1.1 MANUFACTURERS
A. Basis-of-Design Product: Subject to compliance with requirements, provide products of VELUX America Inc., Greenwood, SC 29648. (888) 878-3589.
2.5 PERFORMANCE REQUIREMENTS
A. Unit Skylight Standard, 22 inch Unit: AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS-11 or previous):
1. Performance Grade (Primary Designator): TDDCC/TDDOC-PG150.
2. Design Pressure (DP): +300/-150 psf (+14.4/-7.2 kPa).
3. Water Test Pressure: 15 psf (0.72 kPa) with no leakage at 5 gallons per minute spray rate.
4. Air Leakage Rate: 0.30 cfm/ft2 maximum.
Specifier: Delete first four Subparagraphs above and retain first four Subparagraphs below for IBC 2009 and NBC code requirements, including CSA A440S1-09; verify requirements of authorities having jurisdiction.
5. Performance Class and Grade (Primary Designator) CW-PG110.
6. Design Pressure (DP): +200/-110 psf (+9.58/-5.27 kPa).
7. Water Test Pressure: 15 psf (0.72 kPa) with no leakage at 5 gallons per minute spray rate.
8. Canadian Air Infiltration/Exfiltration Rating: A2. (1.5 L/s/m2 maximum)
B. Unit Skylight Standard, 22 inch (559 mm) Unit: AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS-11 or previous):
Specifier: Retain first four Subparagraphs below and delete following four Subparagraphs for IBC 2012 and 2015 code requirements; verify requirements of authorities having jurisdiction.
1. Performance Grade (Primary Designator): TDDCC/TDDOC-PG130.
2. Design Pressure (DP): +300/-130 psf (+14.4/-6.22 kPa).
3. Water Test Pressure: 15 psf (0.72 kPa) with no leakage at 5 gallons per minute spray rate.
4. Air Leakage Rate: 0.30 cfm/ft2 maximum
Specifier: Delete first four Subparagraphs above and retain first four Subparagraphs below for IBC 2009 and NBC code requirements, including CSA A440S1-09; verify requirements of authorities having jurisdiction.
5. Performance Class and Grade (Primary Designator): CW-PG100.
6. Design Pressure (DP): +200/-100 psf (+9.58/-4.79 kPa).
7. Water Test Pressure: 15 psf (0.72 kPa) with no leakage at 5 gallons per minute spray rate.
8. Canadian Air Infiltration/Exfiltration Rating: A2 (1.5 L/s/m2 maximum).
C. Daylighting: Provide daylighting photometric performance comparable to basis of design product at layout indicated, based upon daylighting profile of March 21, 9:00 am local time, at Project location by simulation in accordance with IESNA guidelines.
D. Air Infiltration: Maximum air leakage through unit of 0.30 cfm/sq. ft. (1.5 L/s/sq. m) of fixed area as determined according to ASTM E 283 at a static-air-pressure differential of 1.57 lbf/sq. ft. (75Pa.)
E. Water Penetration under Static Pressure: No evidence of water penetration through unit when tested according to ASTM E 331 at a static-air-pressure differential of 15 lbf/sq. ft. (720 Pa).
Specifier: Retain "Windborne Debris Resistance" Paragraph if required by authorities having jurisdiction. Select optional polycarbonate glazing when retaining this Paragraph.
F. Windborne-Debris Resistance: Provide tubular unit skylights capable of resisting impact from windborne debris, based on the pass/fail criteria as determined from testing glazed representative of those specified, according to ASTM E 1886 and ASTM E 1996.
1. Missile Level C, Wind Zone 3 requirements, and +50/-50 psf cycle pressure minimum.
G. Surface-Burning Characteristics of Plastic Glazing: Provide plastic glazing meeting NAFS and identical to specimens tested for fire-exposure behavior in accordance with test method indicated below by a testing and inspecting agency acceptable to authorities having jurisdiction. Identify materials with appropriate markings of applicable testing and inspecting agency.
1. Self-Ignition Temperature: 650 deg F (345 deg. C) or more for plastic glazing in thickness indicated when tested per ASTM D 1929.
2. Smoke-Production Characteristics: Comply with either requirement below:
a. Smoke-Developed Index: 450 or less when tested per ASTM E 84 on plastic glazing in manner indicated for application.
b. Smoke Density: 75 or less when tested per ASTM D 2843 on plastic glazing in thickness indicated for application.
3. Burning Characteristics: Tested and labeled in accordance with ASTM D 635.
a. Plastic Glazing for Domes: [Polycarbonate Class CC1] [Acrylic Class CC2].
H. Fire Ratings for Roof Assemblies with Fire Classifications: Tubular unit skylight with dome edge protection band tested in accordance with ASTM E 108 and listed as passing Burning Brand test with target classification of Class B
I. Energy Performance with Energy Kit Installed:
1. Thermal Transmittance: NFRC 100 maximum U-factor:
a. 14 inch (356 mm) Units: 0.55 Btu/hr*ft2*deg F (3.12 W/m2*deg C).
b. 22 inch (559 mm) Units: 0.43 Btu/hr*ft2*deg F (2.44 W/m2*deg C).
2. Solar Heat-Gain Coefficient (SHGC): NFRC 200 maximum SHGC:
a. 14 inch (356 mm) Units: 0.28.
b. 22 inch (559 mm) Units: 0.22.
Specifier: Retain "Electrical Components" Paragraph below if retaining requirement for dimmer.
J. Electrical Components: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.
K. Fall Protection Standard Compliance: 29 CFR 1910.23: Passed.
2.6 MATERIALS
A. Galvanized-Steel Sheet: ASTM A 653/A 653M, G90 (Z275) coating, either commercial steel or forming steel.
B. Aluminum Sheet: Flat sheet complying with ASTM B 209/B 209M.
C. Bituminous Coating: SSPC-Paint 12, solvent-type, bituminous mastic, nominally free of sulfur and containing no asbestos fibers, formulated for 15-mil dry film thickness per coating.
D. Joint Sealants: As specified in Section 079200 "Joint Sealants."
E. Mastic Sealants: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.
F. Roofing Cement: ASTM D 4586, asbestos free, designed for trowel application or other adhesive compatible with roofing system.
2.7 FINISHES
A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.
B. Appearance of Finished Work: Noticeable variations in same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast.
C. Galvanized Steel Sheet:
1. Baked-Enamel or Powder-Coat Finish: AAMA 2603 except with a minimum dry film thickness of 1.5 mils (0.04 mm). Comply with coating manufacturer's written instructions for cleaning, conversion coating, and applying and baking finish.
a. Color and Gloss: Neutral gray.
4.3 
