Loading...
HomeMy WebLinkAboutFile Documents.533 E Main St.0004.2017 (5).ACBKSt. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD SECTION 233113 - METAL DUCTS GENERALPART 1 - RELATED DOCUMENTS1.1 Drawings and general provisions of the Contract, including General and SupplementaryA. Conditions and Division 01 Specification Sections, apply to this Section. SUMMARY1.2 Section Includes:A. Single-wall rectangular ducts and fittings.1. Single-wall round ducts and fittings.2. Sheet metal materials.3. Duct liner.4. Sealants and gaskets.5. Hangers and supports.6. Related Sections:B. Section 233116 "Nonmetal Ducts" for fibrous-glass ducts, thermoset fiber-reinforced1. plastic ducts, thermoplastic ducts, PVC ducts, and concrete ducts. Section 233300 "Air Duct Accessories" for dampers, sound-control devices,2. duct-mounting access doors and panels, turning vanes, and flexible ducts. PERFORMANCE REQUIREMENTS1.3 Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and jointA. construction, reinforcements, and hangers and supports, shall comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" and performance requirements and design criteria indicated in "Duct Schedule" Article. Structural Performance: Duct hangers and supports shall withstand the effects of gravity loadsB. and stresses within limits and under conditions described in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements inC. ASHRAE 62.1. METAL DUCTS 233113 - 1/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD ACTION SUBMITTALS1.4 Product Data: For each type of the following products:A. Liners and adhesives.1. Sealants and gaskets.2. Shop Drawings:B. Fabrication, assembly, and installation, including plans, elevations, sections, components,1. and attachments to other work. Factory- and shop-fabricated ducts and fittings.2. Duct layout indicating sizes, configuration, liner material, and static-pressure classes.3. Elevation of top of ducts.4. Dimensions of main duct runs from building grid lines.5. Fittings.6. Reinforcement and spacing.7. Seam and joint construction.8. Penetrations through fire-rated and other partitions.9. Equipment installation based on equipment being used on Project.10. Locations for duct accessories, including dampers, turning vanes, and access doors and11. panels. Hangers and supports, including methods for duct and building attachment and vibration12. isolation. INFORMATIONAL SUBMITTALS1.5 Coordination Drawings: Plans, drawn to scale, on which the following items are shown andA. coordinated with each other, using input from installers of the items involved: Duct installation in congested spaces, indicating coordination with general construction,1. building components, and other building services. Indicate proposed changes to duct layout. Suspended ceiling components.2. Structural members to which duct will be attached.3. METAL DUCTS 233113 - 2/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Size and location of initial access modules for acoustical tile.4. Penetrations of smoke barriers and fire-rated construction.5. Items penetrating finished ceiling including the following:6. Lighting fixtures.a. Air outlets and inlets.b. Speakers.c. Sprinklers.d. Access panels.e. Perimeter moldings.f. Welding certificates.B. QUALITY ASSURANCE1.6 ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems andA. Equipment" and Section 7 - "Construction and System Start-up." ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6.4.4B. - "HVAC System Construction and Insulation." PRODUCTSPART 2 - SINGLE-WALL RECTANGULAR DUCTS AND FITTINGS2.1 General Fabrication Requirements: Comply with SMACNA's "HVAC Duct ConstructionA. Standards - Metal and Flexible" based on indicated static-pressure class unless otherwise indicated. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC DuctB. Construction Standards - Metal and Flexible," Figure 2-1, "Rectangular Duct/Transverse Joints," 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." Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC DuctC. Construction Standards - Metal and Flexible," Figure 2-2, "Rectangular Duct/Longitudinal Seams," 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." Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types andD. fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 4, "Fittings and Other Construction," 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." METAL DUCTS 233113 - 3/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD SINGLE-WALL ROUND DUCTS AND FITTINGS2.2 General Fabrication Requirements: Comply with SMACNA's "HVAC Duct ConstructionA. Standards - Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure class unless otherwise indicated. Manufacturers: Subject to compliance with requirements, available manufacturers1. offering products that may be incorporated into the Work include, but are not limited to, the following: Lindab Inc.a. McGill AirFlow LLC.b. SEMCO Incorporated.c. Sheet Metal Connectors, Inc.d. Spiral Manufacturing Co., Inc.e. