SECTION 233113 - METAL DUCTS Updated 7/2016
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Single wall rectangular ducts and fittings.
2. Double wall rectangular ducts and fittings.
3. Single wall round [and flat oval] ducts and fittings.
4. Double wall round [and flat oval] ducts and fittings.
5. Sheet metal materials.
6. Duct liner.
7. Sealants and gaskets.
8. Hangers and supports.
9. Seismic restraint devices.
B. Related Sections:
1. Section230593 "Testing, Adjusting, and Balancing for HVAC" for testing, adjusting, and balancing requirements for metal ducts.
2. Section233116 "Nonmetal Ducts" for Glass Mineral Wool ducts, thermoset fiber reinforced plastic ducts, thermoplastic ducts, PVC ducts, and concrete ducts.
3. Section233119 "HVAC Casings" for factory and field fabricated casings for mechanical equipment.
4. Section233300 "Air Duct Accessories" for dampers, sound control devices, duct mounting access doors and panels, turning vanes, and flexible ducts.
1.3 REFERENCE STANDARDS
A. ASTM International (ASTM).
B. American Society of Heating, Refrigerating, and Air Conditioning Engineers, Inc. (ASHRAE).
C. North American Insulation Manufacturers Association (NAIMA).
D. National Fire Protection Association (NFPA).
E. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA).
F. Underwriters Laboratories (UL).
G. Underwriters Laboratories Environmental (UL Environment).
H. UL 2824 – GREENGUARD Certification Program Method for Measuring Microbial Resistance from Various Sources Using Static Environmental Chambers.
1.4 DEFINITIONS
A. Thermal Conductivity (K value): Units of Btu-inch/hour per square foot per degree F.
B. UL GREENGUARD: Provides independent third party, Indoor Air Quality (IAQ) certification of products for emissions of respirable particles and Volatile Organic Compounds (VOC's), including formaldehyde and other specific product related pollutants. Certification is based upon criteria used by EPA, OSHA, and WHO.
C. EPA: Environmental Protection Agency.
D. WHO: World Health Organization.
E. Glass Mineral Wool: Interchangeable with fiber glass, but replacing the term in the attempt to disassociate and differentiate Glass Mineral Wool from the potential health and safety risk of special purpose or reinforcement products that do not meet the bio solubility criteria of insulation made from glass. Rock Mineral Wool will replace the traditional Mineral Wool label. Both are used in lieu of the Mineral Fiber label.
F. ECOSE® Technology: a revolutionary binder chemistry that enhances the sustainability of products. The "binder" is the bond that holds the Glass Mineral Wool product together and gives the product its shape and brown color. ECOSE Technology is a plant based sustainable chemistry that replaces the phenol formaldehyde (PF) binder traditionally used in Glass Mineral Wool products. Products using ECOSE Technology are formaldehyde free and have greater reduced global warming potential than compared to products of the past.
G. UL GREENGUARD Gold Certification: (formerly known as GREENGUARD Children & Schools Certification) offers stricter certification criteria, considers safety factors to account for sensitive individuals (such as children and the elderly), and ensures that a product is acceptable for use in environments such as schools and healthcare facilities. It is referenced; by both The Collaborative for High Performance Schools (CHPS) and the Leadership in Energy Environmental Design (LEED) Building Rating Systems.
H. UL Environment Formaldehyde Free Verification Requirements: For a product to be verified as formaldehyde free, product samples must have a measured emission factor of less than or equal to 5 µg/m²h at 24 elapsed hours or 3 µg/m²h at 336 elapsed hours. An emission factor of
5µg/m²h corresponds to measured chamber concentration of 2.5 µg/m³ for a typical building ratio of 0.5 m²/m³. This chamber concentration is comparable to, or below typical outdoor air concentrations. This demonstrates that the formaldehyde exposure from products labeled as formaldehyde free will not contribute to airborne formaldehyde concentrations at greater levels than those found in the natural outdoor environment.
I. Declare and The Living Building Challenge – The Living Building Challenge is a philosophy, advocacy tool and certification program that addresses development at all scales. The purpose of The Living Building Challenge is to define the most advanced measure of sustainability in the built environment today and acts to diminish the gap between current limits and ideal solutions. Declare supports The Living Building Challenge by providing a transparent materials database that project teams can select from to meet Imperative 11.
