08 60 45_AM 6.pdf

REPAIR BUILDING 606, GENERAL INSTRUCTION BUILDING W912DS19C0034

USMA, WEST POINT, NY PN 94078

SECTION 08 60 45

SKYLIGHTS

08/20

PART 1 GENERAL

1.1 SUMMARY

Provide commercially available metal framed skylights which satisfy all requirements contained in this section and have been verified by load testing and independent design analyses (if required) to meet specified design requirements. Provide UV-stabilized, shatterproof and energy efficient skylight systems. Provide light transmitting plastics in the manufacturing of skylights for daylighting applications. Systems must meet requirements of UFC 4-010-01 .

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)

AAMA 1503 (2009) Voluntary Test Method for Thermal Transmittance and Condensation Resistance of Windows, Doors and Glazed Wall Sections

AAMA 2605 (2020) Voluntary Specification, Performance Requirements and Test Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and Panels

ASTM INTERNATIONAL (ASTM)

ASTM E283 (2019) Standard Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

ASTM E330/E330M (2014; R 2021) Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E331 (2000; R 2016) Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

NATIONAL FENESTRATION RATING COUNCIL (NFRC)

NFRC 100 (2020) Procedure for Determining Fenestration Product U-Factors

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NFRC 200 (2020) Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence

U.S. DEPARTMENT OF DEFENSE (DOD)

UFC 4-010-01 (2018; with Change 1, 2020) DoD Minimum Antiterrorism Standards for Buildings

1.3 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Shop Drawings ; G, AE

SD-03 Product Data

Skylights ; G, AE

Warranty

SD-05 Design Data

Calculations

SD-06 Test Reports t est r eports

SD-07 Certificates

Systems

Qualifications

1.4 QUALITY ASSURANCE

a. Provide documentation of Qualifications for the following: The manufacturer is a company specializing in the manufacture of the specified products with a minimum of 10 years documented experience.

The installer has documented experience of 5 years minimum performing the work specified.

1.5 DELIVERY, STORAGE, AND HANDLING

Provide factory assembled system modules to the greatest extent possible.

Ship panels to the jobsite in rugged shipping units, ready for erection.

Affix conspicuous decals on all skylights warning individuals against sitting or stepping on the units. Store skylight panels on the long edge, several inches above the ground, blocked and under cover to prevent warping. Deliver unit skylights in manufacturer's original containers, SECTION 08 60 45 Page 2 dry, undamaged, with seals and labels intact. Deliver, store and protect all products in accordance with manufacturer's recommendations.

1.6 WARRANTY

Provide the manufacturer's complete warranty for materials, workmanship, and installation. The warranty is for 5 years from the time of project completion and with no proration. The warranty must guarantee, but not be limited to, the following:

a. Provide a single source warranty for the weathertight performance of the combined glazing panel and framing system.

b. Finish Warranty: Provide written warranty signed by manufacturer agreeing to repair or replace work with finish defects. "Defects" is defined as peeling, chipping, chalking, fading, abnormal aging or deterioration, and failure to perform as required. The warranty is for 20 years from the time of project completion with no proration.

c. Glass performance beyond skylight warranty period to be as specified in Section 08 81 00 .

PART 2 PRODUCTS

2.1 SKYLIGHTS

2.2 SKYLIGHT SYSTEMS

Submit manufacturer's certificate that the systems meet or exceed specified requirements. Provide systems evaluated and listed (the whole skylight and glazing panel as a unit, not just the glazing material in the unit) by the recognized building code authorities: ICC and SBCCI-Public Safety Testing and Evaluation Services Inc. Product ratings determined using NFRC 100 and NFRC 200 must be authorized for certification and properly labeled by the manufacturer. Provide skylight and glazing panel systems meeting the following requirements:

a. Integral perimeter framing system assembly by the manufacturer.

b. Energy Performance: Maximum U-Factor of 0.050 Btu/sq. ft. x h x deg F ad determined according to NFRC 100. Glazing panel as specified in Section 08 80 00 "Glazing"

c. Air infiltration at 1.57 psf less than 0.04 cfm/ft 2 and at 6.24 psf less than 0.0 6 cfm/ft 2 in accordance with ASTM E283.

d. Water penetration at test pressure of 12 psf equals zero in accordance with ASTM E331.

e. Condensation Resistance Factor: Combined performance of framing and glass of not less than 45 in accordance with AAMA 1503.

f . Manufacturer is responsible for maximum system deflection, in accordance with the applicable building code, and without damage to system performance. Calculate deflection in accordance with engineering principles.

