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HomeMy WebLinkAboutM003 - MECHANICAL SPECIFICATIONSri 0 S W t 1. Duct: For penetrations through fire -rated assemblies, terminate insulation at fire damper sleeves and externally insulate tlampersleeve beyond floor to match adjacent duct insulation. Overlap damper sleeve and dud insulation at least 2 inches. 2. Seal penetrations through fire-reted assemblies. Comply with requirements in Section 078413 "Penetm ion Firestopping.• 2.4 INSTALLATION OF FLEXIBLE ELASTOMERIC INSULATION A. Seal longitudinal seams and end joints with manufacturers recommended adhesive to eliminate openings in insulation that allow passage of air to surface being insulated. 2.5 INSTALLATION OF MINERAL -FIBER INSULATION A. Blanket Insulation Installation on Ducts and Plenums: Secure with adhesive and insulation pins. 1. Apply adhesives according to manufacturer's recommended cevemge rates per unit area. 2. Apply adhesive to entire circumference of ducts and to all surfaces of fittings and transitions. 3. Install either capacitor -discharge -weld pins and speed washers or cupped -head, capacitor -discharge -weld pins on sides and bottom of horizontal duct and sides of vertical ducts as follows: a. On duct sides with dimensions 18 inches and smaller, place pins along longitudinal centerline of duct. Space 3 inches maximum from insulation end joints, and 16 inches o.c. b. On dud sides with dimensions larger than 18 inches, place pins 16 inches o.c. each way, and 3 inches maximum from insulation joints. Install additional pins to hold insulation tightly against surface at doss bracing. C. Pins may be omitted from top surface of horizontal, rectangular ducts and plenums. d. Do not overcompress insulation during installation. e. Impale insulation over pins and attach speed washers. f. Cut excess portion of pins extending beyond seed washers or bend parallel with insulation surface. Cover exposed pins and washers with tape matching insulation facing. 4. For tlucts and plenums with surface temperatures below ambient, install a continuous unbroken vapor bander. Create a facing lap for longitudinal seams and end joints with insulation by removing2 inches from one edge and one end of insulation segment. Secure 9 9 laps adjacent insulation section with 1/2-inch outward -clinching staples, th inch O.C. Install vaporr barrier consisting of factory- or field -applied jacket, adhesive, vapor -barmier mastic, and sealant et joints, seams, and protrusions. a. Repair punctures, tears, and penetrations with tape or mastic to maintain vapor -banner Seal. b. Install vapor stops for ductwork and plenums operating below 50 deg F at 18-foot intervals. Vapor stops shall consist of vapor -banner mastic applied in a Zshaped pattern over insulation face, along butt end of insulation, and over the surface. Cover insulation face and surface to be insulated a width equal to two times the insulation thickness, but not less than 3 inches. 5. Overlap unfaced blankets a minimum of 2 inches on longitudinal seams and end joints. At end joints, secure with steel tends spaced a maximum of 18 inches o.c. 6. Instill insulation on rectangular duct elbows and trans Bions with a full insulation section for each surface. Install insulation on round and flat -oval duct elbows with individually mitered gores cut to fit the elbow. 7. Insulate duct stiffeners, hangers, and flanges that protrude beyond insulation surface with 6-inch-wide steps of same material used to insulate duct. Secure on alternating sides of stiffener, hanger, and flange with pins spaced 6 inches o.c. 2.6 FIELD -APPLIED JACKET INSTALLATION A. Where glass -cloth jackets are indicated, install directly over bare insulation or insulation with factory-applietl jackets. 1. Draw jacket smooth and tight to surface with 2-inch overlap at seams and joints. 2. Embed glass cloth between We 0.0624nch-thick coats of lagging adhesive. 3. Completely encapsulate insulation with coating, leaving no exposed insulation. B. Where FSK jackets are indicated, install as follows: 1. Draw jacket material smooth and tight. 2. Install lap orjoint strips with same material as jacket. 3. Secure jacket to insulation with manufacturers recommended adhesive. 