Louis Armstrong New Orleans International Airport NOAB Project # North Terminal Development Program Phase 1

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1 Louis Armstrong New Orleans International Airport NOAB Project # PART 1 - GENERAL 1.1 RELATED DOCUMENTS SECTION AIR DUCT ACCESSORIES A. Drawings and general provisions of the Contract, including NOAB General Provisions and Division 01 Specification Sections, apply to the work specified in this Section. 1.2 SUMMARY A. Section Includes: 1. Manual volume dampers. 2. Control dampers. 3. Fire dampers. 4. Smoke dampers. 5. Combination fire and smoke dampers. 6. Flange connectors. 7. Duct silencers/sound attenuators. 8. Turning vanes. 9. Remote damper operators. 10. Duct-mounted access doors. 11. Flexible connectors. 12. Flexible ducts. 13. Duct security bars. 14. Duct accessory hardware. 15. Wire mesh grilles. 16. Louvers. 17. Air flow measuring stations. 18. Barometric relief dampers. B. Related Sections: 1. Division 23 Section "HVAC Gravity Ventilators" for roof-mounted ventilator caps. 2. Division 28 Section "Fire Detection and Alarm" for duct-mounted fire and smoke detectors. 3. Division 23 Section Instrumentation and Control for HVAC. 1.3 SUBMITTALS A. Product Data: For each type of product indicated. 1. For all accessories specified, include construction details, dimensions, materials, finishes, bearings and compliance with applicable codes. 2. Performance: Show compliance with pressure drops or specific requirements noted. Construction Documents Air Duct Accessories Page 1 of 18

2 NOAB Project # Louis Armstrong New Orleans International Airport 3. Provide manufacturer s installation instructions. 4. For duct silencers/sound attenuators, include pressure drop and dynamic insertion loss data. Include breakout noise calculations for high transmission loss casings. B. Shop Drawings: For duct accessories. Include plans, elevations, sections, details and attachments to other work. 1. Detail duct accessories fabrication and installation in ducts and other construction. Include dimensions, weights, loads, and required clearances; and method of field assembly into duct systems and other construction. Include the a. Special fittings. b. Manual volume damper installations. c. Control damper installations. d. Fire-damper, smoke-damper, combination fire- and smoke-damper, installations, including sleeves; and duct-mounted access doors and remote damper operators. e. Duct security bars. f. Wiring Diagrams: For power, signal, and control wiring. 2. Duct silencers/sound attenuators: a. Connection details, manufacturer s installation instructions and installation requirements to maintain integrity of sound isolation. b. Test reports indicating dynamic insertion loss and noise generation values of silencers/attenuators. C. Coordination Drawings: Reflected ceiling plans, drawn to scale, on which ceiling-mounted access panels and access doors required for access to duct accessories are shown and coordinated with each other, using input from Installers of the items involved. D. Source quality-control reports. E. Operation and Maintenance Data: For air duct accessories to include in operation and maintenance manuals. 1.4 QUALITY ASSURANCE A. Comply with NFPA 90A, "Installation of Air Conditioning and Ventilating Systems," and with NFPA 90B, "Installation of Warm Air Heating and Air Conditioning Systems." B. Comply with AMCA 500-D testing for damper rating. C. Demonstrate resetting of fire dampers to authorities having jurisdiction and Owner s representatives. 1.5 EXTRA MATERIALS A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. 1. Fusible Links: Furnish quantity equal to 10 percent of amount installed, or a minimum quantity of five of each type installed. 2. Fire Smoke Damper Actuators: Furnish quantity equal to 10 percent of amount installed, or a minimum quantity of five of each type installed Page 2 of 18 Air Duct Accessories Construction Documents