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g. Incorporate weepage elements within the perimeter framework of the glazing system for drainage of any condensation or water penetration.

h. System must accommodate movement within the system; movement between the system and perimeter framing components; dynamic loading and release of loads; and deflection of supporting members. Limit framing member deflection normal to glazing plane to 1/175. Achieve this without damage to system or components, deterioration of weather seals and fenestration properties specified.

i . Exposed aluminum color to be as specified in Exterior Finish Legend on Drawings. Provide corrosion resistant superior-performance organic finish in accordance with AAMA 2605 with total dry film thickness of not less than 1.2 mils .

j . Provide a system requiring no scheduled recoating to maintain its performance or for UV resistance.

k. Design criteria:

(1) Wind Load as indicated on Drawings

(2) Snow load as indicated on Drawings

(3) Concentrated load: 250 lbs applied to cener of framing span.

(4) Structural Performance: Provide metal-framed skylights, including anchorage, capable of withstanding 60 PSF positive and 30 PSF negative test pressure without material and deflection failures and permanent deformation of structural members exceeding 0.2 percent of span when tested according to ASTM E330/E330M .

l . Use 6063-T6 and 6063-T5 extruded aluminum; all fasteners of stainless steel or plated steel.

2.2.1 Glass Glazed Skylights

Provide roof windows to withstand dead and live loads caused by pressure and uplift of wind acting normal to the plane of roof and tested by an ICC listed, independent testing and quality control inspection agency the downward pressure and an uplift pressure as indicated .

2.2.1.1 Fixed Skylight

Fixed skylight featuring extruded aluminum frame memebers with gaskets to drain any condensation to the outside, and insulated glazing.

2.2.2 Framed Skylights

Framed skylights must be designed to indicated size, configuration and slope; determine rafter and purlin spacing by loading requirements.

Skylights manufactured in prefabricated sections easy to install are available in a wide range of standardized pitches. Provide tubular or I-beam framing members; deflection of rafters not to exceed L/180 of the rafter span. A registered professional engineer must size all framing members and design all structural connections; submit a copy of the calculations . Framing includes a primary gutter system with secondary gutters to control water infiltration and condensation runoff from the underside of the glazing material and channel it to the exterior. Design

SECTION 08 60 45 Page 4 skylight structural members for live load and wind load as indicated on Drawings ; do not induce objectionable distortion or stress in fastenings and joinery due to expansion and contraction when subjected to a 100 degree F temperature change.

2.3 FLEXIBLE SEALING TAPE

Provide manufacturer's standard pre-applied sealing tape to closure system at the factory under controlled conditions.

2.4 GLAZING

Provide as indicated in Section 08 81 00 GLAZING

PART 3 EXECUTION

3.1 EXAMINATION

Field verify all submitted opening sizes, dimensions and tolerances;

preparation of openings includes isolating dissimilar materials from aluminum system to avoid damage by electrolysis. The installer must examine area of installation to verify readiness of site conditions and to notify the Contractor about any defects requiring correction. Verify when structural support is ready to receive all specified work and to convene a pre-installation conference, if approved by the Contracting Officer, including the Contractor, skylight installer and all parties directly affecting and affected by the specified work. Do not install any materials that show visual evidence of biological growth due to the presence of moisture. Do not commence work until conditions are satisfactory.

3.2 ERECTION

Erect skylight system in accordance with the approved shop drawings supplied by the manufacturer. Submit drawings showing fabrication details, materials, dimensions, installation methods, anchors, and relationship to adjacent construction. Fasten and seal in accordance with the manufacturer's shop drawings. Remove all panel, after other trades have completed work on adjacent materials. Carefully inspect and adjust panel installation as necessary to ensure proper installation and weather-tight conditions. Provide all staging, lifts and hoists required for the complete installation and field measuring. Install system clean of dirt, debris or staining and thoroughly examined for removal of all protective material prior to final inspection of the designated work area. Do not use snow rakes on roof windows or skylights. Provide test reports .

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