| STANDARD SPECIFICATION Curtain
The
shutter curtain is constructed from curved section interlocking
galvanised laths. The leading edge of the single shutter
is led into a bell mouth receiving channel at the closing
jamb whilst the leading edges of a pair of shutters are
provided in male and female sections to effect an overlapping
seal.
Suspension
The shutter laths are suspended
from a narrow 200mm deep fabricated top track by means of
ball bearing pulleys. The
top and bottom of the curtain is attached to a heavy duty
drive chain which provides the flexibility to follow contoured
tracking arrangements. The top track can be fixed directly
to the ceiling slab or a structural downstand or can be supported
from hanger brackets permitting the passage of building services
through a void which requires fire stopping generally by
site contractors. Shutter Box
The shutter curtain is mounted
onto a patented constant-tension barrel assembled in a self-contained
vertical fire resistant
housing. A removable panel to one side of the housing permits
access for maintenance. Drive Systems
The Contour shutter is
provided with a 415 volt 3 phase 50 Hz motor gearbox with
electro magnetic brake suitable
for operation by direct on-mains or by instantaneous automatic
changeover standby generator (by others) in case of power
failure. Emergency operation is achieved by high level crank
handle operation of the motor shaft for which access is to
be detailed by the architect. Auxiliary Drive Unit
For shutters with
complicated or long track configurations, a patented Auxiliary
Drive Unit (ADU) is fitted at a significant
position on the top track. Controls
Each
shutter is provided with a standard control panel for open/stop/close
operation
together with a set of open contacts
for receipt of fire detection signal from local heat detectors
designed to operate at 68°C.
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