3 Louis Armstrong New Orleans International Airport NOAB Project # Fire Smoke Dampers: In addition to quantity indicated on drawings furnish ten (10) additional fire smoke dampers 24x24 or equivalent size per each floor in North Terminal and 10 per each floor for each Concourse B and C. 4. Fire Dampers: In addition to quantity indicated on drawings furnish ten (10) additional fire dampers 24x24 or equivalent size per each floor in North Terminal and 10 per each floor for each Concourse B and C. 5. PART 2 - PRODUCTS 2.1 MATERIALS A. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discolorations, and other imperfections. B. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M. 1. Galvanized Coating Designation: G Exposed-Surface Finish: Mill phosphatized. C. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304, and having a No. 2 finish for concealed ducts and one-sided bright finish for exposed ducts. D. Aluminum Sheets: Comply with ASTM B 209, Alloy 3003, Temper H14; with mill finish for concealed ducts and standard, 1-side bright finish for exposed ducts. E. Extruded Aluminum: Comply with ASTM B 221, Alloy 6063, Temper T6. F. Reinforcement Shapes and Plates: Galvanized-steel reinforcement where installed on galvanized sheet metal ducts; compatible materials for aluminum and stainless-steel ducts. G. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch minimum diameter for lengths longer than 36 inches. 2.2 MANUAL VOLUME DAMPERS A. Standard, Steel, Manual Volume Dampers: 1. Manufacturers: Subject to compliance with requirements, provide products by one of the a. Air Balance Inc.; a division of Mestek, Inc. b. American Warming and Ventilating; a division of Mestek, Inc. c. McGill AirFlow LLC. d. Ruskin Company. e. Vent Products Company, Inc. f. Pottorff. g. Greenheck. 2. Standard leakage rating, with linkage outside airstream. Construction Documents Air Duct Accessories Page 3 of 18

4 NOAB Project # Louis Armstrong New Orleans International Airport 3. Suitable for horizontal or vertical applications. 4. Frames: a. Hat-shaped, galvanized-steel channels, inch minimum thickness. b. Mitered and welded corners. c. Flanges for attaching to walls and flangeless frames for installing in ducts. 5. Blades: a. Single blade up to 6 inches blade width; multiple blades for width over 6 inches. b. Opposed-blade design for multiple blades dampers. c. Round or oval ducts: butterfly type. d. Stiffen damper blades for stability. e. Galvanized-steel, inch thick. 6. Blade Axles: Galvanized steel or nonferrous metal. 7. Bearings: a. Molded synthetic or stainless-steel sleeve. b. Dampers in ducts with pressure classes of 3-inch wg or less shall have axles full length of damper blades and bearings at both ends of operating shaft. 8. Tie Bars and Brackets: Galvanized steel. B. Standard, Aluminum, Manual Volume Dampers: 1. Manufacturers: Subject to compliance with requirements, provide products by one of the a. Air Balance Inc.; a division of Mestek, Inc. b. American Warming and Ventilating; a division of Mestek, Inc. c. McGill AirFlow LLC. d. Ruskin Company. e. Vent Products Company, Inc. f. Pottorff. g. Greenheck. 2. Standard leakage rating, with linkage outside airstream. 3. Suitable for horizontal or vertical applications. 4. Frames: Hat-shaped, 0.10-inch- thick, aluminum sheet channels; frames with flanges for attaching to walls and flangeless frames for installing in ducts. 5. Blades: a. Single blade up to 6 inches blade width; multiple blades for width over 6 inches. b. Opposed-blade design for multiple blades dampers. c. Stiffen damper blades for stability Page 4 of 18 Air Duct Accessories Construction Documents

5 Louis Armstrong New Orleans International Airport NOAB Project # d. Roll-Formed Aluminum Blades: 0.10-inch- thick aluminum sheet. e. Extruded-Aluminum Blades: inch- thick extruded aluminum. 6. Blade Axles: Nonferrous metal. 7. Bearings: a. Oil-impregnated bronze or stainless-steel sleeve. b. Dampers in ducts with pressure classes of 3-inch wg or less shall have axles full length of damper blades and bearings at both ends of operating shaft. 8. Tie Bars and Brackets: Aluminum. C. Jackshaft: 1. Size: 1-inch diameter. 2. Material: Galvanized-steel pipe rotating within pipe-bearing assembly mounted on supports at each mullion and at each end of multiple-damper assemblies. 3. Length and Number of Mountings: As required to connect linkage of each damper in multiple-damper assembly. D. Damper Hardware: 1. Zinc-plated, die-cast core with quadrant and lever handle made of 3/32-inch- thick zincplated steel, and a lockscrew. 2. Include center hole to suit damper operating-rod size. 3. Include elevated platform to clear insulation for insulated duct mounting. 2.3 CONTROL DAMPERS A. Control dampers shall be furnished by the BMS Contractor for installation by the Mechanical Contractor. Refer to Specification Section and the BMS drawings. 2.4 FIRE DAMPERS 1. Air Balance Inc.; a division of Mestek, Inc. 2. Arrow United Industries; a division of Mestek, Inc. 3. McGill AirFlow LLC. 4. Pottorff; a division of PCI Industries, Inc. 5. Ruskin Company. 6. Greenheck. B. Type: Dynamic; UL listed and rated and labeled according to UL 555 by an NRTL. Conformance with NFPA 90A and authorities having jurisdiction. C. Closing rating in ducts up to 4-inch wg static pressure class and minimum 4000-fpm velocity. D. Fire Rating: Equal to or greater than wall rating. Construction Documents Air Duct Accessories Page 5 of 18

