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SECTION 08600
METAL-FRAMED SKYLIGHTS
1.1
SYSTEM DESCRIPTION
A.
DESIGN REQUIREMENTS
| 1. |
Extended
Aluminum members with attachment of exterior glass
retainers with 1/4-in. x 20 stainless steel screws
and snap-on beauty caps.
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| 2. |
Condensation
guttering system integral with skylight framing members
for positive drainage of condensation.
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| 3. |
Flush
glazed exterior horizontal joints with field applied
structural silicone. |
B.
PERFORMANCE REQUIREMENTS
| 1. |
Structural
Members: Of sufficient sizes to support design loads
as prescribed by governing building codes.
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| 2. |
The
deflection of the framing member in a direction normal
to the plane of 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, up
to 1-in. maximum, for clear spans under 20-ft., or L/240
for clear spans greater than 20-ft.
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| 3. |
The
deflection of the framing member in a direction parallel
to the plane of glass , when carrying its full dead
load, shall not exceed an amount which will reduce the
glass or panel bite below 75% of the design dimension
and the member shall have a 1/8-in. min. clearance between
itself and the edge of the fixed panel, glass, or component
immediately adjacent, nor shall it impair the function
of or damage any joint seals.
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| 4. |
Water
Penetration: No water penetration shall occur when the
system is tested in accordance with ASTM E331 using
a differential static pressure of (20% of the inward
acting design wind load pressure, but not less than
(12psf). Water penetration is defined as the appearance
of uncontrolled water other than condensation on the
interior surface of any part of the skylight.
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| a. |
Drain
water penetrating at joints, as well as condensation
occurring within the system, to exterior face
of the work. |
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| 5. |
Thermal
Movement: Provide for such expansion and contraction
of component materials as will be caused by regional
surface temperatures without causing buckling, stress
on glass, failure of seals, undue stress on structural
elements, reductions of performance or other detrimental
effects.
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| 6. |
Where
permitted by code, a 1/3 increase in allowable stress
for wind 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.
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| 7. |
Compression
flanges of flexural members may be assumed to receive
effective lateral bracing only from anchors to the building
structure and horizontal glazing bars or interior trim
which are in contact with 50% of the member's total
depth.
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| 8. |
The
skylight framing is designed to be self-supporting between
the support construction. The skylights will impose
reactions to the support construction. All adjacent
and support construction must support the transfer of
all loads, including horizontal and vertical, exerted
by the skylights. Design or structural engineering services
for the supporting structure or building components
not included in the skylight's scope are not included
under this section.
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| 9. |
Optional
limited reaction design: The skylight framing is to
be designed to exert no horizontal reactions under vertical
gravity type loads, (dead, snow, live). Unbalanced live
loads, (wind, seismic, ect.) acting upon the skylight
will produce horizontal reactions that cannot be controlled
by the skylights but must be resisted by the support
structure. |
1.2
QUALITY ASSURANCE
| A. |
Work
of this section, including design, engineering, fabrication,
finishing, preparation at the job site, erection and
glazing of the skylight manufacturer. The manufacturer
shall be regularly engaged in the preceding phases
of construction of skylights and able to demonstrate
that he has performed successfully on comparably sized
projects and of comparable design complexity over
at least the previous ten years.
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| B. |
Royalite
Mfg. Inc.has over twelve years of experience in the
design, engineering, manufacturing and installation
of skylights. Our skylight systems have been subjected
to rigorous testing during the course of development
and have been applied in thousands of practical applications.
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1.3
WARRANTY
| A. |
Submit
manufacturer's warranty certifying that skylight work
was furnished and installed in accordance with the
Contract Documents.
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| B. |
Certify
that skylight frame is free of defects in design, material,
and construction for a period of (5) years from the
Date of Skylight Completion.
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| C. |
Warrant
glass against defective materials, delamination, seal
failure, and defects in manufacture per the glass manufacturer's
standard warranties. Glass breakage is not warranted.
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| D. |
Warrant
structural sealant for a period of 5 years per sealant
manufacturer's standard warranty of merchantable quality.
Warranty shall certify that cured sealant:
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| 1. |
Will
not become brittle or crack due to weathering
or normal expansion and contradiction of adjacent
surfaces. |
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| 2. |
Will
not harden beyond a Shore A durometer of 50, nor
soften below min. of 10 points. |
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| 3. |
Will
not change color significantly when used with
compatible back-up materials. |
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| 4. |
Will
not bleed significantly. |
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| E. |
Warranty
service becomes effective only following payment in
full for the contract amount.
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