Provide Domed Plastic Unit Skylights As Follows and Where Noted

MPS Master SECTION 08 62 13

DOMED UNIT SKYLIGHTS

PART - GENERAL

SUMMARY

Section Includes:

Provide domed plastic unit skylights as follows and where noted:

Curb Mounted Double Standard Dome Plastic Unit Skylight Curb Mounted Double Pyramid Dome Plastic Unit Skylight Deck Mounted Double Standard Dome Plastic Unit Skylight With Integral Curb Deck Mounted Double Pyramid Dome Plastic Unit Skylight With Integral Curb

PERFORMANCE REQUIREMENTS

General: Provide unit skylights capable of withstanding loads as prescribed by prevailing code for Project location.

Unit Skylight Standard: Comply with AAMA/WDMA/CSA 101/I.S.2/A440 for definitions and minimum standards of performance, materials, components, accessories, and fabrication.

Uniform Load:

Skylights shall meet or exceed a uniform design load capacity of 40 psf positive and 40 psf negative load.

Skylights shall support a minimum positive and negative load of 60 psf per requirements of American Architectural Manufacturer’s Association (AAMA) Publication “Voluntary Uniform Load Structural Standard for Plastic Domed Skylights” (AAMA 1606-82).

Impact Test: Units shall be impact tested to 775 foot-pounds to comply with intent of OSHA fall protection regulation 29 CFR 1910.23(e)(8), without a safety screen.

Air Infiltration: Unit skylights shall meet the requirements of ASTM E283 that allows a maximum air infiltration of 0.06 cfm of total glazed surface area.

Water Infiltration: Unit skylights shall meet the requirements of ASTM E547/E331 that allows for no water infiltration at a test pressure of 12 psf.

SUBMITTALS

General: Provide submittals in accordance with Section 01 33 00.

Product Data: Provide complete specifications; description of materials, construction, and finishes; and details of components for product provided.

Shop Drawings: Include plans, elevations, sections, dimensions, anchorage, sealants, and flashings and connections to structure.

Samples For Selection: Provide manufacturer’s color charts showing full range of colors

08 62 13 - 1 Domed Plastic Unit Skylights MPS Master SECTION 08 62 13

available for glazing and aluminum finish when Architect to select if specified.

Aluminum Finish Sample: Provide sample of aluminum finish.

Glazing Sample: Provide sample of glazing in color and finish being provided.

Sample Warranty: Provide sample of manufacturer’s warranty.

QUALITY ASSURANCE

Manufacturer Qualifications: A manufacturer capable of fabricating unit skylights that meet or exceed performance requirements indicated and of documenting this performance by inclusion in lists and by labels, test reports, and calculations.

Installer Qualifications: An installer acceptable to unit skylight manufacturer for installation of units required for this Project.

WARRANTY

General: Warranties specified in this Section shall not deprive Owner of other rights that Owner may have under other provisions of the Contract Documents and shall be in addition to and run concurrent with other warranties made by Contractor under requirements of the Contract Documents.

Skylight Warranty: Provide written warranty signed by manufacturer, agreeing to repair or replace work that exhibits defects in materials or workmanship and guaranteeing weathertight and leak-free performance. “Defects” is defined as uncontrolled leakage of water and abnormal aging or deterioration of metals, metal finishes, and other components.

Warranty Period: 5 years from date of Substantial Completion.

Glazing Warranty: Provide written warranty signed by manufacturer agreeing to repair or replace work that has or develops defects in the plastic. “Defects” is defined as abnormal aging or deterioration.

Warranty Period: 5 years from date of Substantial Completion against yellowing or breakage.

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.

Warranty Period For Anodized Finish: 5 years from date of Substantial Completion. Warranty Period For Polyester Powdercoat: 5 years from date of Substantial Completion. Warranty Period For Kynar 500 Finish: 20 years from date of Substantial Completion.

PART - PRODUCTS

MANUFACTURERS

Acceptable Manufacturers: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows or Owner approved equal:

Wasco Products, Inc.

MATERIALS - GENERAL

Curb Mounted Frame: Either of the following:

Fabricated from high performance PVC with minimum effective thickness of 0.060 inch with integral condensation gutter system and corners fully welded.

Fabricated from 6063-T5/T6 aluminum extrusion, minimum thickness of 0.060 inch, thermally broken, with integral condensation gutter system, corners welded using heliarc process.

Retainer Cap: Extruded aluminum alloy 6063-T5, minimum thickness of 0.060 inch, welded corners.

Glazing Gasket: Manufacturer’s standard.

Glazing/Domes: Either of the following:

Acrylic Glazing:

Material: ASTM D4802, thermoformable, monolithic sheet, category as standard with manufacturer, Finish 1 (smooth or polished), Type UVF (formulated with UV absorber). Double Glazed Dome: Profile: Standard Dome has 25 percent rise, Pyramid has 30-degree slope. Thickness: Not less than thickness required to exceed performance requirements specified. Outer Dome Color: Colorless, transparent or White, translucent as shown on Drawings. Inner Dome Color: Colorless, transparent or White, translucent as shown on Drawings. Self-Ignition Temperature: 650 degrees F or more for plastic sheets in thickness indicated when tested in accordance with ASTM D1929. Smoke-Production Characteristics: Smoke-developed index of 450 or less when tested in accordance with ASTM E84, and smoke density of 75 or less when tested in accordance with ASTM D2843. Burning Characteristics: Tested in accordance with ASTM D635, Class CC2, burning rate of 2 1/2 inches per minute or less for nominal thickness of 0.060 inch or thickness indicated for use.