J. Imperative 11, Red List – requires that manufacturers disclose the ingredients in their products to insure that they are free of Red List chemicals and materials. The Red List represents the “worst in class” materials, chemicals and elements known to pose serious risks to human health and the greater ecosystem.
K. Underwriter’s Laboratories Environment (UL Environment): offers independent green claims validation, product assessment and certification. UL GREENGUARD provides third party credibility for sustainable products.
L. UL Environment Claims Validation (ECV): service and label tests a manufacturer’s product and validates that the environmental claims they make in their marketing and packaging materials are factual. This Environmental Claims Validation (ECV) service will allow manufacturers to verify that their products contain a quantifiable amount of recycled content and, as such, help limit raw material extraction and reduce landfill waste. It also will enable products to qualify for LEED® points under Pilot Credit 43: MR – Certified Products.
M. EUCEB: exonerated fiber from a health and safety standpoint by the European Certification Board process.
N. Recycled Content: materials such as bottled glass collected at curbside or other collection sites after consumer use and/or materials used or created from one manufacturing process which are collected as scrap and placed back into another manufacturing process rather than being placed in a landfill or incinerated.
O. Polybrominated diphenyl ethers (PBDE) such as Penta-BDE, Octa-BDE or Deca-BDE fire retardants: have been linked to adverse health effects after exposure in low concentrations.
P. UL Classified: UL has tested and evaluated samples of the product with respect to certain properties of the product. UL Classifies products to:
1. Applicable UL requirements.
2. Standards for safety.
3. Standards of other National and International organizations.
Q. EPD: Environmental Product Declaration. A third party verified document that reports environmental data of products based on the Life Cycle Assessment (LCA) and other relevant information, and in accordance with the International Standard ISO 14025 (Type III Environmental Declarations).
1.5 PERFORMANCE REQUIREMENTS
A. Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and joint 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.
B. Structural Performance: Duct hangers and supports [and seismic restraints] shall withstand the effects of gravity [and seismic] loads and stresses within limits and under conditions described in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" [and] [ASCE/SEI7.] [SMACNA's "Seismic Restraint Manual: Guidelines for Mechanical Systems."] <Insert document.
1. Seismic Hazard LevelA: Seismic force to weight ratio, 0.48.
2. Seismic Hazard LevelB: Seismic force to weight ratio, 0.30.
3. Seismic Hazard LevelC: Seismic force to weight ratio, 0.15.
C. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE62.1.
1.6 ACTION SUBMITTALS
A. Product Data: For each type of the following products:
1. Liners and adhesives.
2. Sealants and gaskets.
3. Seismic restraint devices.
B. EPD Submittals: As certified by UL Environment.
C. LEED Submittals:
1. Product Data for PrerequisiteIEQ1: Documentation indicating that duct systems comply with ASHRAE62.1, Section5 - "Systems and Equipment."
2. Product Data for PrerequisiteEA2: Documentation indicating that duct systems comply with ASHRAE/IESNA90.1, Section6.4.4 - "HVAC System Construction and Insulation."
3. Leakage Test Report for PrerequisiteEA2: Documentation of work performed for compliance with ASHRAE/IESNA90.1, Section6.4.4.2.2 - "Duct Leakage Tests."
4. Duct Cleaning Test Report for PrerequisiteIEQ1: Documentation of work performed for compliance with ASHRAE62.1, Section7.2.4 - "Ventilation System Start-up."
5. Product Data for CreditIEQ4.1: For adhesives and sealants, documentation including printed statement of VOC content.
6. Laboratory Test Reports for CreditIEQ4: For adhesives and sealants, documentation indicating that products comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."
7. Product Data for Credit MR 5 Regional Materials: For products and materials to comply with requirements for regional materials, provide documentation indicating location of product or material manufacturing location and the point of extraction, harvest, or recovery for each raw material. Include distance to Project, contractor cost for each regional material, and percent by weight that is considered regional.
8. LEED v 4, Product Data for Credit EA 2: For products and materials significant to the energy performance of a structure, provide documentation that indicates that insulation levels are significant to increasing the level of energy performance beyond the prerequisite standard.
9. LEED v 4, Product Data for Credit MR 2: For products and materials to comply with Building Product Disclosure & Optimization, provide data/evidence that substantiates Environmental Product Declaration and Multi Attribute Optimization requirements.
