| STANDARD SPECIFICATION Curtain
Shutter
curtains are constructed from continuously interlocked
galvanised steel laths, securely held in place by end
locks.
Various thicknesses and profiles are available according
to individual criteria such as size, wind-loading etc.
Bottom rails are generally galvanised and roll-formed
into a tee
section.
Guides
Vertical guides are formed from
rolled steel or fabricated dependent on size and wind loading
and are supplied with
suitable angles for fixing to the structure. Endplates
Prime painted mild steel of
appropriate thickness relative to door size and supplied
with angles for fixing to the structure. Barrel
The barrel is constructed from
seamless steel tube of adequate diameter to resist deflection
and held in bearings or cups
attached to the endplates. Finish
Generally galvanised with non-galvanised parts prime painted.
OPERATION
Self Coiling
Suitable for smaller openings where frequency of operation
is limited and balanced by an internal spring in the barrel.
Openings exceeding 2500mm x 2500mm should be chain or electrically
operated. Chain Operation
Suitable for larger openings
with infrequent usage and available up to 5000mm x 5000mm.
Balance is achieved by an internal
spring in the barrel and operation by endless chain with
a chain locking box to suit client's padlock. Electrical Operation
Suitable for larger
openings or when frequent usage is envisaged. Various types
of arrangement are available with smaller openings
typically using a 240 volt single phase tubular motor and
larger shutters operated by a 415 volt 3 phase geared motor
mounted on one endplate. Adjustable limit switches are incorporated
to stop the shutter at the end of each travel.
Standard controls are open/close/stop
buttons for geared motors and keyswitches on single-phase
tubular motors.
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