6 NOAB Project # Louis Armstrong New Orleans International Airport E. Frame: Curtain type with blades outside airstream; fabricated with roll-formed, inchthick galvanized steel; with mitered and interlocking corners. F. Mounting Sleeve: Factory- or field-installed, galvanized sheet steel. 1. Minimum Thickness: or inch thick, as indicated, and of length to suit application. 2. Exception: Omit sleeve where damper-frame width permits direct attachment of perimeter mounting angles on each side of wall or floor; thickness of damper frame must comply with sleeve requirements. G. Mounting Orientation: Dynamic spring closure type, vertical or horizontal as indicated. 1. Horizontal ducts: May be gravity drop type. 2. Vertical ducts: Spring loaded type. H. Horizontal Dampers: Include blade lock and stainless-steel closure spring. I. Heat-Responsive Device: Electric resettable link and switch package, factory installed, 165 deg F rated. 2.5 SMOKE DAMPERS 1. Air Balance Inc.; a division of Mestek, Inc. 2. Ruskin Company. 3. Greenheck. 4. Pottorff. B. General Requirements: Label according to UL 555S by an NRTL. C. Smoke Detector: Integral, factory wired for single-point connection. D. Frame: Multiple-blade type; fabricated with roll-formed, inch- thick galvanized steel; with mitered and interlocking corners. E. Blades: Roll-formed, horizontal, interlocking, inch- thick, galvanized sheet steel. In place of interlocking blades, use full-length, inch- thick, galvanized-steel blade connectors. F. Leakage: Class I or Class II depending on system. G. Rated pressure and velocity to exceed design airflow conditions. H. Mounting Sleeve: Factory-installed, inch- thick, galvanized sheet steel; length to suit wall or floor application. I. Damper Actuators: Two-position action. J. Damper Actuators for Return/smoke and MER ventilation dampers associated with Type C AHU s: Modulating type. 1. Provide UL-555-S listed modulating damper actuator/smoke damper assembly. 2. Actuator shall be manufactured by Belimo FSAF series, FSAF 24-SR-S US (spring return motors or approved equal Page 6 of 18 Air Duct Accessories Construction Documents

7 Louis Armstrong New Orleans International Airport NOAB Project # Provide two sets of damper open and closed feedback status contacts for FAS and BMS smoke damper position monitoring. K. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements for motors specified in Division 23 Section "Common Motor Requirements for HVAC Equipment." 1. Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require motor to operate in service factor range above Controllers, Electrical Devices, and Wiring: Comply with requirements for electrical devices and connections specified in Division 26 Sections. 3. Permanent-Split-Capacitor or Shaded-Pole Motors: With oil-immersed and sealed gear trains. 4. Spring-Return Motors: Equip with an integral spiral-spring mechanism where indicated. Enclose entire spring mechanism in a removable housing designed for service or adjustments. Size for running torque rating of 150 in. x lbf and breakaway torque rating of 150 in. x lbf. 5. Outdoor Motors and Motors in Outdoor-Air Intakes: Equip with O-ring gaskets designed to make motors weatherproof. Equip motors with internal heaters to permit normal operation at minus 40 deg F. 6. Nonspring-Return Motors: For dampers larger than 25 sq. ft., size motor for running torque rating of 150 in. x lbf and breakaway torque rating of 300 in. x lbf. 7. Electrical Connection: 115 V, single phase, 60 Hz. L. Accessories: 1. Auxiliary switches for signaling or position indication. 2. Test and reset switches, remote mounted. 2.6 COMBINATION FIRE AND SMOKE DAMPERS 1. Air Balance Inc.; a division of Mestek, Inc. 2. Ruskin Company. 3. Pottorff. 4. Greenheck. B. Type: Dynamic; rated and labeled according to UL 555 and UL 555S by an NRTL. C. Closing rating in ducts up to 4-inch wg static pressure class and minimum 4000-fpm velocity. D. Fire Rating: Equal to or greater than wall rating. E. Frame: Multiple-blade type; fabricated with roll-formed, inch- thick galvanized steel; with mitered and interlocking corners. F. Heat-Responsive Device: Electric resettable link and switch package, factory installed, rated. Conform to NFPA 90A and NFPA 92A for fire and smoke dampers. G. Smoke Detector: Integral, factory wired for single-point connection. Construction Documents Air Duct Accessories Page 7 of 18

