SECTION 08625
INSULATED TRANSLUCENT SKYLIGHT SYSTEMS
PART 1 - GENERAL
1.01
A.
1.02
A.
RELATED DOCUMENTS
All of the Contract Documents, including General and Supplementary Conditions, and Division 1
General Requirements, apply to the work of this Section.
SUMMARY
The work of this Section includes:
1.
B.
Related Sections: Other Specification Sections, which directly relate to the work of this Section,
include, but are not limited to, the following:
1.
2.
3.
4.
5.
6.
1.03
A.
Design, manufacturing, and installation of the translucent structural polycarbonate skylights as
shown in the architectural drawings including aluminum framing, battens, closures, trim and
flashings.
Section 03300 - Cast-In-Place Concrete.
Section 05120 - Structural Steel.
Section 06100 - Rough Carpentry
Section 07500 - Membrane Roofing.
Section 07620 - Sheet Metal Flashings and Trim
Section 07915 - Sealants, Caulking and Seals.
PERFORMANCE REQUIREMENTS
General: Provide skylights capable of withstanding loads and thermal and structural movements as
required by code without failure. Failure includes the following:
1. Supporting-frame deflection exceeding specified limits.
2. Polycarbonate-insulating-panel deflection exceeding manufacturer’s recommended limits or
causing panel failure.
3. Thermal stresses transferred to the building structure.
4. Noise or vibration created by thermal and structural movement and wind.
5. Loosening or weakening of fasteners, attachments, and other components.
6. Sealant or gasket failure.
7. Uncontrolled water in the integral weep transfer systems.
B.
Design thrust and loading of the framing system including translucent glazing material to support the
following load requirements:
INSULATED TRANSLUCENT SKYLIGHT SYSTEMS
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1.
2.
3.
4.
5.
As required by Local and State code.
Dead Load (25 PSF)
Live Load (20 PSF)
Snow Load (30 PSF)
Seismic load as required by applicable code earthquake zone for project location.
C. Thermal Movement: Provide skylights that are design to allow for thermal movement resulting from the
following maximum changes in ambient and surface temperatures (-______ To +______)
D. Air Infiltration: Provide skylights with maximum air leakage of 0.06-cfm/sq. ft. of surface when tested
according to ASTM E 283 at a minimum static-air-pressure differential of 15 pounds force per square
foot.
E. Water Penetration: Provide skylights that incorporate a weep system when tested according to ASTM
E331 at a minimum static pressure differential of 20 percent of positive design wind load, but not less
than of 15 pounds force per square foot.
1.04
SUBMITTALS
A. Product Data: Submit manufacturer's product data showing compliance with requirements specified
under Paragraph: Performance Requirements. Include both published data and specific data
prepared for this project.
B.
Shop Drawings: Submit shop drawings for approval prior to fabrication. Include detailed plans,
elevations, and details of framing members, translucent glazing materials, sealants, fasteners,
anchors, and thicknesses and types of formed flashing and closures in relationship to adjacent
materials. Indicate maximum horizontal and vertical forces at rafters.
C. Samples: Submit the following samples.
1.
2.
1.05
Aluminum Finish: Submit color charts or range samples for initial color selection. Submit
finished sample of color selected for use.
Translucent Glazing Materials: Submit a verification sample of the specified translucent glazing
material specified.
QUALITY ASSURANCE
A.
Manufacturer: Systems shall be manufactured by a firm with a minimum of ten years experience in
the fabrication and installation of translucent wall and skylight systems. Manufacturers proposed for
use, which are not named in these specifications, shall submit evidence of ability to meet
performance and fabrication requirements specified, and include a list of projects of similar design
and complexity completed within the past five years.
B.
Field installation of skylight shall be by the manufacture. Approved manufacture must have at least
10 years of skylight construction experience.
C.
Materials: For each type of primary material required for the work of this Section, manufacture shall
provide warranties on the primary materials used.
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D.
1.06
Pre-Installation Conference: Schedule and convene a pre-installation conference just prior to
commencement of field operations with installer and installation crew, to establish procedures to
maintain optimum working conditions and to coordinate this work with related and adjacent work.
DELIVERY, STORAGE, AND HANDLING
A.
All materials are to be unit labeled and shipped to site in protective packaging. Storage and
handling is to be provided in strict compliance with manufacturer's instructions and
recommendations, including storing panels on the long edge several inches above ground, blocked
and under cover to prevent warping. Protect from damage from sunlight, weather, excessive
temperatures and construction operations.
B.
Sequence deliveries to avoid delays, but minimize on-site storage.
1.07
A.
1.08
A.
PROJECT CONDITIONS
Field Measurements: When practical, take accurate field measurements of all openings before
preparation of shop drawings and fabrication. As to not delay job progress "guaranteed dimensions"
will be accepted if approved by the responsible contractor.
