FA3047-10-R-0012 Atch 2AH-Division 8

802 CONS/LGCA-3 FA3047-10-R-0012

Lackland AFB TX Roofing IDIQ

08 62 00

Section J – Attachment 2AH Page 1 of 10 8 Feb 2010

SECTION 08 62 00

SKYLIGHTS

PART 1 GENERAL

1.1 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 1600(2000) Voluntary Specification for Skylights

AAMA 2605(2005) Voluntary Specification, Performance Requirements and Test

Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and

Panels

ASM INTERNATIONAL (ASM)

ASM STFA(2001; 6th Ed) The Surface Treatment and Finishing of Aluminum and Its

Alloys (2 Vol.)

ASTM INTERNATIONAL (ASTM)

ASTM C 297/C 297M(2004) Flatwise Tensile Strength of Sandwich Constructions

ASTM D 1002(2005) Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded

Metal Specimens by Tension Loading (Metal-to-Metal)

ASTM D 1003(2007e1) Haze and Luminous Transmittance of Transparent Plastics

ASTM D 1037(2006a) Evaluating Properties of Wood-Base Fiber and Particle Panel

Materials

ASTM D 1929(1996; R 2001e1) Determining Ignition Temperature of Plastics

ASTM D 2843(1999; R 2004e1) Density of Smoke from the Burning or Decomposition of Plastics

ASTM D 3841(1997e1; R 2008) Standard Specification for Glass Fiber-Reinforced

Polyester Plastic Panels

Section J – Attachment 2AH Page 2 of 10 8 Feb 2010

ASTM D 572(2004) Rubber Deterioration by Heat and Oxygen

ASTM D 635(2006) Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position

ASTM E 108(2007a) Fire Tests of Roof Coverings

ASTM E 283(2004) Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

ASTM E 331(2000; R 2009) Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E 72(2005) Conducting Strength Tests of Panels for Building Construction

ASTM E 84(2009a) Standard Test Method for Surface Burning Characteristics of

Building Materials

NATIONAL FENESTRATION RATING COUNCIL (NFRC)

NFRC 100(2004) Procedure for Determining Fenestration Product U-Factors

NFRC 200(2004) Procedure for Determining Fenestration Product Solar Heat Gain

Coefficient and Visible Transmittance at Normal Incidence

1.2 SYSTEM DESCRIPTION

Furnish and install commercially available unit skylights, domed, pyramidal, vaulted, or metal framed, 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 environmentally preferable products and work practices, applicable to skylights, considering raw materials acquisition, production, manufacturing, packaging, distribution, reuse, operation, maintenance, and/or disposal of the products or services used in the skylights. The skylight system shall be UV-stabilized, shatter proof and energy efficient. The plastics used in the manufacture of the skylights shall be light transmitting plastics for daylighting applications.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Section J – Attachment 2AH Page 3 of 10 8 Feb 2010

Shop Drawings; G

Drawings showing fabrication details, materials, dimensions, installation methods, anchors, and relationship to adjacent construction.

SD-03 Product Data

Skylights

Manufacturer's descriptive data and catalog cuts.

Warranty

Manufacturer's 5 year complete warranty.

SD-06 Test Reports

Test Reports

Certified test reports from independent testing laboratory for each type and class of panel system. Reports shall verify that the material meets apecified performance requirements. Previously completed test reports will be acceptable if they are current and indicative of products used on this project. Where a Class A, B or C roof is part of the project, a listing certificate for roof covering systems category shall be provided certifying that the product complies with the safety standards of ASTM E 108 and the

Uniform Building Code.

SD-07 Certificates

Skylights; G

Manufacturer's certificate stating that products meet or exceed specified requirements.

Skylight system shall be evaluated and listed (the whole skylight as a unit, not just a 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 shall be authorized for certification and properly labeled by the manufacturer.

Qualifications

Documentation of manufacturer's and installer experience indicating compliance with specified requirements.

1.4 QUALITY ASSURANCE

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a. Provide documentation of Qualifications for the following: The manufacturer shall be a company specializing in the manufacture of the specified products with a minimum of 5 years documented experience. The installer shall have documented experience of 5 years minimum performing the work specified.

b. Before fabrication, provide a full service mock-up of each type of skylight complete with glass and AAMA certification label for structural purposes and NFRC temporary and Permanent Label for certification of thermal performance rating for review of skylight construction and quality of hardware operation.

