and method of operation. Provide [full-length top-hung] [double vertical
sliding] [half-length sliding] [half-length fixed] type screens. Design
screens to fit closely around entire perimeter of ventilator or opening, to
be rewirable, easily removable from inside building, and interchangeable
for same size ventilators of similar type windows, with minimum of exposed
fasteners and latches. Provide all guides, stops, clips, bolts, and
screws, as necessary, for a secure and insect-tight attachment to window.
Where wickets are necessary, use sliding or hinged type, with friction
catches, framed and trimmed for durability and tight fit. Provide wicket
opening frames of similar material and cross-section as screen frames.
Provide continuous framing bar between the two sides of screen frames.
2.10.1
Construction
Provide screen frames of steel with finish matching that of windows. Equip
frames with removable splines of steel or vinyl. Form groove in frame for
holding screen cloth in place with noncylindrical splines. Make spline and
groove assembly so that cloth cannot be removed from groove by pressure on
cloth. Make splines of such size and shape that rotation of spline in
groove will be prevented and spline will tightly hold cloth in place.
2.10.2
Insect Screening
ASTM D 3656, Class 2, 18 by 14 mesh, color [charcoal] [grey] [_____].
Install with weave parallel to frames. Stretch tight for smooth
appearance. Conceal edges in spline channels.
2.11
SPECIAL OPERATORS
2.11.1
Pole Operators
Provide for windows having operating hardware or locking rails more than 2
meters 6 feet above floor. Poles shall be of design standard with window
manufacturer, of length to provide operation from 1.67 meters 5 feet above
floor, and with push-pull hooks of proper shape and length. Provide one
pole operator for each room, and one pole hanger for each pole in location
as directed.
2.11.2
Extension Crank Operators
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NOTE: Delete when not applicable.
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Provide removable handles for crank operated rotary operators located more
than 2 meters 6 feet above floor. Provide one removable handle for each
room.
2.11.3
Mechanical Operators
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NOTE: Delete when not applicable.
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Provide [manual] [motorized] operators for group operation of continuous
rows of windows, and for windows located at unusual heights, where other
types of remote operation are not feasible. Operators shall be capable of
opening and closing windows without appreciable deflection, vibration or
rattle. Provide transmission lines equipped with means of adjustment.
SECTION 08510
Page 15
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