WARRANTY
System Warranty: Provide written warranty signed by manufacturer, agreeing to repair or replace
work, which exhibits defects in materials or workmanship.
1.
C.
Warranty Period: 5 year limited warranty from date of completion.
Translucent Glazing Material Warranty: Provide written warranty as provided by manufacturer,
agreeing to repair or replace glazing materials, which exhibit defects in materials or workmanship.
1.
Warranty Period: 10 years from date of manufacture.
PART 2 - PRODUCTS
2.01
ACCEPTABLE MANUFACTURERS
A.
Approved skylight systems manufactured by GSI Glazed Structures Inc., 350 Center St.,
Grayslake, IL 60030; telephone 847-223-4500, fax 847-223-6444. www.gsiskylights.com
B.
Substitute manufacturers shall not be considered unless they have been approved in writing no less
than ten days prior to bid date. Only those manufacturers shall be considered as approved suppliers
with products in strict conformity with this Section of the specification and with the Contract drawing
details. Complete details and specifications must accompany requests for approval from skylight
manufacture.
2.02
A.
PANEL CONSTRUCTION
Provide seven layer dual cross pattern extruded polycarbonate composite panels complying with the
INSULATED TRANSLUCENT SKYLIGHT SYSTEMS
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following:
1.
2.
3.
4.
B.
Each glazing panel within the skylight system shall be designed to span a 4-ft wide bay as a onepiece panel. No standing seam or interlocking polycarbonate clip design panels to make up this bay
spacing will be approved. All panel connection joints must be sealed off from dirt and outside
elements.
1.
2.
3.
4.
5.
C.
2.
3.
4.
5.
A.
Each 4’ wide polycarbonate panel shall be sealed around the entire perimeter by a continuous
extruded aluminum channel and gasketed on both sides of the system with a minimum capture
of 1” to allow for expansion and contraction of the polycarbonate panel.
Composite polycarbonate panels shall be glazed flush within the glazing system, no standing
seam or interlocking clips or through fasteners shall be used to secure the panels to the
structure.
A continuos uni-directional breathable fiberglass weep baffle to stop the infiltration of foreign
materials into the polycarbonate sheet and allow the panel to breath shall seal all open ends of
the polycarbonate panel.
Composite panel design shall incorporate a weep transfer system to the exterior.
All horizontal and vertical extrusion members shall be designed to mechanically interlock to
insure fit, water transfer and strength of the composite panel system and anchored with
concealed stainless steel screws into the interior screw boss.
Composite Panel Performance:
1.
2.03
Thickness of composite panel framing shall be 25mm
Insulating Value of panel: U-factor of .26
Translucent polycarbonate panel color as selected from manufacturer's standard colors. (Clear
Light Transmission 69%, Opal Light Transmission 42%, and Bronze Light Transmission 35%)
No exposed fasteners will be allowed in the composite panel framing.
Impact resistance - Polycarbonate sheets withstand the impact of 16 lb dropped 25' without
breakage.
Impact tests - Exceeds Gardner Falling Dart limits; no rupture from 1/2" radius tip at 220 ft/lb.
No penetration, 100 ft/lb involving air cannon with 1 1/2" diameter tip at 95 mph
Hail Impact Tests - Exceeds ASTM E822 requirements.
Ignition Properties - Sheets are tested in accordance with ASTM D1929. Model codes typically
require Light Transmitting Plastic to have a self-ignition temperature of 650 degrees F (343
degrees C) or greater. Polycarbonate sheets meet this requirement with a self-ignition
temperature of 986 degrees. Polycarbonate sheets melt at 800 degrees F
Flame spread - Polycarbonate sheets are tested in accordance with ASTM E84. Model
building codes typically do not specify a flame spread requirement. Values vary with thickness
and range from 10 - 80. Polycarbonate sheets meet National Fire Protection Association
(NFPA) Class A and UBC Class 1.
COMPONENTS AND ACCESSORIES
Composite Panel Structure: Extruded aluminum alloy 6063-T5 or 6063-T6
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B.
Structural Sub-Framing: Structural tube system shall be fabricated of extruded aluminum alloy
6063-T6 designed to receive the factory glazed panel system. All interior gussets, clips, and
connection are to be concealed within the structure tube system. No exposed interior fasteners in
the tube framing are to be allowed.
C.
Exposed Flashing and Closures: Aluminum sheet, minimum 0.40” thick and finished to match panelframing system.
D.
Anchor Fasteners: Manufacturer’s standard corrosion-resistant, non-staining, non-bleeding
fasteners and accessories compatible with adjacent materials.
