Rev 05/2012
CLEARSKY GLASS SKYLIGHT
[08 62 00 Unit Skylights]
[08 73 00 Metal Framed Skylights]
NOTE:

THIS IS A PERFORMANCE SPECIFICATION IN CSI FORMAT.
 IN ORDER TO INSURE THE BEST SPECIFICATION FOR YOUR
APPLICATION, WE RECOMMEND THAT YOU CONSULT WITH YOUR
LOCAL CPI REPRESENTATIVE FOR ASSISTANCE

DELETE OPTIONAL/UNNECESSARY ITEMS IN PARENTHESIS.
Note: “
” in left margin denotes option(s).

SPECIFICATION IN DISC FORMAT IS AVAILABLE UPON REQUEST.

[Downloadable Word Doc. file is available on our web site: www.cpidaylighting.com]
CPI DAYLIGHTING CLEARSKY
GLASS SKYLIGHTS
MASTER SPECIFICATION
To be certain that you are using the most recent available CPI
Specification, please visit our website at www.cpidaylighting.com
and download the current version.
CPI DAYLIGHTING, INC. IS ENGAGED IN CONTINUING RESEARCH TO IMPROVE ITS
PRODUCTS. THEREFORE, THE RIGHT IS RESERVED TO MODIFY OR CHANGE MATERIAL
IN THIS SPECIFICATION WITHOUT NOTICE.
[08 62 00] [08 73 00]
Rev 05/2012
CLEARSKY GLASS SKYLIGHT SYSTEM
[08 62 00 Unit Skylights]
[08 73 00 Metal Framed Skylights]
PART 1 GENERAL
1.1
Scope
This section includes those items required for the skylight work shown on the contract
drawings and as specified herein. They are limited to the skylight materials and are as
follows:
Structural calculations (Optional)
Fabricated skylight frames and related fasteners
Fabricated flashings and closures
Applied finish of aluminum extrusions and sheet
Glass and Glazing
Installation
1.2
Related Work
A.
B.
C.
D.
E.
F.
G.
H.
I.
1.3
A.
Section (_____): Concrete and/or Masonry
Section (_____): Structural Steel
Section (_____): Metal Fabrications
Section (_____): Flashing and Sheet Metal
Section (_____): Glazing
Section (_____): Roofing
Section (_____): Sealants
Section (_____): Wood Blocking
Section (_____): Final Cleaning
System Requirements
Design
1. All vertical skylight framing components shall incorporate a system of alternate
serrations for attachment of the exterior glass clamping bars with ¼”- 20
stainless steel screws, and Snap-On clamping bar covers.
2. All horizontal and vertical skylight framing components shall incorporate an
integral condensate control gutter system with weep holes at the sill condition
for positive drainage to the exterior.
3. The skylight system(s) shall incorporate flush silicone sealant joints at the
horizontal framing components.
4. The skylight system(s) shall incorporate silicone sealant remedial seals
adjacent to the vertical framing component clamping bars and Snap-On
covers.
5.
(Optional: The skylight system(s) shall incorporate flush silicone sealant joints
at both the horizontal and vertical framing components, with fully concealed
mechanical fasteners and factory applied structural silicone sealant joints,
creating a totally flush glazed system.)
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B.
1.4
A.
B.
Performance
1. The skylight framing components, including the glass, shall be designed in
accordance with the following requirements:
a. ____ PSF Live or Snow Load acting vertically
b. ____ PSF Wind Load acting horizontally
c. A Dead Load as applicable to the framing and glass
d. The support structure and adjacent construction must support the transfer
of all loads, including horizontal and vertical, exerted by the skylight
system(s).
2. The deflection of the framing member in a direction normal to the plane of the
glass, when subjected to a uniform load deflection test in accordance with
ASTM E330 and per the above specified loads, shall not exceed L/175 or ¾”,
whichever is less, for the unsupported span.