8 NOAB Project # Louis Armstrong New Orleans International Airport H. Blades: Roll-formed, horizontal, interlocking, inch- thick, galvanized sheet steel. In place of interlocking blades, use full-length, inch- thick, galvanized-steel blade connectors. I. Leakage: Minimum UL Class II metal to metal, non-degradable, seals rated to minimum of 350 F. J. Rated pressure and velocity to exceed design airflow conditions. K. Mounting Sleeve: Factory-installed, inch- thick, galvanized sheet steel; length to suit wall or floor application. Operator located exterior of sleeve. L. Damper Motors: Two-position action. M. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements for motors specified in Division 23 Section "Common Motor Requirements for HVAC Equipment." 1. Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require motor to operate in service factor range above Controllers, Electrical Devices, and Wiring: Comply with requirements for electrical devices and connections specified in Division 26 Sections. 3. Permanent-Split-Capacitor or Shaded-Pole Motors: With oil-immersed and sealed gear trains. 4. Spring-Return Motors: Equip with an integral spiral-spring mechanism where indicated. Enclose entire spring mechanism in a removable housing designed for service or adjustments. Size for running torque rating of 150 in. x lbf and breakaway torque rating of 150 in. x lbf. 5. Outdoor Motors and Motors in Outdoor-Air Intakes: Equip with O-ring gaskets designed to make motors weatherproof. Equip motors with internal heaters to permit normal operation at minus 40 deg F. 6. Nonspring-Return Motors: For dampers larger than 25 sq. ft., size motor for running torque rating of 150 in. x lbf and breakaway torque rating of 300 in. x lbf. 7. Electrical Connection: 115 V, single phase, 60 Hz. N. Accessories: 1. Auxiliary switches (dry contacts) for signaling or position indication. 2. Test and reset switches, remote mounted. 2.7 FLANGE CONNECTORS 1. Ductmate Industries, Inc. 2. Ward Industries, Inc.; a division of Hart & Cooley, Inc. B. Description: Add-on or roll-formed, factory-fabricated, slide-on transverse flange connectors, gaskets, and components. C. Material: Galvanized steel or aluminum to match duct material. D. Gage and Shape: Match connecting ductwork Page 8 of 18 Air Duct Accessories Construction Documents

9 Louis Armstrong New Orleans International Airport NOAB Project # DUCTWORK LAGGING A. Acoustic Insulation: 2 inch thick, 3 to 5 lb/cu ft density, glass fiber or mineral wool insulation. B. Covering: Mass loaded vinyl with surface weight not less than 4 lb/sq ft. 2.9 TURNING VANES 1. Ductmate Industries, Inc. 2. Duro Dyne Inc. 3. METALAIRE, Inc. B. Manufactured Turning Vanes for Metal Ducts: Curved blades of galvanized steel, aluminum or stainless steel sheet, to match duct material; support with bars perpendicular to blades set; set into vane runners suitable for duct mounting. 1. Acoustic Turning Vanes: Fabricate airfoil-shaped aluminum extrusions with perforated faces and fibrous-glass fill. C. General Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; "Vanes and Vane Runners," and "Vane Support in Elbows." D. Vane Construction: Double wall REMOTE DAMPER OPERATORS 1. Ventfabrics, Inc. 2. Young Regulator Company. B. Description: Cable system designed for remote manual damper adjustment. C. Tubing: Brass. D. Cable: Stainless steel. E. Ceiling Mounting: Concealed ceiling mounting brackets, with cover plate and all necessary hardware for a complete installation. Cover plate finish to match ceiling finish. 1. High security areas: Provide tamper-proof threaded cap DUCT-MOUNTED ACCESS DOORS 1. American Warming and Ventilating; a division of Mestek, Inc. 2. Ductmate Industries, Inc. 3. McGill AirFlow LLC. 4. Pottorff; a division of PCI Industries, Inc. 5. Ventfabrics, Inc. Construction Documents Air Duct Accessories Page 9 of 18

