Each door
is counterbalanced by means of helical springs at high level and can be manually or
electrically operated. The door is ideally
suited for installation direct on to structural steelwork, but can be fitted to
masonry provided a suitable timber sub-frame is provided (see Opening
Requirements overleaf).
PANELS
Door face is formed from
horizontally mounted, plastisol coated, galvanised sheet steel panels, filled
with CFC FREE insulation, with a thermal break between panels. More information…
END CASSETTES & ROLLERS
Each end of a panel is
fitted with punched, galvanised steel, end caps to accept side roller carriers
and rollers. As standard the rollers
consist of a nylon running wheel with bearing on a steel shaft. Roller carriers are galvanised steel and
allow the roller to float as the door is operated.
HINGES
Each end of a door panel is
attached to the adjacent panels by means of a combination hinge/roller
carrier. Intermediate hinges are fitted
along the length of the join at maximum 1000mm centres.
TRACKS
Side tracks are manufactured
from cold rolled, 2mm thick, galvanised steel formed in a 'J' profile to retain
the rollers. Bends are preformed in
pairs to ensure smooth operation. The
tracks are welded to galvanised steel, formed vertical angles for securing to
the opening structure and are suspended from the roof structure by suitable
fixing hangers. Spring buffers are
fitted to the back end of the tracks to ensure suspension cables remain under
tension when the door is fully open.
WEATHER SEALS
Flexible rubber seals are fitted
to all four sides of the door. The top
seal compresses against the lintel. The
side seals are fitted to the jamb and compress against the door panels. The bottom seal compresses against the
opening threshold. We recommend that
the threshold be formed with an incline away from the opening to allow run-off
and prevent pooling.
SPRING ASSEMBLY
Counter
balancing of the door is achieved by means of helical torsion springs, mounted
on a steel shaft with bearings supported in suitable galvanised steel plates
secured to the opening structure.
Please see Opening Requirements overleaf for details of steel work
recommended. The number of springs and
bearing plates varies according to the size of door and track arrangement.
Suspension cables run from grooved aluminium cable drums fitted to each end of
the shaft
CABLE BREAK SAFETY DEVICE
As standard a cable break
safety device is used in place of the normal bottom corner brackets. In the unlikely event that a cable should
break or lose tension, a brake engages onto the track preventing the door from
falling out of control.
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EMMERSON INDUSTRIAL DOORS LTD
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Enterprise Way, Sherburn in
Elmet, Leeds. LS25 6NA Tel: 01977
685566 Fax: 01977 681981 |