1. Connections to supporting structure: ASTM A 307, zinc-coated steel fasteners.
E.
Structural Fasteners: All fasteners shall be 310 stainless.
1.
2.
3.
4.
5.
Movement Joints: Provide slip-joint linings, spacers, and sleeves of material and type
recommended by manufacturer.
Aluminum-Retaining-Cap Fasteners: ASTM A 193/A 193 M, Series 300 stainless steel screws;
type as recommended by manufacturer.
Anchor Bolts: ASTM A 307, Grade A, zinc-coated steel anchor bolts.
Concrete or Masonry Inserts: Zinc-coated cast-iron, malleable-iron, or steel inserts; hot-dip
galvanized according to ASTM A 123
Shims: Non-staining, nonferrous shims compatible with adjacent material, for installing and
aligning skylight.
F. Skylight-System Sealants: Dow-795 silicone seals applied to all joints, flashing, and closures as
required in the skin system to provide seal of expansion joints.
G. Bituminous Paint: Cold-applied asphalt mastic paints complying with SSPC-Paint 12, except containing
no asbestos, and formulated for 30-mil thickness per coat.
H. Battens and Perimeter Closure Systems: Extruded aluminum alloy 6063-T6 or 6063-T5, for screw
clamp-tight closure system. Fasten to panels with Type 304 self-tapping stainless steel screws.
Receiving channels for screws shall be continuous, with length of each member extruded as part of the
member.
2.04
A.
ALUMINUM FINISHES
Provide the following finish for interior and exterior exposed aluminum surfaces.
All aluminum components shall be mechanically processed for proper adhesion of paint. All paint
shall be thermo set electrostatic powder coat paint. Painting process shall be done “in-house” to
maintain quality control, warrantees, and sole responsibility of skylight system. Color (Dupont,
Morton standards, architect shall specify). Paint shall pass Mandrel Bending Test ISO1519/ASTM
D522 Results 5/32 in/4mm. Impact test 1/10 in. Distortion ISO 6272/ STMD 2794-90 up to 40 in./lbs
2.05
FABRICATION
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A.
Framing Components: As follow:
1.
2.
3.
4.
5.
6.
7.
8.
9.
B.
Fabricate components that, when assembled, will have accurately fitted joints with ends coped,
mitered, or butted to produce hairline joints free of burrs and distortion.
Fabricate components to drain water-passing joints and to drain condensation and moisture
occurring or migration within skylight system to the 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 polycarbonate insulating panels and skin system is
thermally isolated from the structural-framing members.
Form shapes with sharp profiles, straight and free of defects or deformations, before finishing.
Fit and assemble components to greatest extent practicable before finishing.
Reinforce members as required to retain fastener threads.
Where fasteners are exposed to view, countersink fastener heads and finish them to match
framing.
Before shipping, shop-assemble, mark and disassemble components that cannot be
permanently shop assembled.
Fabricate flashing with weatherproof expansion joints and corners.
C. Prepare framing to receive anchor and connection devices and fasteners.
PART 3 - EXECUTION
3.01
PREPARATION
1.
2.
3.02
Take field dimensions and examine conditions of substrates, supports, and other conditions
Under which this work is to be performed and notify Contractor, in writing, of circumstances
detrimental to the proper completion of the work.
Do not proceed with work until unsatisfactory conditions are corrected.
INSTALLATION
A.
Installation shall be completed by an approved manufacture with no less than 10 years of
experience in composite panel installation. Installed in strict compliance with manufacturer's
instructions and recommendations. Match profiles, sizes and spacing indicated on approved shop
drawings. Ensure that weep and condensation control system operates properly.
B.
Coordinate installation with adjacent work such as roofing, sheet metal and other work to ensure
creation of a complete weatherproof assembly. Anchor work securely to supporting structure, but
allow for differential and thermal movement.
C.
Isolate between aluminum and dissimilar metals with a protective coating or barrier to prevent
electrolytic corrosion.
3.03
A.
ADJUSTING, CLEANING AND PROTECTION
During installation, remove labels, part number markings, sealant smears, handprints, and
INSULATED TRANSLUCENT SKYLIGHT SYSTEMS
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construction dirt from all components.
B.
Touch-up damaged coatings and finishes and repair minor damage to eliminate all evidence of
repair. Remove and replace work, which cannot be satisfactorily repaired.
C.
Clean all exposed surfaces at time of installation including metal and glass using non-abrasive
materials and methods recommended by manufacturer of material or product being cleaned.
Remove and replace work that cannot be successfully cleaned.
END OF SECTION
© 2002 GSI Glazed Structures Inc. All Rights Reserved.
A copyright license to reproduce this specification and computer disk is hereby granted to
non-manufacturing architects, specification writers, and designers.
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