10 NOAB Project # Louis Armstrong New Orleans International Airport 6. Ward Industries, Inc.; a division of Hart & Cooley, Inc. B. Duct-Mounted Access Doors: Fabricate access panels according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; "Duct Access Doors and Panels," and "Access Panels - Round Duct." 1. Door: a. Double wall, rectangular. b. Sheet metal, to match duct material, with insulation fill and thickness as indicated for duct pressure class. c. Vision panel. d. Hinges and Latches: 2-by-2-inch butt or piano hinge and cam latches. e. Fabricate doors airtight and suitable for duct pressure class. f. Size: Not less than 16 inches by 14 inches. Ducts less than 16 inches in height, install with one dimension 16 inches and other dimension 2 inches less than duct width. Install larger sized doors where required for access. 2. Frame: Same material as door, with bend-over tabs and foam gaskets. 3. Number of Hinges and Locks: a. Access Doors Less Than 12 Inches Square: No hinges and two sash locks. b. Access Doors up to 18 Inches Square: Two hinges and two sash locks. c. Access Doors up to 24 by 48 Inches: Three hinges and two compression latches with outside and inside handles. d. Access Doors Larger Than 24 by 48 Inches: Four hinges and two compression latches with outside and inside handles DUCT ACCESS PANEL ASSEMBLIES 1. Ductmate Industries, Inc. 2. Flame Gard, Inc. 3. 3M. B. Labeled according to UL 1978 by an NRTL. C. Panel and Frame: Minimum thickness inch carbon. Material shall be similar to that in which the access door will be installed. D. Fasteners: Stainless steel. Panel fasteners shall not penetrate duct wall. E. Gasket: Comply with NFPA 96; grease-tight, high-temperature ceramic fiber, rated for minimum 2000 deg F. F. Minimum Pressure Rating: 10-inch wg, positive or negative Page 10 of 18 Air Duct Accessories Construction Documents

11 Louis Armstrong New Orleans International Airport NOAB Project # FLEXIBLE CONNECTORS 1. Ductmate Industries, Inc. 2. Duro Dyne Inc. 3. Ventfabrics, Inc. 4. Ward Industries, Inc.; a division of Hart & Cooley, Inc. B. Materials: Flame-retardant or noncombustible fabrics. C. Coatings and Adhesives: Comply with UL 181, Class 1. D. Metal-Edged Connectors: Factory fabricated with a fabric strip 5-3/4 inches wide attached to 2 strips of 2-3/4-inch- wide, inch- thick, galvanized sheet steel or inch- thick aluminum sheets. Provide metal compatible with connected ducts. E. Indoor System, Flexible Connector Fabric: Glass fabric double coated with neoprene. 1. Minimum Weight: 30 oz./sq. yd.. 2. Tensile Strength: 480 lbf/inch in the warp and 360 lbf/inch in the filling. 3. Service Temperature: Minus 40 to plus 200 deg F. F. Outdoor System, Flexible Connector Fabric: Glass fabric double coated with weatherproof, synthetic rubber resistant to UV rays and ozone. 1. Minimum Weight: 30 oz./sq. yd.. 2. Tensile Strength: 530 lbf/inch in the warp and 440 lbf/inch in the filling. 3. Service Temperature: Minus 50 to plus 250 deg F. G. High-Temperature System, Flexible Connectors: Glass fabric coated with silicone rubber. 1. Minimum Weight: 16 oz./sq. yd.. 2. Tensile Strength: 285 lbf/inch in the warp and 185 lbf/inch in the filling. 3. Service Temperature: Minus 67 to plus 500 deg F. H. Thrust Limits: Combination coil spring and elastomeric insert with spring and insert in compression, and with a load stop. Include rod and angle-iron brackets for attaching to fan discharge and duct. 1. Frame: Steel, fabricated for connection to threaded rods and to allow for a maximum of 30 degrees of angular rod misalignment without binding or reducing isolation efficiency. 2. Outdoor Spring Diameter: Not less than 80 percent of the compressed height of the spring at rated load. 3. Minimum Additional Travel: 50 percent of the required deflection at rated load. 4. Lateral Stiffness: More than 80 percent of rated vertical stiffness. 5. Overload Capacity: Support 200 percent of rated load, fully compressed, without deformation or failure. 6. Elastomeric Element: Molded, oil-resistant rubber or neoprene. Construction Documents Air Duct Accessories Page 11 of 18