3. The deflection of a framing member in a direction parallel to the plane of the
glass, when carrying its full dead load, shall not exceed an amount which will
reduce the glass bite below 75% of the design dimension, shall have a 1/8”
minimum clearance between itself and the edge of the glass and shall not
impair the function of or damage any joint seals.
4. Air Infiltration: allowable air infiltration shall not exceed 0.06 CFM of the total
glazed surface area when tested in accordance with ASTM E283 at a static
pressure of 6.24 PSF.
5. Water Penetration: no uncontrolled water penetration shall occur when the
system is tested in accordance with ASTM E331 at a static pressure of 12 PSF
and for dynamic water resistance in accordance with AAMA 501 at a static
pressure of 12 PSF.
6. Thermal Movement: The skylight system(s) shall perform without detrimental
effect at a temperature range of 100 +/- degrees from the ambient
temperature.
7. Where permitted by code, a 1/3 increase in allowable stress for wind or
seismic load shall be acceptable, but not in combination with any reduction
applied to combined loads. In no case shall allowable values exceed the yield
stress.
8. Compression flanges of flexural members may be assumed to receive lateral
bracing only from anchors to the building structure and horizontal glazing bars
or interior trim which are in contact with 50% of the members’ total depth.
9. (Optional: (limited reaction design) the skylight framing components are to be
designed to exert no horizontal reactions under vertical gravity type loads
(dead, live or snow). Unbalanced live loads (wind, seismic, etc.) acting upon
the skylight will produce horizontal reactions that cannot be controlled by the
skylight(s) and, therefore, must be resisted by the support structure.)
Quality Assurance
The skylight system(s) shall be furnished by a firm with a minimum of ten (10) years’
experience in the design, engineering, fabrication and installation of aluminum framed
skylights.
The work of this section, specifically the design, engineering, fabrication, finishing,
glass, jobsite preparation, installation and glazing of the skylight system(s) shall be
the responsibility of the skylight manufacturer. The skylight manufacturer shall be
regularly engaged in these phases of skylight construction and be able to
demonstrate successful performance on comparably sized projects and of
comparable design complexity for at least the previous ten (10) years.
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1.5
A.
Manufacturer
The skylight system(s) shown on the contract drawings and as specified herein is/are
based on system(s) as furnished by CPI Daylighting, Inc., telephone (800) 759-6985,
(847) 816-1060, fax (847) 816-0425, Website: www.cpidaylighting.com
and as locally represented by __________________________________________.
Phone ______________________
B.
1.6
A.
B.
C.
D.
Optional Manufacturers must:
1. Qualify to bid not less than ten (10) days prior to bid closing date.
2. Submit complete details for review by the Architect prior to bid.
3. Submit structural calculations based on the design loads of this specification,
showing sizes of framing members and loads applied to the support structure,
for review by the Architect prior to bid.
4. Submit notarized certification that they have performed successfully in the
design, manufacture and installation phases of skylight projects comparable in
nature for at least the previous ten (10) years.
Warranty
Submit manufacturer’s warranty certifying that, except where specifically noted, the
skylight work has been furnished and installed in accordance with the Contract
Documents.
Certify that the skylight framing system(s) is/are free of defects in design, materials
and construction for a period of five (5) years from the Date of Skylight Completion.
The finish shall be warranted as provided by the finish applicator.
The glass shall be warranted against defective materials, delamination, seal failure,
and defects in manufacture as provided by the glass manufacturer’s standard
warranties. Glass breakage is not warranted.
END OF SECTION
PART 2 PRODUCTS
2.1
Materials
A.
Framework: Principal Supporting Members: 1/8” minimum thickness, extruded
aluminum, tubular, 6063-T5, 6063-T6 or 6005-T5 alloy and temper per ASTM B221.
Sizes, shapes and profiles [as per CPI Daylighting, Inc.’s standard components] [as
indicated on the Contract Documents].
1. Snap-On Covers and Miscellaneous Non-Supporting Trim: 1/16” minimum
thickness, extruded aluminum, 6063-T5 alloy and temper per ASTM B221.