1.5 DELIVERY, STORAGE, AND HANDLING

System modules shall be factory assembled to the greatest extent possible. Panels shall be shipped to the jobsite in rugged shipping units and shall be ready for erection. All skylights shall have conspicuous decals affixed warning individuals against sitting or stepping on the units. Skylight panels shall be stored on the long edge, several inches above the ground, blocked and under cover to prevent warping. Deliver unit skylights in manufacturer's original containers, dry, undamaged, with seals and labels intact. All products shall be delivered, stored and protected in accordance with manufacturer's recommendations.

1.6 WARRANTY

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

a. Light transmission and color of the panels shall not change after exposure to heat of

300 degrees F for 25 minutes.

b. There is no delamination of the panel affecting appearance, performance, weatherability or structural integrity of the panels or the completed system.

c. There is no fiberbloom on the panel face.

d. Change in light transmission of no more than 6 percent in accordance with ASTM D

1003, and in color (yellowing index) no more than 10 points in comparison to the original specified value over a 10 year period.

PART 2 PRODUCTS

2.1 SKYLIGHT PANELS

Skylight panels shall be fabricated of glass-fiber reinforced polyester or extruded cellular thermoplastic polycarbonate panels conforming to the specified requirements and other

Section J – Attachment 2AH Page 5 of 10 8 Feb 2010 appropriate lab test specified criteria, weighing not less than 8 ounces/square foot.

Submit Test Reports as specified in the Submittals paragraph. Size and color of skylight panels shall be as indicated.

2.2 GLASS-FIBER PANELS

Glass-fiber reinforced polyester panels shall conform to ASTM D 3841, Class 1 and to the requirements of AAMA 1600.

2.2.1 Weatherability

The exposed faces of fiberglass sandwich type panels shall have a permanent glass veil erosion barrier embedded integrally to provide maximum long term resistance to reinforcing fiber exposure. The exterior face sheet shall be uniform in strength and be resistant to penetration by pencil point.

2.2.2 Non Combustible Grid Core

The aluminum I-beams shall be 6063-T6 with provisions for mechanical interlocking of muntin-mullion and perimeter to prevent high and low intersections which do not allow full bonding surface to contact with face material. Width of I-beam shall be no less than

7/16 inch. I-beam grid shall be machined to tolerances of not greater than plus or minus

0.002 inch for flat panels. Panels shall withstand 1200 degrees F fire for a minimum of one hour without collapse or exterior flaming.

2.2.3 Adhesive

The laminate adhesive shall be heat and pressure resin-type engineered for structural sandwich panel use. Adhesive shall pass testing requirements specified by the

International Conference of Building Officials' "Acceptance Criteria for Sandwich Panel

Adhesive". Minimum strength shall be:

a. Tensile Strength of 750 psi in accordance with ASTM C 297/C 297M after two exposures to six cycles each of the aging conditions prescribed in ASTM D 1037.

b. Shear Strength, after exposure to five separate aging conditions in accordance with

ASTM D 1002, shall be:

(1) 540 psi at 50% relative humidity and 73 degrees F.

(2) 800 psi under accelerated aging in accordance with ASTM D 1037 at room temperature.

(3) 250 psi under accelerated aging in accordance with ASTM D 1037 at 182 degrees F.

(4) 1400 psi after 500 hour Oxygen Bomb in accordance with ASTM D 572.

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(5) 100 psi at 182 degrees F.

2.2.4 Panel Construction

Provide panels consistimg of fiberglass faces laminated to an aluminum I-beam grid core and deflecting no more than 1.9 inches at 30 psf in 10 feet in accordance with ASTM E

72, without a supporting frame. Quality control inspections and required testing, conducted at least once each year, shall include manufacturing facilities, sandwich panel components and production sandwich panels for conformance with "Acceptance Criteria for Sandwich Panels" as regulated by the ICC-ES or equivalent.