4. Install jacket with 1-1/2-inch laps at longitudinal seams and 3-inch-wide joint strips at end joints. 5. Seal openings, punctures, and breaks in vapor -retarder jackets and exposed insulation with vapor -banner mastic. C. Where PVC jackets are indicated, install with 1-inch overlap at longitudinal seams and end joints; for horizontal applications, install with longitudinal seams along top and bottom of tanks and vessels. Seal with manufacturers recommended adhesive. 1. Apply two continuous heads of adhesive to seams and joints, one bead under lap and the fin a bead along seam and joint edge. D. Where metal jackets are indicated, install with 2-inch overlap at longitudinal seams and end joints. Overlap longitudinal seams arranged to shed rater. Seal end joints with weatherproof sealant recommended by insulation manufacturer. Secure jacket with stainless -steel banes 12 inches o.c. and at end joints. 2.7 INDOOR DUCT AND PLENUM INSULATION SCHEDULE A. Concealed, round and flatcval, suppysir duct insulation shall be the following: 1. Mineral -Fiber Blanket: 1-12 inches thick and 0.75-Ib/cu. ft. nominal density. B. Concealed, rectangular, supply -air duct insulation shall be the following: 1. Mineral -Fiber Blanket: 1-1/2 inches thick and 0.75-Ib/cu. ft. nominal density. 2.8 ABOVEGROUND, OUTDOOR DUCT AND PLENUM INSULATION SCHEDULE A. Insulation materiak and thicknesses are identified below. If more than one material is listed fora duct system, selection from materials listed is Contractors option. B. Exposed, rectangular, supply air duct insulation shall be one of the following: 1. Mineral -Fiber Blanket: 2 inches and 1.5-lb/w. ft. nominal density. 2. Mineral -Fiber Board 2 inches thick and 2-lb/cu. ft. nominal density. C. Exposed, rectangular, retun it duct insulation shall be one of the following: 1. Mineral -Fiber Blanket: 2 inches and 1.5-lb/rim. ft. nominal density. 2. Mineral -Fiber Board: 2 inches thick and 2-lb/cu. ft. nominal density. 2.9 OUTDOOR, FIELD -APPLIED JACKET SCHEDULE A. Install jacket over insulation material. For insulation with factoryspplied jacket, install the field -applied jacket over the factory -applied jacket. B. Ducts and Plenums, Exposed, up to 48 Inches in Diameter or with Flat Surfaces up to 72 Inches: 1. Aluminum, Stucco Embossed: 0.020 inch thick. SECTION 231123 - FACILITY NATURAL-GAS PIPING 1.1 PERFORMANCE REQUIREMENTS A. Minimum Operating -Pressure Ratings: 1. Piping and Valves: 100 psig minimum unless otherwise indicated. 2. Service Regulators: 100 psig minimum unless otherwise indicated. 3. Minimum Operating Pressure of Service Meter 5 psig. B. Natuml-Gas System Pressure within Buildings: Man: than 0.5 psig but not more than 2 psig. 1.2 PROJECT CONDITIONS A. Perform site survey, research public utility records, and verify existing utility locations. Contact utility -locating service for area where Project is located. RELEASED FOR CONSTRUCTION Subject to compliance with all regulations of State and Local Codes City of Camel DATE: 08/23/19 PART 2-PRODUCTS 2.1 PIPES, TUBES, AND FITTINGS A. Steel Pipe: ASTM A 53rA 53M, black steel, Schedule 40, Type E or S, Grade B. 1. Malleable -Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern. 2. Wrought -Steel Welding Fittings: ASTM A 234/A 234M for butt welding and socket welding. 3. Unions: ASME B16.39, Class 150, malleable iron with brass -to -iron seat, ground joint, and threaded ends. 4. Forged -Steel Flanges and Flanged Fittings: ASME 316.5, minimum Class 150, including bolts, nuts, and gaskets of the following material group, end connections, and facings: a. Material Group: 1.1. b. End Connections: Threaded or butt welding to match pipe. C. Lapped Face: Not permitted underground. d. Gasket Materials: ASME B16.20, metallic, flat, asbestos free, aluminum o-rings, and spiral -wound metal gaskets. e. Botts and Nuts: ASME B18.2.1, carbon steel aboveground and stainless steel underground. 2.2 JOINING MATERIALS A. Joint Compound and Tape: Suitable for natural gas. B. Welding Filler Metals: Comply with AWS D10.1VD10.12M forwelding materials appropriate for wall thickness and chemical analysis of steel pipe being weltletl. C. Brazing Filler Metals: Alloy with melting point greater than 1000 deg F complying with AW S A5.8AS.BM. Brazing alloys containing more than 0.05 percent phosphorus are prohibited. 