Buffalo Wild Wings

PART 3. – EXECUTION3.1 GENERALA. Kitchen exhaust ductwork to be 16 gauge steel with liquid tight weld. Duct to slope 2%towards hood or an approved grease collector. Provide cleanouts as required, per Code.Installation of kitchen exhaust ductwork shall comply with NFPA, State and Local Codes.B. Ductwork behind registers arid grilles shall be painted out flat black.C. Provide a minimum of 2” wide flexible connectors to all ducted equipment less than 2000CFM and 4” wide on 2000 CFM and greater.D. Flexible Ductwork.1. The flexible duct shall be of semi-rigid construction capable of maintaining theshaping required by job conditions without subsequent sagging or droop. Ductconnections to equipment outlet collars shall be made in accordance with theduct manufacturer’s recommendations. Maximum flexible air duct length not toexceed 5’-0”.2. Flexible air duct shall be externally insulated with 1/2” thick 3/4 lb. densityfiberglass wrapped around twice to 1” thick complete with non-combustible vaporbarrier and UL listed.3. Ductwork and insulation shall be UL listed as Flexible Air Ducts ConnectionClass I, and meet all NFPA 90A and 90B requirements.4. Insulated flexible duct shall be equal to Thermaflex M-KE.5. No flexible ductwork connections shall be allowed in exposed ceiling areas.E. Access Doors.1. Where motorized dampers, fire dampers, control equipment are installed inductwork, provide suitable sized, gasketed doors in ducts. Doors shall beprovided with Ventlok #220 door pull and #90 sash type latches. Use spongerubber to felt gasketing material on door openings. Access doors in insulatedductwork shall be double wall construction with 1” insulation between wall.F. Air Control Devices.1. Provide splitter dampers on all main ducts and where shown on the drawings.Provide Ventlok #690 or approved equal, self-locking splitter assembly on eachdamper.2. Provide Clevepak (or approved equal) Type DESC damper extractor with spincollarat all branch take offs.3. Provide a balancing damper to each diffuser.4. In all inaccessible areas, provide balancing damper within reach at each diffuseror register.END OF SECTION 1580006/25/09 DUCTWORK MATERIALS AND METHODS15800-2