2. Principal Formed Metal Members: 1/8” minimum thickness, 5052 alloy per
ASTM B209.
B.
Flashings and Closures
1.
1. 5005-H34 alloy sheet aluminum in a minimum [0.040”] [______]
thickness.
2. Sheet metal flashings and closures shall be shop formed to profile in 10ft.
lengths. When lengths exceed 10ft., field trimming to length and field forming
the ends is necessary to suit field conditions. Sheet metal overlaps are to be
6”, set in sealant and aluminum pop riveted as required.
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C.
Finish (as selected by the Architect)
1. [AA M10 C22 A31 Class II clear anodized] [AA M10 C22 A41 Architectural
Class I clear anodized (AAMA 607.1)] [AA M10 C22 A44 electrolytically
deposited anodized (AAMA 608.1] [Acrylic, Baked Enamel (e.g. ACRABOND)
coating in a standard white, bronze or black color] [Fluoropolymer (e.g.
ACROFLUR resinous coating, 50% Kynar, in a standard/custom color (AAMA
603.8] [Fluoropolymer (e.g. FLUROPON, DURANAR) resinous coating, 70%
Kynar, in a standard/custom color (AAMA 605.2)] [SPECIAL as specified by
the Architect].
D.
Glass (as selected/specified by the Architect)
1.
Non-Insulating Glass (laminated): two (2) lites interleaved with polyvinyl butyral
(PVB) interlayer. Exterior lite: ____” thick, [annealed] [heat-strengthened],
[clear] [bronze] [gray] [blue] [green] [blue-green] [special]; [
0.030”] [0.060”] clear PVB interlayer;
Interior lite: ____” thick, [annealed] [heat-strengthened], clear.
2.
Insulating Glass (with silicone secondary edge seal): Exterior lite: ¼” thick,
[tempered] [heat-strengthened], [clear] [bronze] [gray] [blue] [green] [bluegreen] [special]; ½” air space;
Interior lite: ____” thick, [annealed] [heat-strengthened] clear laminated
[SPECIAL] (as specified by the Architect).
E.
Fasteners
1. Exterior Clamping Bars: ASTM A193 B8 300 series stainless steel.
2. Framework Connections: ASTM A193 B8 300 series stainless steel.
3. Anchoring Skylight(s) To Support Structure: ASTM A307 zinc plated steel.
F.
Setting Blocks
1. Extruded Type II silicone rubber designed to permit adhesion and comply with
the following specifications:
a. Hardness: ASTM D2240 Type A 80 (+/-5) durometer.
b. Color: Black.
G.
Glazing Gaskets
1. Extruded EPDM rubber design to comply with the following specifications:
a. Hardness: ASTM D2240 Type A 60 (+/-5) durometer.
b. Tensile Strength: ASTM D412 1200psi
c. Elongation: 250% minimum.
d. Color: Black.
2. Compression Set: ASTM D395 Method B, 22 hours @ 212 degrees F. 30%,
maximum.
3. Heat Aging Characteristics:
a. 70 hours @ 212 degrees F.
b. ASTM D573 Hardness Change: +10.
c. ASTM D573 Tensile Change: -15%.
d. ASTM D573 Elongation Change: -40%.
4. ASTM D1149 Ozone Resistance: No cracks.
5. No visual checks, cracks or breaks after completion of tests.
6. Sealants Structural Flush Glazed Joints: High performance silicone sealant
applied in accordance with manufacturer’s recommendations.
Non-Structural Flush Glazed Joints and Weather seal Joints: silicone sealants
applied in accordance with manufacturer’s recommendations.
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7.
2.2
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
Structural silicone sealant performance requirements:
a. Hardness: ASTM D2240 Type A, 30 durometer.
b. Ultimate Tensile Strength: ASTM D412, 170 psi.
c. Tensile at 150% Elongation: ASTM D412, 80 psi.
d. Joint Movement Capability After 14 Day Cure: ASTM D1149, +/- 50%.