2.3 MANUAL GAS SHUTOFF VALVES A. See 'Underground Manual Gas Shutoff Valve Schedule" and "Aboveground Manual Gas Shutoff Valve Schedule" Articles for where each valve type is applied in various services. B. General Requirements for Metallic Valves, NPS 2 and Smaller: Comply with ASME 316.33. 1. CWPRating: 125call 2. Threaded Ends: Comply with ASME 31.20.1. 3. Dryseal Threads on Flare Ends: Comply with ASME 31.20.3. 4. Tamperproof Feature: Locking feature for valves indicated in "Underground Manual Gas Shutoff Valve Schedule" and "Aboveground Manual Gas Shutoff Valve Schedule" Articles. 5. Listing: Listed and labeled by an NRTL acceptable to authorities having jurisdiction for valves 1 inch and smaller. 6. Service Mark: Valves 1-114 inches to NPS 2 shall have initials "WOG" permanently marked on valve body. 2.4 PRESSURE REGULATORS A. General Requirements: 1. Single stage and suitable for natural gas. 2. Steel jacket and corrosion -resistant components. 3. Elevation compensator. 4. End Connections: Threaded for regulators NPS 2 and smaller; flanged for regulators NPS 2-12 and larger. B. Appliance Pressure Regulators: Comply with ANSI Z21.1 B. 1. Body and Diaphragm Case: Die-cast aluminum. 2. Springs: Zinc -plated steel; interchangeable. 3. Diaphragm Plate: Zinc -plated steel. 4. Seat Disc: Nitrite rubber. 5. Seal Plug: Ultraviolet -stabilized, mineral -filled nylon. 6. Factory -Applied Finish: Minimum three -layer polyester and polyurethane paint finish. 7. Regulator may include vent limiting device, instead of vent connection, if approved by authorities having jurisdiction. 8. Maximum Inlet Pressure:2 prig. 2.5 OUTDOOR PIPING INSTALLATION A. Comply with the International Fuel Gas Code for installation and purging of natural-gas piping. 2.6 INDOOR PIPING INSTALLATION A. Comply with the International Fuel Gas Code for installation and purging of natural-gas piping. B. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicated locations and arrangements are used ro size pipe and calculate friction loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on Coordination Drawings. C. Arrange for pipe spaces, chases, slots, sleeves, and openings in building structure during progress of construction, to allow for mechanical installations. D. Install piping in concealed locations unless otherwise indicated and except in equipment rooms and service areas. E. Install piping indicated to be exposed and piping in equipment moms and service areas at night angles or parallel to building walls. Diagonal cons are prohibited unless specifically indicated otherwise. F. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal. G. Locate valves for easy access. H. Install natural-gas piping at uniform grade of 2 percent down toward drip and sediment traps. I. Install piping free of sags and bends. J. Install fittings for changes in direction and branch connections. K. Verify final equipment locations for mughing-in. L. Comply with requirements in Sections specifying gas -fired appliances and equipment for roughing -in requirements. M. Drips and Sediment Traps: Install chips at points where condensate may collect, including service -meter outlets. Locate where accessible to permit cleaning and emptying. Do not install where condensate is subject to freezing. 1. Construct chips and sediment taps using We fitting with bottom outlet plugged or capped. Use nipple a minimum length of 3 pipe diameters, but not less than 3 inches long and same see as connected pipe. Install with space below bottom of drip to remove plug or cap. N. Extend relief vent connections forservice regulators, line regulators, and overpressure protection devices to outdoors and terminate with weatherproof vent cap. O. Conceal pipe installations in walls, pipe spaces, utility spaces, above ceilings, below grade or Boors, and in Boorchannels unless indicated to be exposed ro view. P. Concealed Location Installations: Except as specified below, install concealed natural-gas piping and piping installed under the building in containment conduit constructed of steel pipe with welded joints as described in Pad 2. Install a vent pipe from containment condo it to outdoors and terminate with weatherproof vent cop. 1. Above Accessible Ceilings: Natural-gas piping, fittings, valves, and regulators may be installed in accessible spaces without containment conduit. 