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC DuctB. Construction Standards - Metal and Flexible," Figure 3-1, "Round Duct Transverse Joints," 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." Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC DuctC. Construction Standards - Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," 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." Tees and Laterals: Select types and fabricate according to SMACNA's "HVAC Duct ConstructionD. 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." SHEET METAL MATERIALS2.3 General Material Requirements: Comply with SMACNA's "HVAC Duct Construction StandardsA. - 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. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M.B. Reinforcement Shapes and Plates: ASTM A 36/A 36M, steel plates, shapes, and bars; black andC. galvanized. Where black- and galvanized-steel shapes and plates are used to reinforce aluminum1. ducts, isolate the different metals with butyl rubber, neoprene, or EPDM gasket materials. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inchD. minimum diameter for lengths longer than 36 inches. METAL DUCTS 233113 - 4/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD DUCT LINER2.4 Fibrous-Glass Duct Liner: Comply with ASTM C 1071, NFPA 90A, or NFPA 90B; and withA. NAIMA AH124, "Fibrous Glass Duct Liner Standard." Manufacturers: Subject to compliance with requirements, available manufacturers1. offering products that may be incorporated into the Work include, but are not limited to, the following: CertainTeed Corporation; Insulation Group.a. Johns Manville.b. Knauf Insulation.c. Owens Corning.d. Maximum Thermal Conductivity:e. Type I, Flexible: 0.27 Btu x in./h x sq. ft. x deg F at 75 deg F mean1) temperature. Solvent or Water-Based Liner Adhesive: Comply with NFPA 90A or NFPA 90B and2. with ASTM C 916. Insulation Pins and Washers:B. Cupped-Head, Capacitor-Discharge-Weld Pins: Copper- or zinc-coated steel pin, fully1. annealed for capacitor-discharge welding, 0.106-inch- or 0.135-inch- diameter shank, length to suit depth of insulation indicated with integral 1-1/2-inch galvanized carbon-steel washer. Insulation-Retaining Washers: Self-locking washers formed from 0.016-inch- thick2. galvanized steel; with beveled edge sized as required to hold insulation securely in place but not less than 1-1/2 inches in diameter. Shop Application of Duct Liner: Comply with SMACNA's "HVAC Duct Construction StandardsC. - Metal and Flexible," Figure 7-11, "Flexible Duct Liner Installation." Adhere a single layer of indicated thickness of duct liner with at least 90 percent adhesive1. coverage at liner contact surface area. Attaining indicated thickness with multiple layers of duct liner is prohibited. Apply adhesive to transverse edges of liner facing upstream that do not receive metal2. nosing. Butt transverse joints without gaps, and coat joint with adhesive.3. Fold and compress liner in corners of rectangular ducts or cut and fit to ensure4. butted-edge overlapping. Do not apply liner in rectangular ducts with longitudinal joints, except at corners of5. ducts, unless duct size and dimensions of standard liner make longitudinal joints necessary. METAL DUCTS 233113 - 5/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Apply adhesive coating on longitudinal seams in ducts with air velocity of 2500 fpm.6. Secure liner with mechanical fasteners 4 inches from corners and at intervals not7. exceeding 12 inches transversely; at 3 inchesfrom transverse joints and at intervals not exceeding 18 incheslongitudinally. Secure transversely oriented liner edges facing the airstream with metal nosings that have8. either channel or "Z" profiles or are integrally formed from duct wall. Fabricate edge facings at the following locations: Fan discharges.a. Intervals of lined duct preceding unlined duct.b. Upstream edges of transverse joints in ducts where air velocities are higher thanc. 