2.3 THERMOPLASTIC POLYCARBONATE PANELS

The system shall be manufactured from translucent polycarbonate panels designed for architectural applications. Provide panels consisting of a polycarbonate resin with a permanent, co-extruded, ultra-violet protective layer; this layer shall be co-extruded by the manufacturer during the original extrusion of the panel and shall be a permanent part of the exterior and interior layers. Pot-applied coatings or films of dissimilar materials are unacceptable. Panel width shall not exceed 2 feet to ensure best performance for wind uplift, vibration, oil canning and visual appearance. The following manufacturing requirements shall be met:

a. Panel shall be extruded in one single formable length. Transverse sections are unacceptable. The panels shall be manufactured with upstands which are integral to the unit, and the upstands shall be 90 degrees to the panel face (standing seam dry glazed concept). Welding or gluing of upstands or standing seam is unacceptable.

b. Mullions shall be dry glazed profiles, using no sealant, welding, adhesives or gaskets;

mullions shall be thermally broken and continuous for panel length.

c. For structural performance, the use of adhesives, plastic or sonic welding or sealant is not allowed.

d. For longevity, the minimum ratio of panel weight to thickness shall be 0.91 psf for

2.2, 3, and 4 inch double glazed thick panel.

e. The extruded panel shall include integral extruded multi-cells, and truss-like structural core for resistance to buckling. The panel's exterior skins shall be interconnected and spaced apart by supporting ribs, perpendicular to the skins, at a spacing not to exceed

0.16 inches (truss-like construction). In addition, the space between the two exterior skins in a cross section shall be divided by multiple parallel intermediate surfaces, at a spacing not to exceed 0.16 inches.

f. Interior flame spread classification shall be Class I in accordance with ASTM E 84.

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g. Smoke density shall be no greater than 70 in accordance with ASTM D 2843.

h. The exterior and interior faces shall be an approved light transmitting panel with a

CC1 fire rating classification in accordance with ASTM D 635.

i. Self-ignition shall be greater than 1058 degrees F in accordance with ASTM D 1929.

j. Fire rated roof assembly translucent panels shall be successfully evaluated for fire from exterior exposure per ASTM E 108 to meet Class A rating. The panel shall be listed by an independent recognized listing laboratory.

2.4 COMMON PANEL REQUIREMENTS

2.4.1 Appearance

The face sheets shall be uniform in color to prevent splotchy appearance. Faces shall be completely free of ridges and wrinkles which prevent proper surface contact. Clusters of air bubbles/pinholes which collect moisture and dirt are not acceptable.

2.4.2 Panel Fabrication

Panel construction shall meet the following requirements: Light transmission, minimum

38 percent and color, white or as indicated.

2.4.3 Thermal Performance

Thermal transmittance for skylights with insulating glass shall not exceed a U-factor of

0.75 Btu/hr-ft2-F when determined using NFRC 100, and a SHGC of 0.40 Btu/hr-ft2-F when determined using NFRC 200 and as determined by the DOE Energy Star Windows program.

2.4.4 Thermal Break and Condensation Weeps

Provide unit skylight with thermal break and condensation weeps that drain to exterior.

2.5 SKYLIGHT SYSTEMS

Provide skylight systems meeting the following requirements:

a. Integral perimeter framing system assembly shall be by the manufacturer.

b. Exterior panel faces shall be white in color. Interior panel faces shall be white in color.

c. Air infiltration at 6.24 psf shall be less than 0.1 cfm/ft2 in accordance with ASTM E

283.

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d. Water penetration at test pressure of 15 psf shall be zero in accordance with ASTM E

331.

e. Manufacturer shall be responsible for maximum system deflection, in accordance with the applicable building code, and without damage to system performance. Deflection shall be calculated in accordance with engineering principles.

f. Proper weepage elements shall be incorporated within the perimeter framework of the glazing system for drainage of any condensation or water penetration.

g. System shall accommodate movement within the system; movement between the system and perimeter framing components; dynamic loading and release of loads; and deflection of supporting members. This shall be achieved without damage to system or components, deterioration of weather seals and fenestration properties specified.

h. The exterior panel face shall repel an impact of 60 foot-pounds without fracture or tear when impacted by a 3.5 inch diameter, 6.37 pound free falling ball. Impact strength shall be measured by the Society of Plastics Industries (SPI) method.

i. Exposed aluminum color shall be selected from the manufacturer's standard range.