2. In Floors: Install natural-gas piping with welded or bazedjoints and protective coating in cast -in -place concrete floors. Cover piping to be cast in concrete slabs with minimum of 1-12 inches of concrete. Piping may not be in physical contact with other metallic Structures such as reinforcing not or electrically neutral conductom. Do not embed piping in concrete slabs containing quick -set additives or cinder aggregate. 3. In Floor Channels: Install rate ml-gas piping in floor channels. Channels must have cover and be open to space above cover for ventilation. 4. In Walls or Partitions: Protect tubing installed inside conditions or hollow walls from physical damage using steel striker barriers at rigid supports. a. Exception: Tubing passing through partitions or walls does not require striker barriers. 5. Prohibited Locations: a. Do not install natural-gas piping in or through circulating airducts, clothes ortash chutes, chimneys or gas vents (flues), ventilating duds, or dumbwaiter or elevator shafts. b. Do not install natural-gas piping in solid walls or partitions. Q. Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down. R. Connect branch piping from top or side of horizontal piping. S. Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to each piece of equipment. Unions are not required at flanged connections. T. Do not use natural-gas piping as grounding electrode. U. Install strainer on inlet of each line -pressure regulator and automatic or electrically operated valve. 2.7 VALVE INSTALLATION A. Install manual gas shutoff valve for each gas appliance ahead of corrugated stainless -steel tubing, aluminum, or copper connector. B. Install regulators and overpressure protection devices with maintenance access space adequate for servicing and testing. 2.8 HANGER AND SUPPORT INSTALLATION A. Install hangers for horizontal steel piping with the following maximum spacing and minimum rod sizes: 1. NPS 1 and Smaller Maximum span, 96 inches; minimum rod size, 3B inch. 2. NPS 1-114: Maximum span, 108 inches; minimum rotl size, 3/8 inch. 3. NPS 1-1/2 and NPS 2: Maximum span, 108 inches; minimum rod size, 318 Inch. 4. NPS 2-1/2 to NPS 3-1/2: Maximums an 10 feet minimum rod sze i1/2inch. span, 5. NPS 4 and Larger: Maximum span, 10 feet; minimum rod size, 5/8 inch. 2.9 CONNECTIONS A. Connect to utility's gas main according to utility's procedures and requirements. B. Install natural-gas piping electrically continuous, and bonded to gas appliance equipment grounding conductor of the circuit powering the appliance according to NFPA 70. C. Install piping adjacent to appliances to allow service and maintenance of appliances. D. Connect piping to appliances using manual gas shutoff valves and unions. Install valve within 72 inches of each gas -fined appliance and equipment. Install union between valve and appliances or equipment. E. Sediment Tmps: Install tee fitting with capped nipple in bottom to form drip, as close as practical to inlet of each appliance. SECTION 233113 - METAL DUCTS 1.1 PERFORMANCE REQUIREMENTS A. Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and joint construction, reinforcements, and hangers and supports, shall Complywith SMACNA's "HVAC Duct Construction Standards -Metal and Flexible" and performance requirements and design criteria indicated in "Duct Schedule" Article. PART 2-PRODUCTS 2.1 SINGLE -WALL RECTANGULAR DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" based on indicated staticpressure class unless otherwise indicated. B. Transverse Joints: Selectjoint types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 2-1, "Rectangular Duct/Transveme Joints," forstatic-pressure class, applicable sealing requirements, materials involved, duct -support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 2-2, "Rectangular Duct/Longitudinal Seams," forstatic{rrossure class, applicable sealing requirements, materials involved, duct -support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." D. Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 4, "Fittings and Other Construction "for staticpressure class, applicable sealing requirements, materials involved, duct -support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards -Metal and Flexible." 2.2 SINGLE -WALL ROUND DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated staticpressure class unless otherwise indicated. B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-1, "Round Duct Transverse Joints," for static -pressure crass, applicable sealing requirements, materials involved, ductsuppod intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," for static -pressure class, applicable sealing requirements, materials involved, duct-supflod intervals, and other provisions in SMACNA's "WAG Duct Construction Standards - Metal and Flexible." 1. Fabricate round duds larger than 90 inches in diameter with butt -welded longitudinal seams. 2. Fabricate f Ili ducts larger than 72 inches in width (major dimension) with butl-welded longitudinal seams. D. Tees and Laterals: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards -Metal and Flexible," Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees," for static -pressure class, applicable sealing requirements, materials involved, duct -support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." 2.3 SHEET METAL MATERIALS A. General Material Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"for acceptable materials, material thicknesses, and dud construction methods unless otherwise indicated. Sheet metal materials shall be free of gifting, seam marks, roller marks, stains, discolorations, and other imperfections. B. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M. 1. Galvanized Coating Designation: ]G60] ]G90]. 2. Finishes for Surf aces Exposed to View: Mill phosphatized. 2.4 SEALANT AND GASKETS A. General Sealant and Gasket Requirements: Surface -burning characteristics for sealants and gaskets shall be a maximum flame -spread index of 25 and a maximum smokedeveloped index of 50 when tested according to UL 723; testified by an NRTL. 2.5 HANGERS AND SUPPORTS A. Hanger Rods for Noncorrosive Environments: Cadmium -plated steel rods and nuts. B. Strop and Rod Sizes: Comply with SMACNA's "HVAC Dud Construction Standards - Metal and Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct" C. Steel Cables for Galvanized -Steel Ducts: Galvanized steel complying with ASTM A 603. D. Duct Attachments: Sheet metal screws, blind rivets, or self -tapping metal screws; compatible with duct materials. E. Trapeze and Riser Supports: 1. Supports for Gavanized-Steel Ducts: Galvanized -steel shapes and plates. 2. Supports for SWnlessSteel Ducts: Stainless -steel shapes and plates. 3. Supports for Aluminum Ducts: Aluminum or galvanized steel coated with zinc chromate. 2.6 DUCT INSTALLATION A. Drawing plans, schematics, and diagrams indicate general location and arrangement of duct system. Indicated duct locations, configurations, and arrangements were used to size ducts and calculate friction loss for air -handling equipment sizing and for other design considerations. Install duct systems as indicated unless deviations to layout are approved on Shop Drawings and Coordination Drawings. B. Install tlucts according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" unless otherwise indicated. C. Install round ducts in maximum practical lengths. D. Install ducts with fewest possible joints. E. Install factory- or shop-mbricated fiffings for changes in direction, size, and shape and for branch connections. F. Unless otherwise indicated, install ducts vediwlly and horizontally, and parallel and perpendicular to building lines. G. Install ducts close to walls, overhead construction, columns, and other structural and permanent enclosure elements of building. H. Install ducts with a clearance of 1 inch Plus allowance for insulation thickness. I. Route ducts to avoid passing through transformer vaults and electrical equipment rooms and enclosures. J. Where duds pas through non -fire -rated interior partitions and exterior walls and are Pa 9 exposed to view, cover the opening between the partition and duct or duct insulation with sheet metal flanges of same metal thickness as thehetlud Overlap openings on four sides by at least 1-1/2 inches. K. W here ducts pass through fire -rated interior partitions and exterior walls, install fire tlampers. Comply with requirements in Section 233300 "Air Duct Accessories" for fire and smoke dampers. L. Protect duct interiors from moisture, construction debris and dust, and other foreign materials. 