12 NOAB Project # Louis Armstrong New Orleans International Airport 7. Coil Spring: Factory set and field adjustable for a maximum of 1/4-inch movement at start and stop FLEXIBLE DUCTS 1. Flexmaster U.S.A., Inc. 2. McGill AirFlow LLC. 3. Ward Industries, Inc.; a division of Hart & Cooley, Inc. B. Insulated, Flexible Duct: UL 181, Class 0, interlocking triple-lock spiral of aluminum; fibrousglass insulation; aluminized vapor-barrier film. 1. Pressure Rating: 84-inch wg positive or and 2-inch wg negative. ADD #12 2. Maximum Air Velocity: 500 fpm. 3. Temperature Range: Minus 20 to plus 250 deg F. 4. Maximum length allowed is 18 inch for branch duct alignment at diffusers. 5. Insulation R-value: Minimum installed R value shall be R -6 for indoors and R -8 for outdoors. 6. For use in low pressure duct only at diffuser connections. C. Flexible Duct Connectors: 1. Clamps: Stainless-steel band with cadmium-plated hex screw to tighten band with a wormgear action in sizes 3 through 18 inches, to suit duct size DUCT SECURITY BARS 1. Carnes. 2. KEES, Inc. 3. Lloyd Industries, Inc. 4. Metal Form Manufacturing, Inc. 5. Price Industries. B. Description: Factory-fabricated and field-installed duct security bars. C. Configuration: 1. Frame: 10 gage by 2 inches. 2. Sleeve: 3/16-inch, continuously welded steel frames with 1-by-1-by-3/16-inch angle frame factory welded to 1 end or furnished loose for field welding on other end. To be poured in place or set with concrete block or welded or bolted to wall, one side only. Duct connections on both sides. 3. Horizontal Bars: 1/2 inch. 4. Vertical Bars: 1 inch Page 12 of 18 Air Duct Accessories Construction Documents

13 Louis Armstrong New Orleans International Airport NOAB Project # Bar Spacing: 6 inches. 6. Mounting: Bolted or welded WIRE MESH GRILLES A. Construction: 1/2 inch mesh screen with 1 inch sheet metal frame, bolted to flanged duct connection. B. Materials: 2.17 LOUVERS 1. Screen: Minimum 18 gauge galvanized steel or 14 gauge aluminum. 2. Frame: Minimum inch thick galvanized sheet steel or aluminum sheet. 3. Bolts and nuts: Indoors, galvanized steel; exposed to weather, stainless steel. A. Connect to louvers furnished under General Construction work. B. Manufacturers: Subject to compliance with requirements, provide products by one of the 1. Airolite Co. 2. Arrow United Industries. 3. Carnes Co. 4. Ruskin Co. C. Tested in accordance with AMCA Standard 500 and provided with AMCA Certified Rating Seal. D. Material: Extruded aluminum; comply with ASTM B 221 (ASTM B 221M), Alloy 6063 T 5, with anodized finish. E. Frame: Minimum inch thick extruded aluminum, with welded corners and mounting flange. Mounting arrangement shall be suitable for installation in particular building construction. F. Blades: 4 inch deep stationary blades, minimum inch thick extruded aluminum, welded to frame for a complete welded assembly. 1. Set at 45 angle, with 50 percent free area. 2. Stormproof, double drainage type blade configuration. 3. Performance: Water penetration shall be not more than 0.01 oz/sq ft at 950 ft/min. G. Screen: Aluminum wire, 0.5 inch mesh in a removable frame. 1. Bolted to interior face of louver. 2. Secured on interior of louver with 2 inch space. H. Blank-off panels: Provide for unused portion of louvers. 1. Double wall construction. Inner and outer casing: inch thick aluminum. 2. Internal insulation: 2 inch thick glass fiber, per SMACNA Duct Construction Standards. Construction Documents Air Duct Accessories Page 13 of 18

