| STANDARD SPECIFICATION Door
leaves
The door leaves are manufactured from 1.5mm thick zintec
steel sheets with reinforcing channels fixed internally and
rockwool insulation. Overall panel thickness is 43mm. Tracks
The doors are suspended from galvanised
steel box-type top tracks by ball bearing pulleys and the
track fixed to the
structure by means of fabricated steel track brackets. The
design includes a floor bobbin and therefore no bottom track
is needed. Frame
A peripheral interlocking steel
frame is supplied to maintain a fire seal. OPERATION Manual operation
Most doors are normally parked in the fully open position
closing only in the event of fire. In these circumstances,
the doors would be supplied manually operated with self-closing
activated by either a fusible link or the interruption of
a permanent fire signal to a 24 volt DC magnet. In the latter
case, we recommend a speed governor to control the closure. Electrical Operation
Suitable for larger openings or when frequent usage is envisaged.
Operation is via a 240-volt single-phase geared motor with
an inherent 24-volt DC magnet which holds the door open.
An open / close / stop push station allows everyday electrical
operation but in the event of a fire, interruption of the
fire signal to the magnet releases the door which closes
manually with a controlled speed.
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