2.7 INSTALLATION OF EXPOSED DUCTWORK A. Protect ducts exposed in finished spaces from being dented, scratched, or damaged. B. Trim duct sealants flush with metal. Create a smooth and uniform exposed bead. Do not use two-part tape sealing system. C. Grind welds to provide smooth surface free of buns, sharp edges, and weld splatter. When welding stainless steel with a No.3 or finish, grind the weltls flush, polish the exposed welds, and most the weltls to remove discoloration caused by welding. D. Maintain consistency, symmetry, and uniformity in the arrangement and fabrication of fittings, hangers and supports, duct accessories, and air outlets. E. Repair or replace damaged sections and finished work that does not comply with these requirements. 2.8 DUCT SEALING A. Seal tlucts for duct static -pressure, seal caases, and leakage classes specftied in "Duct Schedule" Article according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." 2.9 HANGER AND SUPPORT INSTALLATION A. Comply with SMACNA's "HVAC Duct Construction Standards -Metal and Flexible," Chapter 5, "Hangers and Supports." B. Building Attachments: Concrete inserts, powder -actuated fasteners, orstmctual-steel fasteners appropriate for construction materials to which hangers are being attached. 1. Where practical, install concrete inserts before placing concrete. 2. Install powder -actuated concrete fasteners after concrete is placed and completely cured. 3. Use powder -actuated concrete fasteners for standard -weight aggregate concretes or for slabs more than 4 inches thick. 4. Do not use powder -actuated concrete fasteners for lightweight -aggregate concretes or forslabs less than 4 inches thick. 5. Do not use powder -actuated concrete fasteners for seismic restraints. C. Hanger Spacing: Comply with SMACNA's"HVAC Duct Construction Standards - Metal and Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size,"and Table 5-2, "Minimum Hanger Sizes for Round Duct," for maximum hanger spacing; install hangers and supports within 24 inches of each elbow and within 48 inches of each branch intersection. D. Hangers Exposed to View: Threaded rod and angle or channel supports. E. Support vertical ducts with steel angles orchannel secured to the sides of the duct with welds, bolts, sheet metal screws, or blind rivets; support at each floorand at a maximum intervals of 16 feet. F. Install upper attachments to structures. Select and size upper attachments with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used. 2.10 PAINTING A. Paint interior of metal tlucts that are visible through registers and grilles and that do not have duct liner. Apply one coat of flat, black, latex paint over a compatible galvanized -steel primer. Paint materials and application requirements are specified in Section 099113 "Exterior Painting" and Section 099123 "Interior Painting." SECTION 233300 -AIR DUCT ACCESSORIES 1.1 ACTION SUBMITTALS A. Product Data: For each type of product. 1.2 ASSEMBLY DESCRIPTION A. Complywith 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 SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for acceptable materials, material thicknesses, and dud construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discoloration, and other imperfections. 1.3 MATERIALS A. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M. 1. Galvanized Coating Designation: G60. 2. Exposed -Surface Finish: Mill phosphatized. B. 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. A. Standard, Steel, Manual Volume Dampers: 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. McGill AirFlow LLC. b. Nailor Industries Inc. C. Ruskin Company. 2. Standard leakage rating. 3. Suitable for horizontal or vertical applications. 4. Frames: a. Frame: Hat -shaped, 0.094-inch-thick, galvanized sheet steel. b. Mitered and welded corners. C. Flanges for attaching to walls and fiangeless frames for installing in ducts. 