Fasteners: Same metal as metal being fastened, non-magnetic stainless steel, or other non-corrosive metal as recommended by manufacturer. Finish exposed fasteners to match material being fastened.

Where removal of exterior exposed fasteners might allow access to building, provide non-removable fastener heads.

FABRICATION - GENERAL

Framing Components: Skylight framing shall meet the following requirements:

Factory fit and assemble components.

Fabricate components that, when assembled, will have accurately fitted joints with ends coped or mitered to product hairline joints free of burrs and distortion.

Fabricate components to drain water passing joints and to drain condensation and moisture occurring or migrating within skylight system to exterior.

Fabricate components to accommodate expansion, contraction, and field adjustment, and to provide for minimum clearance and shimming at skylight perimeter.

Fabricate components to ensure that glazing is thermally and physically isolated from framing members.

Form shapes with sharp profiles, straight and free of defects or deformations, before finishing.

Fit and secure joints in aluminum by heliarc welding.

CURB MOUNTED DOME PLASTIC UNIT SKYLIGHT

General: Factory-assembled, curb mounted unit skylight, consisting of a double plastic dome, inner curb mounted frame with flashing flange designed to be mounted on a field fabricated curb, outer retainer cap which secures glazing, and gasketing to provide a weathertight assembly. Unit skylight to meet performance requirements specified.

Dome Profile: Refer to Article 2.02.

Dome Color Selection: Refer to Article 2.02.

Unit Skylight Shape and Size: Refer to Drawings.

DECK MOUNTED DOME PLASTIC UNIT SKYLIGHT WITH INTEGRAL CURB

General: Factory-assembled, deck mounted unit skylight, consisting of a double plastic dome, inner frame with flashing flange that is incorporated into an integral curb by skylight manufacturer, outer retainer cap which secures glazing, and gasketing to provide a weathertight seal. Unit skylight to meet performance requirements specified.

Factory Fabricated Curb: Manufacturer’s formed or extruded aluminum curb fabricated from 6063-T5/T6 aluminum, consisting of minimum 0.060-inch thick aluminum frame and minimum 0.032-inch curb walls, with minimum of 1-inch thick fiberglass insulation between curb walls. Curb to have integral condensation gutter and weep holes for drainage to exterior. Curb to have flange for incorporating curb into roof system.

Corners welded using heliarc process.

Curb height to be 12 inches.

Dome Profile: Refer to Article 2.02.

Dome Color Selection: Refer to Article 2.02.

Unit Skylight Shape and Size: Refer to Drawings.

MISCELLANEOUS MATERIALS

Weatherseal For Curb Mounted Skylights: Expanded polyethylene manufactured by Williams Seals and Gaskets or Owner approved equal, subject to requirements of the Contract Documents.

EXPOSED ALUMINUM FINISH

General: In accordance with NAAMM “Metal Finishes Manual” recommendations for application and designations of finishes.

Finish: Finish designations prefixed by AA conform to the system for designations of aluminum finishes established by the Aluminum Association.

Clear Anodized Finish, Class I: AA-C22A41 in accordance with AAMA 611.

Clear Anodized Finish, Class I: AA-C22A42 in accordance with AAMA 611.

Color: ______

Kynar Fluoropolymer 2-Coat System: 70 percent PVDF in accordance with AAMA 2605.

Color: ______; 3-Coat and 4-Coat Available If Specified.

PART - EXECUTION

EXAMINATION

General: Examine substrates and conditions, with installer present, for compliance with requirements for installation tolerances and other conditions affecting skylight performance.

Proceed with installation only after unsatisfactory conditions have been corrected.

INSTALLATION

General: In accordance with manufacturer’s written instructions for protecting, handling, and installing skylight components.

Coordination:

Coordinate with installation of roof deck and other substrates to receive skylight units.

Coordinate with installation of vapor barriers, roof insulation, roofing, and flashing as required to ensure that each element of the work performs properly and that combined elements are waterproof and weathertight.

Anchorage: Anchor units securely to supporting structural substrates, adequate to withstand

lateral and thermal stresses as well as inward and outward loading pressures.

Isolation: Where metal surfaces of units are to be installed in contact with non-compatible metal or corrosive substrates, including wood, apply bituminous coating on concealed metal surfaces or provide other permanent separation.

Weatherseal For Curb Mounted Skylights: Glue weatherseal to curb and let glue dry before setting skylight on curb.

CLEANING

Cleaning of Plastic Skylights:

Clean exposed metal and plastic surfaces in accordance with manufacturer’s instructions. Touch up damaged metal coatings.

Clean plastic skylight units, inside and out, no more than 5 days prior to date of Substantial Completion.

END OF SECTION

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