Corrosion resistant finish shall be oven dried Kynar 500, two coats where color is indicated, or anodized finish complying with ASM STFA, in accordance with AAMA

2605.

j. The system shall require no scheduled recoating to maintain its performance or for UV resistance.

k. Provide unit skylight assembly and installation to withstand an uplift pressure calculated in accordance with ASCE 7-05 for field, perimeter and corner zones, as outlined in FM Loss Prevention Data Sheet 1-29 revised 2009. Wind uplift calculator is available at: https://roofnav.fmglobal.com.

l. Extruded aluminum shall be 6063-T6 and 6063-T5; all fasteners shall be stainless steel or cadmium plated steel.

2.5.1 Plastic Glazed Unit Skylight

2.5.1.1 Dome

Dome skylights shall be factory assembled units each consisting of sealed double or triple domes with 0.06 inch extruded aluminum frame with a polyurethane thermal break to prevent condensation on the interior portion of the frame and 0.07 inch extruded aluminum retainer cap. The skylight shall have an integral condensation gutter with weep hole slots to provide sufficient drainage to the outside. Dome shall be white. For self-flashing domes, the curbs, treated wood nailer, and insulation shall be the

Section J – Attachment 2AH Page 9 of 10 8 Feb 2010 manufacturer's standard. Uniform design load capacity of composite dome and frame shall meet or exceed 40 psf snow load. Provide insulated curbs with PVC thermal barriers connecting the top and bottom of the inner and outer walls.

2.5.1.2 Pyramid

Pyramid skylights are, for all practical purposes, just a configuration alternative to the dome skylights; the requirements specified above for the domes shall apply to the pyramids. Pyramid skylight units are available from 4 to 20 foot square and can be used for both self-flashing or curb mount installations; 22 and 40 degrees are standard.

Maximum horizontal thrust load on the pyramid curb shall be 90 to 330 lbs (1 panel per side), 410 to 730 lbs (2 panels per side) or 850 to 1300 lbs (4 panels per side) depending on size. Pyramids are available in grid and tandem models.

2.5.1.3 Vault

Vault skylights shall be double glazed. Barrel vault height, for low rise vaults, shall be

10% of the vault width, and 50% of the vault width for half round vaults; outside curbs shall be provided by the Contractor in accordance with the manufacturer's details. Vaults shall support a 30 or 40 psf roof snow or live load, and a negative 25 psf wind load plus dead load; rafter spacing shall be determined by load requirements but shall not exceed

36 inches on center for 40 psf and 48 inches on center for 30 psf. Sill members shall weep water infiltration and condensation, and shall be factory slotted at anchors for thermal movement. All gaskets shall be EPDM. All units over 87 inches shall be shipped unassembled for access to anchors from roof level.

2.5.2 Framed Skylights

Framed skylights shall be designed to indicated size; rafter and purlin spacing shall be determined by loading requirements. Skylights manufactured in prefabricated sections easy to install are available in a wide range of standardized pitches. Framing members shall be tubular or I-beams; deflection of rafters shall not exceed L/180 of the rafter span.

A registered professional engineer shall size all framing members and design all structural connections; the Contractor shall submit a copy of the calculations. Framing shall include 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. Skylight structural members shall be designed for a live load as required by the

Contracting Officer and wind load as described in paragraph 2.5 SKYLIGHT SYSTEMS, subparagraph k; no objectionable distortion or stress in fastenings and joinery due to expansion and contraction shall be induced when subjected to a 100 degree F temperature change.

2.6 FLEXIBLE SEALING TAPE

Sealing tape shall be manufacturer's standard pre-applied to closure system at the factory under controlled conditions.

Section J – Attachment 2AH Page 10 of 10 8 Feb 2010

PART 3 EXECUTION

3.1 EXAMINATION

Field verify all submitted opening sizes, dimensions and tolerances; preparation of openings shall include isolating dissimilar materials from aluminum system to avoid damage by electrolysis. The installer shall 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 commence work until conditions are satisfactory.

3.2 ERECTION

Erect translucent skylight system in accordance with the approved shop drawings supplied by the manufacturer. Fastening and sealing shall be in accordance with the manufacturer's shop drawings. All panel protection shall be removed and, after other trades have completed work on adjacent materials, panel installation shall be carefully inspected and adjusted, if necessary, to ensure proper installation and weather-tight conditions. All staging, lifts and hoists required for the complete installation and field measuring shall be provided. System shall be installed clean of dirt, debris or staining and thoroughly examined for removal of all protective material prior to final inspection of the designated work area. Snow rakes shall not be used on roof windows/skylights.

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