2500 fpm or where indicated. Secure insulation between perforated sheet metal inner duct of same thickness as9. specified for outer shell. Use mechanical fasteners that maintain inner duct at uniform distance from outer shell without compressing insulation. Sheet Metal Inner Duct Perforations: 3/32-inch diameter, with an overall opena. area of 23 percent. Terminate inner ducts with buildouts attached to fire-damper sleeves, dampers, turning10. vane assemblies, or other devices. Fabricated buildouts (metal hat sections) or other buildout means are optional; when used, secure buildouts to duct walls with bolts, screws, rivets, or welds. SEALANT AND GASKETS2.5 General Sealant and Gasket Requirements: Surface-burning characteristics for sealants andA. gaskets shall be a maximum flame-spread index of 25 and a maximum smoke-developed index of 50 when tested according to UL 723; certified by an NRTL. Two-Part Tape Sealing System:B. Tape: Woven cotton fiber impregnated with mineral gypsum and modified1. acrylic/silicone activator to react exothermically with tape to form hard, durable, airtight seal. Tape Width: 3 inches minimum.2. Sealant: Modified styrene acrylic.3. Water resistant.4. Mold and mildew resistant.5. Maximum Static-Pressure Class: 10-inch wg, positive and negative.6. Service: Indoor and outdoor.7. METAL DUCTS 233113 - 6/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Service Temperature: Minus 40 to plus 200 deg F.8. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless9. steel, or aluminum. Water-Based Joint and Seam Sealant:C. Application Method: Brush on.1. Solids Content: Minimum 65 percent.2. Shore A Hardness: Minimum 20.3. Water resistant.4. Mold and mildew resistant.5. VOC: Maximum 75 g/L (less water).6. Maximum Static-Pressure Class: 10-inch wg, positive and negative.7. Service: Indoor or outdoor.8. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless9. steel, or aluminum sheets. Solvent-Based Joint and Seam Sealant:D. Application Method: Brush on.1. Base: Synthetic rubber resin.2. Solvent: Toluene and heptane.3. Solids Content: Minimum 60 percent.4. Shore A Hardness: Minimum 60.5. Water resistant.6. Mold and mildew resistant.7. Maximum Static-Pressure Class: 10-inch wg, positive or negative.8. Service: Indoor or outdoor.9. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless10. steel, or aluminum sheets. Flanged Joint Sealant: Comply with ASTM C 920.E. METAL DUCTS 233113 - 7/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD General: Single-component, acid-curing, silicone, elastomeric.1. Type: S.2. Grade: NS.3. Class: 25.4. Use: O.5. Flange Gaskets: Butyl rubber, neoprene, or EPDM polymer with polyisobutylene plasticizer.F. Round Duct Joint O-Ring Seals:G. Seal shall provide maximum leakage class of3 cfm/100 sq. ft. at 1-inch wg and shall be1. rated for10-inch wg static-pressure class, positive or negative. EPDM O-ring to seal in concave bead in coupling or fitting spigot.2. Double-lipped, EPDM O-ring seal, mechanically fastened to factory-fabricated couplings3. and fitting spigots. HANGERS AND SUPPORTS2.6 Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts.A. Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or galvanized rodsB. with threads painted with zinc-chromate primer after installation. Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction Standards - Metal andC. Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct." Steel Cable End Connections: Cadmium-plated steel assemblies with brackets, swivel, and boltsD. designed for duct hanger service; with an automatic-locking and clamping device. Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws; compatible withE. duct materials. EXECUTIONPART 3 - DUCT INSTALLATION3.1 Drawing plans, schematics, and diagrams indicate general location and arrangement of ductA. 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. METAL DUCTS 233113 - 8/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Install ducts according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"B. unless otherwise indicated. Install round and flat-oval ducts in maximum practical lengths.C. Install ducts with fewest possible joints.D. Install factory- or shop-fabricated fittings for changes in direction, size, and shape and for branchE. connections. Unless otherwise indicated, install ducts vertically and horizontally, and parallel andF. perpendicular to building lines. Install ducts close to walls, overhead construction, columns, and other structural and permanentG. enclosure elements of building. Install ducts with a clearance of 1 inch, plus allowance for insulation thickness.H. Route ducts to avoid passing through transformer vaults and electrical equipment rooms andI. enclosures. Where ducts pass through non-fire-rated interior partitions and exterior walls and are exposed toJ. view, cover the opening between the partition and duct or duct insulation with sheet metal flanges of same metal thickness as the duct. Overlap openings on four sides by at least 1-1/2 