2.9.1.2
Ventilators
Support on two hinges and two arms, or on two steel slide arms pivoted to
vent and to principal frame member. Pivots shall be bronze-brushed and
hinges shall have bronze pins. Design ventilators to close and weather on
each other, or on independent meeting rails assembled as part of window
frame. Provide for positive adjustment of individual vents to ensure
positive contact between sash and frame when closed.
2.9.2
Casement Windows
[Standard Intermediate] [Heavy Intermediate] [Heavy Custom]. Provide
continuous drip molds immediately above ventilators. Where fixed sections
adjoin ventilators, provide drips continuous across top of fixed sections.
Provide each side hinged ventilator with one pair of non-friction extension
hinges, one sash operator, and one locking handle. Provide sash over 1680
mm 66 inches high with three hinges. Hinges shall have strength necessary
to permanently support glazed ventilator without twist or sag.
2.9.2.1
Sash Operators
Use [sliding underscreen] [crank-operated rotary] sash operators. Design
operators to hold ventilators firmly in position at any angle up to 90
degrees. [Use friction or thumb-screw sliding operators.] Use heavy-duty
worm-gear rotary operators, with machine-cut, case hardened steel gears.
Provide pivoted lever type locking handles, engaging beveled strike plate
or keeper. For ventilators exceeding 1680 mm 66 inches in height, provide
two-point locking device, operated by rods from single lever handle.
Conceal rods where design of sash section will permit.
2.9.2.2
Hopper or Sill Type Ventilators
For hopper or sill type ventilators occurring under casement or fixed sash,
provide cam-acting locking handle. For hinged type, provide one pair of
hinges and two concealed friction stay arms; for projected type, use two
friction shoes with nonfriction stay arms to hold ventilator in any
position, up to 45 degrees. For hopper vents over 1220 mm 48 inches wide,
use two locking handles.
2.9.2.3
Transom Ventilators
When transom ventilators occur above casement or fixed sash, hang on two
stay arms sliding in friction shoes. Provide ventilators with hardware
designed for pole operation.
2.9.3
Continuous Windows
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NOTE: Select desired operation and describe in
detail under paragraph "Special Operators." Specify
motorized operators under Division 16 and include
uniform wind load (in areas subject to high wind
velocity) against which motorized equipment must
operate ventilators noiselessly without chattering.
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Continuous type with [manual] [motorized] mechanical operation.
SECTION 08510
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