Fabrication
The principal skylight framing components shall be factory assembled in whole or in
part, identified and shipped knocked down for final assembly at the jobsite.
All required welding of sheet aluminum flashings and closures shall be by the heliarc
process with all welds ground smooth.
Construct the skylight(s) using extruded aluminum members.
Construct the skylight(s) using a continuous extruded aluminum sill adapter with
expansion joints as required.
Locate weep holes in the sill adapter, at each rafter connection, to positively drain
condensation to the exterior of the skylight(s).
Design all glass supporting members for slide-in type spline glazing gaskets.
Design glass clamping bar fasteners to resist uplift loadings. The spacing of the
fasteners shall be determined by the structural calculations, when applicable.
H. Use Snap-on clamping bar covers to conceal the glass clamping bars and the
glass clamping bar fasteners.
Shop locate, drill and bolt the aluminum clips to the framing members.
Set the glass with interior and exterior EPDM glazing gaskets.
Use silicone setting blocks to support the glass and to provide edge clearances and
glass bites in accordance with FGMA recommendations and as outlined below:
1. Set the blocks not less than 6” from the edge of the glass.
2. Glass Bite: Not less that ½” nor more than 5/8” on any side of the glass.
3. Maintain ¼” edge clearance between the glass and the adjacent metal frame.
4. Use EPDM rubber spacers to maintain the separation of the glass and the
metal frame.
END OF SECTION
PART 3. INSTALLATION
3.1 Jobsite Inspection
A. The skylight manufacturer’s installer shall examine the support structure and adjacent
construction to determine that they are properly prepared, dimensionally correct and
ready to receive the skylight work included herein. Any deviations from the approved
skylight shop drawings shall be brought to the immediate attention of the General
Contractor. No installation work shall begin until all such deviations have been
satisfactorily corrected at the expense of the responsible party(s).
3.2
A.
B.
C.
Preparation
All skylight materials shall be inspected and all defective components shall be
repaired or replaced.
All contacts between aluminum and dissimilar materials shall be isolated via plastic
shimwork, provided by the skylight manufacturer, to prevent electrolysis.
The skylight manufacturer and the skylight manufacturer’s installer exclude all field
measuring, demolition, removal, replacement, and/or rework of any existing material.
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3.3
A.
B.
C.
D.
E.
F.
G.
3.4
A.
B.
C.
Installation
All skylight materials shall be installed in accordance with the skylight manufacturer’s
installation instructions packet, by experienced installers, in a clean and workmanlike
manner.
Install the skylight materials under the direction of the skylight manufacturer’s
designated installer.
Erect the skylight materials plumb and true and in proper alignment and relation to the
established lines and grades as shown on the approved shop drawings.
Anchor the skylight materials to the support structure in strict accordance with the
approved shop drawings.
Use high performance silicone sealants per the skylight manufacturer’s instruction.
Apply all sealing materials in strict compliance with the sealant manufacturer’s
recommendations. Before application, remove dirt, dust, moisture and other foreign
matter from contact surfaces. Mask adjoining surfaces to maintain a clean and neat
appearance. Tool the sealant to fill the joint and provide a smooth finish.
Any temporary covering and weatherproofing of the skylight opening(s), if so required
by the General Contractor and removal of same during and after the completion of
the installation is excluded by the skylight manufacturer and the skylight
manufacturer’s installer. Any temporary coverings that may be required are not to
obstruct or interfere with the skylight installation in any way.
Cleaning and Protection
Install the skylight framework and associated metal so as to avoid soiling or smudging
of the finish.
Clean the glass and framework at the time of the installation. Final cleaning, if so
required, subsequent to the completion of the installation, shall be the responsibility of
the General Contractor.
The skylight manufacturer does not provide nor include any temporary protection to
the skylight materials after the completion of the installation. Protection of the skylight
from ongoing work by other trades shall be the responsibility of the General
Contractor. The skylight manufacturer is responsible only for the damage caused by
the personnel under his control and responsibility.
END OF SECTION
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