel closure <br /> springs and latches for horizontal installations. Configure with blades out of air stream except for <br /> 1/2" inch pressure class ducts up to 12 inches in height. <br /> F. Fusible Links: UL 33, separate at 160 degrees F with adjustable link straps for combination <br /> fire/balancing dampers. <br /> 2.05 FLEXIBLE DUCT CONNECTIONS <br /> A. Manufacturers: <br /> 1. Carlisle HVAC Products; Dynair Connector Plus G90 Steel Offset Seam Neoprene Fabric: <br /> www.carlislehvac.com/#sle. <br /> 2. Elgen Manufacturing, Inc: www.elgenmfg.com. <br /> 3. Durodyne <br /> B. Fabricate in accordance with SMACNA (DCS)and as indicated. <br /> C. Flexible Duct Connections: Fabric crimped into metal edging strip. <br /> 1. Fabric: UL listed fire-retardant neoprene coated woven glass fiber fabric to NFPA 90A, <br /> minimum density 30 oz per sq yd. <br /> a. Net Fabric Width: Approximately 3 inches wide. <br /> D. Maximum Installed Length: 14 inch. <br /> 2.06 VOLUME CONTROL DAMPERS <br /> A. Manufacturers: <br /> PDC Project 18102 AIR DUCT ACCESSORIES 23 33 00 - 2 <br /> 12/17/2018 <br />