14 NOAB Project # Louis Armstrong New Orleans International Airport 2.18 AIR FLOW MEASURING STATIONS A. Airflow measuring stations shall be furnished by the BMS Contractor for installation by the Mechanical Contractor for duct and outside air mounted type; or by the AHU or fan manufacturer for the equipment mounted type. Refer to Specification Section and the BMS drawings BAROMETRIC RELIEF DAMPERS a. Nailor Industries, Inc. b. Ruskin Company. c. Vent Products Company, Inc. d. Pottorf. B. Suitable for horizontal or vertical mounting. C. Maximum System Pressure: 0.2-inch wg. D. Frame: Hat-shaped, 0.05-inch- thick, galvanized sheet steel, with welded corners or mechanically attached and mounting flange. E. Blades: 1. Multiple, inch- thick, roll-formed aluminum. 2. Maximum Width: 6 inches. 3. Action: Parallel. 4. Balance: Gravity. F. Blade Seals: Neoprene. G. Blade Axles: Galvanized steel. H. Tie Bars and Brackets: 1. Material: Galvanized steel. 2. Rattle free with 90-degree stop. I. Return Spring: Adjustable tension. J. Bearings: Synthetic. K. Accessories: 1. Flange on intake. 2. Adjustment device to permit setting for varying differential static pressures DUCT ACCESSORY HARDWARE A. Instrument Test Holes: Cast iron or cast aluminum to suit duct material, including screw cap and gasket. Size to allow insertion of pitot tube and other testing instruments and of length to suit duct-insulation thickness Page 14 of 18 Air Duct Accessories Construction Documents

15 Louis Armstrong New Orleans International Airport NOAB Project # B. Adhesives: High strength, quick setting, neoprene based, waterproof, and resistant to gasoline and grease. PART 3 - EXECUTION 3.1 INSTALLATION A. Install duct accessories according to applicable details in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for metal ducts and in NAIMA AH116, "Fibrous Glass Duct Construction Standards," for fibrous-glass ducts. B. Install duct accessories of materials suited to duct materials; use galvanized-steel accessories in galvanized-steel and fibrous-glass ducts, stainless-steel accessories in stainless-steel ducts, and aluminum accessories in aluminum ducts. C. Install control dampers at inlet of exhaust fans or exhaust ducts as close as possible to exhaust fan unless otherwise indicated. D. Install volume dampers at points on supply, return, and exhaust systems where branches extend from larger ducts and as indicated, a minimum of 3 feet from outlets, or as near to the branch take-off at the main duct.. Where dampers are installed in ducts having duct liner, install dampers with hat channels of same depth as liner, and terminate liner with nosing at hat channel. 1. Install volume dampers at the following locations: a. At all splits, except grease exhaust ducts. b. In ducts serving single supply, return and exhaust outlets. c. In open return ducts above ceiling. d. In ducts connecting to a common plenum. e. Where indicated on drawings and in details. f. Where required for balancing. 2. Install remote damper operators for volume dampers above ceilings which are nonaccessible or without access panels. 3. Install steel volume dampers in steel ducts. 4. Install aluminum volume dampers in aluminum ducts. 5. Do not install volume dampers in grease ducts. E. Set dampers to fully open position before testing, adjusting, and balancing. F. Install test holes at fan inlets and outlets and elsewhere as indicated and in ductwork where required for testing and adjusting. G. Install fire and smoke dampers according to UL listing in ducts and openings in the 1. Shaft walls. 2. Floors and ceilings. 3. Fire walls. 4. Fire resistance partitions. 5. Fire rated ceilings. Construction Documents Air Duct Accessories Page 15 of 18

16 NOAB Project # Louis Armstrong New Orleans International Airport 6. Exit corridor walls. 7. Elsewhere as indicated on drawings. H. Install duct security bars. Construct duct security bars from inch steel sleeve, continuously welded at all joints and 1/2-inch- diameter steel bars, 6 inches o.c. in each direction in center of sleeve. Weld each bar to steel sleeve and each crossing bar. Weld 2-1/2- by-2-1/2-by-1/4-inch steel angle to 4 sides and both ends of sleeve. Connect duct security bars to ducts with flexible connections. Provide 12-by-12-inch hinged access panel with cam lock in duct in each side of sleeve. I. Duct Silencers/Sound Attenuators: 1. Install duct silencers, acoustic housing and acoustical louvers in accordance with manufacturer s instructions. 2. Support duct silencers rigidly to ductwork. 3. Attach ductwork to acoustical louvers with flexible duct connectors. 4. Lag ductwork, where indicated, by wrapping with insulation and covering. Apply covering to be airtight. Do not attach overing rigidly to ductwork. J. Install duct access doors on sides of ducts to allow for inspecting, adjusting, and maintaining accessories and equipment at the following locations: 1. On both sides of duct coils. 2. Upstream and downstream from duct filters. 3. At outdoor-air intakes and mixed-air plenums. 4. At drain pans and seals. 5. Downstream from manual volume dampers, control dampers, backdraft dampers, and equipment. 6. Adjacent to and close enough to fire or smoke dampers, to reset or reinstall fusible links. Access doors for access to fire or smoke dampers having fusible links shall be pressure relief access doors and shall be outward operation for access doors installed upstream from dampers and inward operation for access doors installed downstream from dampers. ADD #12 7. NOT USED ADD #12At each change in direction and at maximum 50-foot spacing. 8. NOT USED ADD #12Upstream and downstream from turning vanes. 9. Upstream or downstream from duct silencers. 10. Control devices requiring inspection, including smoke detection heads. 11. At fan bearings enclosed in ducts. 12. Inlet side of each single width centrifugal fan. 13. At inlet and outlet sides of each in-line centrifugal and axial fan. 14. At duct humidifiers. 15. Air flow stations. K. Install access doors with swing against duct static pressure. L. Access Door Sizes: Page 16 of 18 Air Duct Accessories Construction Documents