5. Blades: a. Multiple or single blade. b. Parallel- or opposeddlade design. c. Stiffen damper blades for stability. d. Galvanized3teel, 0.064 inch thick. 6. Blade Axles: Galvanized steel. 7. Tie Bars and Brackets: Galvanized steel. 1.5 CONTROLDAMPERS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Greenheck Fan Corporation. 2. Nailor Industries Inc. 3. Ruskin Company. B. Low -leakage rating, with linkage outside airstream, and bearing AMCA's Codified Ratings Seal for both air performance and air leakage. C. Frames: 1. Hatshaped. 2. 0.094-inch-thick, galvanized sheet steel. 3. Mitered and welded comers. D. Blades: 1. Multiple blade with maximum blade width of 6Inches. 2. Parallel -and opposed -blade design. 3. Aluminum. 4. or [0.0747-inch-thick dual skin]. 5. Blade Edging: Closed -cell neoprene. 1.6 FIRE DAMPERS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Greenback Fan Corporation. 2. Nailor Industries Inc. 3. Ruskin Company. B. Type: Static and dynamic; rated and labeled according to UL 555 by an NRTL. C. Closing rating in ducts up to 4-inch wit static pressure class and minimum 2000-fpm velocity. D. Fire Rating: 1-12 and 3 hours. E. Frame: Curtain type with blades inside airstream; fabricated with roll -formed, 0.034-inch-thick galvanized steel; with mitered and interlocking comers. F. Mounting Sleeve: Factory -or field -installed, galvanized sheet steel. 1. Minimum Thickness: 0.138 inch thick, as indicated, and of length ro soft 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: Vertical or horizontal as indicated. H. Blades: Roll -formed, interlocking, 0.024-inch-thick, galvanized sheet steel. In place of interlocking blades, use full-length, 0.034-inch-thick, galvanized -steel blade connectors. I. Horizontal Dampers: Include blade lock and stainless -steel closure spring. J. Heat -Responsive Device: Replaceable, 165 deg F rated, fusible links. 1.7 TURNING VANES A. Manufactured Turning Vanes for Metal Ducts: Curved blades of galvanized sheet steel; support with bars perpendicular to blades set; set into vane runners suitable for duct mounting. 1. Acoustic Turning Vanes: Fabricate aidoilshaped aluminum extrusions with pedoreted faces and fibrous -glass fill. B. General Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; Figures 4-3, "Vanes and Vane Runners," and 44, "Vane Support in Elbows" 1.8 DUCT -MOUNTED ACCESS DOORS A. Duct -Mounted Access Doors: Fabricate access panels according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; Figures 7-2, "Duct Access Doors and Panels," and 7-3, "Access Doors - Round Duct" 1. Door: a. Double wall, rectangular. b. Galvanized sheet metal with insulation fill and thickness as indicated for duct pressure class. C. Vision panel. d. Hinges and Latches: 1-by-l-inchbutt or piano hinge and cam latches. e. Fabricate doors airtight and suitable for duct pressure class. 2. Frame: Galvanized sheet steel, with bend -over tabs and foam gaskets. 1.9 DUCTACCESSORY HARDWARE A. Instrument Test Holes: Cast iron or cast aluminum to suit duct material, including screw cap and gasket. Size to allow insertion of pilot tube and othertesting instruments and of length to suit dud -insulation thickness. B. Adhesives: High strength, quick setting, neoprene based, waterproof, and resistant to gasoline and grease. 1.10 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 dud accessories of materials suited to dud 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. Compliance with ASHRAE/IESNA 90.1-2004 includes Section 6.4.3.3.3 -"Shutoff Damper Controls," restricts the use of backdaft tlampers, and requires control tlampers for certain applications. Install Ibackchl ]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. 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 steel volume dampers in steel duds. 2. Install aluminum volume dampers in aluminum ducts. SP-NGA spin • strength • Vega 1111111 FOXFIj CONSIRUCIION LTD. o®axas oevmaoev¢ s �aendo,a VIRTUAL ENERGY SOLUTIONS 6252 W 59th STREET, CHICAGO, IL 60638 312.583.7023 W W W MESCHICAGO.COM #AA26003751 _0 N (0 M W C) U � L rx�l�1 W co L� r U CZ Q UJ) r r L CC � U r `k` 0III l it l l rll/llllll .. NO C. psqIyo el,�i PEI]600637 '? STATE OF i ,¢ VES project number: 190301 sheet title: MECHANICAL SPECIFICATIONS sheet number: M003 ® 2018 Victual Energy Solutions, Inc.