inches. Where ducts pass through fire-rated interior partitions and exterior walls, install fire dampers.K. Comply with requirements in Section 233300 "Air Duct Accessories" for fire and smoke dampers. Protect duct interiors from moisture, construction debris and dust, and other foreign materials.L. Comply with SMACNA's "IAQ Guidelines for Occupied Buildings Under Construction," Appendix G, "Duct Cleanliness for New Construction Guidelines." INSTALLATION OF EXPOSED DUCTWORK3.2 Protect ducts exposed in finished spaces from being dented, scratched, or damaged.A. Trim duct sealants flush with metal. Create a smooth and uniform exposed bead. Do not useB. two-part tape sealing system. Grind welds to provide smooth surface free of burrs, sharp edges, and weld splatter. WhenC. welding stainless steel with a No. 3 or 4 finish, grind the welds flush, polish the exposed welds, and treat the welds to remove discoloration caused by welding. Maintain consistency, symmetry, and uniformity in the arrangement and fabrication of fittings,D. hangers and supports, duct accessories, and air outlets. Repair or replace damaged sections and finished work that does not comply with theseE. requirements. METAL DUCTS 233113 - 9/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD DUCT SEALING3.3 Seal ducts for duct static-pressure, seal classes, and leakage classes specified in "Duct Schedule"A. Article according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." HANGER AND SUPPORT INSTALLATION3.4 Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 5,A. "Hangers and Supports." Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel fastenersB. appropriate for construction materials to which hangers are being attached. Where practical, install concrete inserts before placing concrete.1. Install powder-actuated concrete fasteners after concrete is placed and completely cured.2. Use powder-actuated concrete fasteners for standard-weight aggregate concretes or for3. slabs more than 4 inches thick. Do not use powder-actuated concrete fasteners for lightweight-aggregate concretes or for4. slabs less than 4 inches thick. Do not use powder-actuated concrete fasteners for seismic restraints.5. Hanger Spacing: Comply with SMACNA's "HVAC Duct Construction Standards - Metal andC. 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. Hangers Exposed to View: Threaded rod and angle or channel supports.D. Support vertical ducts with steel angles or channel secured to the sides of the duct with welds,E. bolts, sheet metal screws, or blind rivets; support at each floor and at a maximum intervals of 16 feet. Install upper attachments to structures. Select and size upper attachments with pull-out, tension,F. and shear capacities appropriate for supported loads and building materials where used. CONNECTIONS3.5 Make connections to equipment with flexible connectors complying with Section 233300 "AirA. Duct Accessories." Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for branch,B. outlet and inlet, and terminal unit connections. METAL DUCTS 233113 - 10/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD PAINTING3.6 Paint interior of metal ducts that are visible through registers and grilles and that do not have ductA. 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." FIELD QUALITY CONTROL3.7 Perform tests and inspections.A. Leakage Tests:B. Comply with SMACNA's "HVAC Air Duct Leakage Test Manual." Submit a test report1. for each test. Disassemble, reassemble, and seal segments of systems to accommodate leakage testing2. and for compliance with test requirements. Test for leaks before applying external insulation.3. Conduct tests at static pressures equal to maximum design pressure of system or section4. being tested. If static-pressure classes are not indicated, test system at maximum system design pressure. Do not pressurize systems above maximum design operating pressure. Give seven days' advance notice for testing.5. Duct System Cleanliness Tests:C. Visually inspect duct system to ensure that no visible contaminants are present.1. Test sections of metal duct system, chosen randomly by Owner, for cleanliness according2. to "Vacuum Test" in NADCA ACR, "Assessment, Cleaning and Restoration of HVAC Systems." Acceptable Cleanliness Level: Net weight of debris collected on the filter mediaa. shall not exceed 0.75 mg/100 sq. cm. Duct system will be considered defective if it does not pass tests and inspections.D. Prepare test and inspection reports.E. DUCT CLEANING3.8 Clean new and existing duct system(s) before testing, adjusting, and balancing.A. Use service openings for entry and inspection.B. METAL DUCTS 233113 - 