17 Louis Armstrong New Orleans International Airport NOAB Project # One-Hand or Inspection Access: 8 by 5 inches. 2. Two-Hand Access: 12 by 6 inches. 3. Head and Hand Access: 18 by 12 inches. 4. Head and Shoulders Access: 21 by 14 inches. 5. Body Access: 25 by 14 inches. 6. Body plus Ladder Access: 25 by 17 inches. M. Label access doors according to Division 23 Section "Identification for HVAC Piping and Equipment" to indicate the purpose of access door. N. Install flexible connectors at duct connections to equipment, at building expansion joints, at connections between ducts of dissimilar metals and at penetrations of mechanical equipment room walls. 1. Install flexible connections with 2 inches slack in fabric and minimum movement of 1 inch. O. For fans developing static pressures of 5-inch wg and more, cover flexible connectors with loaded vinyl sheet held in place with metal straps. P. Connect terminal units to supply ducts directly with hard sheet metal duct. Do not use flexible ducts. Q. Connect diffusers to ducts directly or with maximum 3660-inch lengths of flexible duct clamped or strapped in place. Seal with tape and provide with 90 degree elbow brace similar to Titus FlexRight. ADD #12 R. Connect flexible ducts to metal ducts with draw bands, adhesive plus sheet metal screws. Attach to supply air duct with low entrance loss, bellmouth type connector at air inlet end. S. Install duct test holes where required for testing and balancing purposes. T. Install thrust limits at centerline of thrust, symmetrical on both sides of equipment. Attach thrust limits at centerline of thrust and adjust to a maximum of 1/4-inch movement during start and stop of fans. U. Install wire mesh screen grilles at return air ducts in hung ceilings and in other places where indicated. Bolt grilles to flanged connections or ducts at terminations. V. Install louvers in building construction at locations where indicated. Coordinate mounting details with particular building construction and/or window framing details. Install blank-off panels at unused portions of louvers; secured with bolts and/or screws. W. Air Flow Measuring Stations 1. Install air flow measuring stations where indicated, or as directed by engineer. 2. Install all interconnecting tubing between measuring station, companion meter and control systems, in accordance with the manufacturer s printed instructions. X. Install air blenders in accordance with the manufacturer s recommendations. 3.2 FIELD QUALITY CONTROL A. Tests and Inspections: 1. Operate dampers to verify full range of movement. 2. Inspect locations of access doors and verify that purpose of access door can be performed. Construction Documents Air Duct Accessories Page 17 of 18

18 NOAB Project # Louis Armstrong New Orleans International Airport 3. Operate fire, smoke, and combination fire and smoke dampers to verify full range of movement and verify that proper heat-response device is installed. 4. Inspect turning vanes for proper and secure installation. 5. Operate remote damper operators to verify full range of movement of operator and damper. 3.3 MANUFACTURER S FIELD SERVICES A. Provide services of an AABC or NEBB testing agency to take noise measurements. Use meters meeting requirements of ASA 47 (ANSI S1.4). B. After start-up, and final corrections and balancing of systems, take octave band sound measurements over full audio frequency range in areas adjacent to mechanical equipment rooms, duct and pipe shafts, and other critical locations, as directed. C. Provide one-third octave band measurements of artificial sound sources in areas indicated as having critical requirements. D. Submit complete report of test results including sound curves. 3.4 COMMISSIONING A. Comply with commissioning process procedures and requirements as specified in Division HVAC System Commissioning, and Division 01 General Requirements, in addition to the commissioning requirements in each section. END OF SECTION Page 18 of 18 Air Duct Accessories Construction Documents