joints, gaskets to drain any condensation to the outside, a choice of
tempered clear, laminated, insulated daylight area. The protective
exterior cladding shall be [aluminum] [copper] for protection and low
profile appearance. The skylight shall have a [ventilation flap that opens
to allow air circulation and contains a filter within the flap to keep dust
and insects out] [ventilating panel and insect screen with an operator hook
that allows easy opening and closing, with control rods, for out-of-reach
installations or smooth-turning handle for within-reach installation].
b. Emergency escape and rescue roof window which opens [45] [_____]
degrees to satisfy egress requirements for emergency escape. When the unit
is closed, a ventilation flap can be opened to allow in fresh air. For
easy cleaning from inside the room, the sash rotates completely inward.
Insect screen and sunscreening accessories are available.
c. Balcony roof window featuring dual-sash operation: the top sash
opens for maximum ventilation and also pivots completely inward for easy
cleaning from inside the room; the bottom sash opens outward to create a
roof balcony. When the window is closed, a ventilation flap allows fresh
air circulation. Insect screen and sunscreen accessories are available.
Roof windows shall withstand dead and live loads caused by pressure and
uplift of wind acting normal to the plane of roof and tested by an ICBO
listed, independent testing and quality control inspection agency to an
allowable downward pressure of [0.57-8.71] [_____] MPa [12-182] [_____] psf
and an uplift pressure of [1.05-5.03] [_____] MPa [22-105] [_____] psf
measured in accordnace with ASTM E 330, as recommended by the manufacturer
for the type of window tested.
2.5.2
Plastic Glazed Unit Skylight
2.5.2.1
Dome
Dome skylights shall be factory assembled units each consisting of [a
single dome or sealed double domes with a 1.5 mm 0.06 inch extruded
aluminum frame and 1.5 mm 0.06 inch] [sealed double or triple domes with
1.5 mm 0.06 inch extruded aluminum frame with a polyurethane thermal break
to prevent condensation on the interior portion of the frame and 1.75 mm
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 [clear] [white] [bronze] [_____].
For self-flashing domes, the curbs, treated wood nailer, and insulation
shall be the manufacturer's standard. Uniform design load capacity of
composite dome and frame shall meet or exceed [1.9] [1.4] [_____] MPa [40]
[30] [_____] psf snow load. Insulated curbs with PVC thermal barriers
connecting the top and bottom of the inner and outer walls are available.
2.5.2.2
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 ara available
from 1.2 to 6 m 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 [0.4 to 1.5 kN 90 to
330 lbs (1 panel per side)] [1.8 to 3.2 kN 410 to 730 lbs (2 panels per
side)] [3.8 to 5.8 kN 850 to 1300 lbs (4 panels per side)] depending on
size. Pyramids are available in grid and tandem models.
SECTION 08600
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