11/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Create new openings and install access panels appropriate for duct static-pressure class if1. required for cleaning access. Provide insulated panels for insulated or lined duct. Patch insulation and liner as recommended by duct liner manufacturer. Comply with Section 233300 "Air Duct Accessories" for access panels and doors. Disconnect and reconnect flexible ducts as needed for cleaning and inspection.2. Remove and reinstall ceiling to gain access during the cleaning process.3. Particulate Collection and Odor Control:C. When venting vacuuming system inside the building, use HEPA filtration with 99.971. percent collection efficiency for 0.3-micron-size (or larger) particles. When venting vacuuming system to outdoors, use filter to collect debris removed from2. HVAC system, and locate exhaust downwind and away from air intakes and other points of entry into building. Clean the following components by removing surface contaminants and deposits:D. Air outlets and inlets (registers, grilles, and diffusers).1. Supply, return, and exhaust fans including fan housings, plenums (except ceiling supply2. and return plenums), scrolls, blades or vanes, shafts, baffles, dampers, and drive assemblies. Air-handling unit internal surfaces and components including mixing box, coil section,3. air wash systems, spray eliminators, condensate drain pans, humidifiers and dehumidifiers, filters and filter sections, and condensate collectors and drains. Coils and related components.4. Return-air ducts, dampers, actuators, and turning vanes except in ceiling plenums and5. mechanical equipment rooms. Supply-air ducts, dampers, actuators, and turning vanes.6. Dedicated exhaust and ventilation components and makeup air systems.7. Mechanical Cleaning Methodology:E. Clean metal duct systems using mechanical cleaning methods that extract contaminants1. from within duct systems and remove contaminants from building. Use vacuum-collection devices that are operated continuously during cleaning. Connect2. vacuum device to downstream end of duct sections so areas being cleaned are under negative pressure. Use mechanical agitation to dislodge debris adhered to interior duct surfaces without3. damaging integrity of metal ducts, duct liner, or duct accessories. METAL DUCTS 233113 - 12/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Clean fibrous-glass duct liner with HEPA vacuuming equipment; do not permit duct liner4. to get wet. Replace fibrous-glass duct liner that is damaged, deteriorated, or delaminated or that has friable material, mold, or fungus growth. Clean coils and coil drain pans according to NADCA 1992. Keep drain pan operational.5. Rinse coils with clean water to remove latent residues and cleaning materials; comb and straighten fins. Provide drainage and cleanup for wash-down procedures.6. START UP3.9 Air Balance: Comply with requirements in Section 230593 "Testing, Adjusting, and BalancingA. for HVAC." DUCT SCHEDULE3.10 Supply Ducts:A. Ducts Connected to Fan Coil Units, Furnaces, Heat Pumps, and Terminal Units :1. Pressure Class: Positive 1-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Constant-Volume Air-Handling Units :2. Pressure Class: Positive 2-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 12.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Equipment Not Listed Above:3. Pressure Class: Positive 2-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 12.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Return Ducts:B. Ducts Connected to Fan Coil Units, Furnaces, Heat Pumps, and Terminal Units :1. Pressure Class: Positive or negative 1-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. METAL DUCTS 233113 - 13/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Ducts Connected to Air-Handling Units :2. Pressure Class: Positive or negative 2-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 12.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Equipment Not Listed Above:3. Pressure Class: Positive or negative 2-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 12.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Exhaust Ducts:C. Ducts Connected to Fans Exhausting (ASHRAE 62.1, Class 1 and 2) Air:1. Pressure Class: Negative 1-inch wg.a. Minimum SMACNA Seal Class: A if negative pressure, and A if positiveb. pressure. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Equipment Not Listed Above:2. Pressure Class: Positive or negative 2-inch wg.a. Minimum SMACNA Seal Class: A if negative pressure, and A if positiveb. pressure. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Outdoor-Air (Not Filtered, Heated, or Cooled) Ducts:D. Ducts Connected to Fan Coil Units, Furnaces, Heat Pumps, and Terminal Units :1. Pressure Class: Positive or negative 1-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Air-Handling Units :2. Pressure Class: Positive or negative 2-inch wg.a. Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 24.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Ducts Connected to Equipment Not Listed Above:3. Pressure Class: Positive or negative 2-inch wg.a. METAL DUCTS 233113 - 14/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Minimum SMACNA Seal Class: A.b. SMACNA Leakage Class for Rectangular: 12.c. SMACNA Leakage Class for Round and Flat Oval: 12.d. Intermediate Reinforcement:E. Galvanized-Steel Ducts: Galvanized steel Galvanized steel or carbon steel coated with1. zinc-chromate primer. Liner & Wrap: Unless noted otherwise on drawings, provide the following:F. Supply Air Ducts: In conditioned space: Fibrous glass, Type I, 1 inch thick. In1. unconditioned space: In addition to liner, wrap with 1" external insulation, R-3 minimum to achieve code-minimum R-6 total insulation value. Return Air Ducts: In conditioned space: Fibrous glass, Type I, 1 inch thick. In2. unconditioned space: In addition to liner, wrap with 1" external insulation, R-3 minimum to achieve code-minimum R-6 total insulation value. Exhaust Air Ducts: In unconditioned space: Fibrous glass, Type I, 1 inch thick external3. wrap. Supply Fan Plenums: Fibrous glass, Type II, 2 inch thick.4. Return- Fan Plenums: Fibrous glass, Type II, 2 inches thick.5. Outside Air Duct: 1" thick external wrap, Fibrous glass Type I, R-6 minimum.6. Elbow Configuration:G. Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction Standards -1. Metal and Flexible," Figure 4-2, "Rectangular Elbows." Velocity 1000 fpm or Lower:a. Radius Type RE 1 with minimum 0.5 radius-to-diameter ratio.1) Mitered Type RE 4 without vanes.2) Velocity 1000 to 1500 fpm:b. Radius Type RE 1 with minimum 1.0 radius-to-diameter ratio.1) Radius Type RE 3 with minimum 0.5 radius-to-diameter ratio and two2) vanes. Mitered Type RE 2 with vanes complying with SMACNA's "HVAC3) Duct Construction Standards - Metal and Flexible," Figure 4-3, "Vanes and Vane Runners," and Figure 4-4, "Vane Support in Elbows." Velocity 1500 fpm or Higher:c. Radius Type RE 1 with minimum 1.5 radius-to-diameter ratio.1) Radius Type RE 3 with minimum 1.0 radius-to-diameter ratio and two2) vanes. METAL DUCTS 233113 - 15/16 City of Aspen Received 5/2/17 Building Department St. Mary Catholic Church Aspen, Colorado February 15, 2017 100% CD Mitered Type RE 2 with vanes complying with SMACNA's "HVAC3) Duct Construction Standards - Metal and Flexible," Figure 4-3, "Vanes and Vane Runners," and Figure 4-4, "Vane Support in Elbows." Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction Standards -2. Metal and Flexible," Figure 4-2, "Rectangular Elbows." Radius Type RE 1 with minimum 1.5 radius-to-diameter ratio.a. Radius Type RE 3 with minimum 1.0 radius-to-diameter ratio and two vanes.b. Mitered Type RE 2 with vanes complying with SMACNA's "HVAC Ductc. Construction Standards - Metal and Flexible," Figure 4-3, "Vanes and Vane Runners," and Figure 4-4, "Vane Support in Elbows." Round Duct: Comply with SMACNA's "HVAC Duct Construction Standards - Metal3. and Flexible," Figure 3-4, "Round Duct Elbows." Minimum Radius-to-Diameter Ratio and Elbow Segments: Comply witha. SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Table 3-1, "Mitered Elbows." Elbows with less than 90-degree change of direction have proportionately fewer segments. Velocity 1000 fpm or Lower: 0.5 radius-to-diameter ratio and three1) segments for 90-degree elbow. Velocity 1000 to 1500 fpm: 1.0 radius-to-diameter ratio and four2) segments for 90-degree elbow. Velocity 1500 fpm or Higher: 1.5 radius-to-diameter ratio and five3) segments for 90-degree elbow. Radius-to Diameter Ratio: 1.5.4) Round Elbows, 12 Inches and Smaller in Diameter: Stamped or pleated.b. Branch Configuration:H. Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction Standards -1. Metal and Flexible," Figure 4-6, "Branch Connection." Rectangular Main to Rectangular Branch: 45-degree entry.a. Rectangular Main to Round Branch: Spin in.b. Round and Flat Oval: Comply with SMACNA's "HVAC Duct Construction Standards -2. Metal and Flexible," Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees." Saddle taps are permitted in existing duct. Velocity 1000 fpm or Lower: 90-degree tap.a. Velocity 1000 to 1500 fpm: Conical tap.b. Velocity 1500 fpm or Higher: 45-degree lateral.c. END OF SECTION 233113 METAL DUCTS 233113 - 16/16 City of Aspen Received 5/2/17 Building Department