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Construction Documents <br />20052.02 / Orange County - Justice <br />Facility <br />23 3100 - 2 HVAC DUCTS AND CASINGS <br />B.Flexible Ducts: Multiple layers of aluminum laminate supported by helically wound spring steel <br />wire. <br />1.Pressure Rating: 10 inches WG (2.50 kPa) positive and 1.0 inches WG (250 Pa) negative. <br />2.Maximum Velocity: 4000 fpm (20.3 m/sec). <br />3.Temperature Range: Minus 20 degrees F to 210 degrees F (Minus 28 degrees C to 99 <br />degrees C). <br />2.05 CASINGS <br />A.Fabricate casings in accordance with SMACNA (DCS) and construct for operating pressures <br />indicated. <br />B.Mount floor mounted casings on 4 inch (100 mm) high concrete curbs. At floor, rivet panels on <br />8 inch (200 mm) centers to angles. Where floors are acoustically insulated, provide liner of <br />galvanized 18 gage, 0.0478 inch (1.21 mm) expanded metal mesh supported at 12 inch (300 <br />mm) centers, turned up 12 inches (300 mm) at sides with sheet metal shields. <br />C.Reinforce door frames with steel angles tied to horizontal and vertical plenum supporting <br />angles. Install hinged access doors where indicated or required for access to equipment for <br />cleaning and inspection. <br />PART 3 EXECUTION <br />3.01 INSTALLATION <br />A.Install, support, and seal ducts in accordance with SMACNA (DCS). <br />B.Flexible Ducts: Connect to metal ducts with adhesive. <br />C.Duct sizes indicated are inside clear dimensions. For lined ducts, maintain sizes inside lining. <br />D.Locate ducts with sufficient space around equipment to allow normal operating and <br />maintenance activities. <br />E.Use crimp joints with or without bead for joining round duct sizes 8 inch (200 mm) and smaller <br />with crimp in direction of air flow. <br />END OF SECTION 23 3100 <br />DocuSign Envelope ID: 09980A3B-0691-41B4-854D-3865F2287392