10. LEED v 4: Product Data for Credit MR 3: For products and materials to comply with requirements for regional materials, provide documentation indicating location of product or material, manufacturing location and the point of extraction, harvest, or recovery for each raw material. Include distance to Project, contractor cost for each regional material, and percent by weight that is considered regional.
11. LEED v 4, Product Data for Credit MR 4: For products having recycled content documentation; indicating percentages by weight of post-consumer and pre-consumer recycled content. Include statement indicating cost for each product having recycled content.
12. LEED v 4, Product Data for Credit EQ 2: For products and materials to comply with low emittance standards, provide documentation substantiating that insulation products comply with requisite low emittance standards.
13. LEED v 4, Product Data for Credit EQ 5: For products and materials to meet the standard for both thermal comfort design and thermal comfort control, provide data to support; that insulation products are significant to thermal comfort design and thermal comfort control.
14. LEED v 4, Product Data for Credit EQ 9: For products and materials that contribute to the design and performance of workspaces that promote occupants well-being, productivity, and communication, provide data/documentation supporting acoustical benefits of Glass Mineral Wool insulation products.
D. Shop Drawings:
1. Fabrication, assembly, and installation, including plans, elevations, sections, components, and attachments to other work.
2. Factory and shop-fabricated ducts and fittings.
3. Duct layout indicating sizes, configuration, liner material, and static pressure classes.
4. Elevation of top of ducts.
5. Dimensions of main duct runs from building grid lines.
6. Fittings.
7. Reinforcement and spacing.
8. Seam and joint construction.
9. Penetrations through fire rated and other partitions.
10. Equipment installation based on equipment being used on Project.
11. Locations for duct accessories, including dampers, turning vanes, and access doors and panels.
12. Hangers and supports, including methods for duct and building attachment [seismic restraints] and vibration isolation.
13. Insert lists of areas or systems requiring Shop Drawings.
E. Delegated Design Submittal:
1. Sheet metal thicknesses.
2. Joint and seam construction and sealing.
3. Reinforcement details and spacing.
4. Materials, fabrication, assembly, and spacing of hangers and supports.
5. Design Calculations: Calculations [including analysis data signed and sealed by the qualified professional engineer responsible for their preparation] for selecting hangers and supports [and seismic restraints].
1.7 INFORMATIONAL SUBMITTALS
A. Coordination Drawings: Plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved:
1. Duct installation in congested spaces, indicating coordination with general construction, building components, and other building services. Indicate proposed changes to duct layout.
2. Suspended ceiling components.
3. Structural members to which duct will be attached.
4. Size and location of initial access modules for acoustical tile.
5. Penetrations of smoke barriers and fire rated construction.
6. Items penetrating finished ceiling including the following:
a. Lighting fixtures.
b. Air outlets and inlets.
c. Speakers.
d. Sprinklers.
e. Access panels.
f. Perimeter moldings.
g. Insert item>.
B. Welding certificates.
C. Field quality control reports.
1.8 QUALITY ASSURANCE
A. Welding Qualifications: Qualify procedures and personnel according to [AWSD1.1/D1.1M, "Structural Welding Code - Steel," for hangers and supports.] [AWSD1.2/D1.2M, "Structural Welding Code - Aluminum," for aluminum supports.] [AWSD9.1M/D9.1, "Sheet Metal Welding Code," for duct joint and seam welding.]
B. Welding Qualifications: Qualify procedures and personnel according to the following:
1. AWSD1.1/D1.1M, "Structural Welding Code - Steel," for hangers and supports.
2. AWSD1.2/D1.2M, "Structural Welding Code - Aluminum," for aluminum supports.
3. AWSD9.1M/D9.1, "Sheet Metal Welding Code," for duct joint and seam welding.
C. ASHRAE Compliance: Applicable requirements in ASHRAE62.1, Section5 - "Systems and Equipment" and Section7 - "Construction and System Start-up."
D. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA90.1, Section6.4.4 - "HVAC System Construction and Insulation."
E. Surface Burning Characteristics: For insulation and related materials, UL/ULC Classified per UL 723 or meeting ASTM E 84, by a testing agency acceptable to authorities having jurisdiction. Factory label insulation and jacket materials and adhesive, mastic, tapes, and cement material containers, with appropriate markings of applicable testing agency.
1. Insulation Installed Indoors: Flame spread index of 25 or less, and smoke developed index of 50 or less.
2. Insulation Installed Outdoors: Flame spread index of 75 or less, and smoke developed index of 150 or less.