Heavy-duty large scale doors capable of withstanding high winds.
The top track supports the weight of the door and is formed from heavy gauge cold rolled steel strip. It is fixed to the lintel with fabricated mild steel brackets where required and is galvanised or painted depending on the door specification and size.
Pickets are from galvanised cold rolled steel strips and form the main framework for the door on the inside the building. The top of each picket is supported from the top track with a hardened steel grease sealed multi ball roller. The bottom of each picket runs within the bottom track and gives the door its immense strength in high winds.
The leaves which are 230mm (9") wide, are formed from cold rolled galvanised steel strip and are ribbed for aesthetic purposes and extra strength. The gauge varies to suit the size of the door.
The hinge strip is capped cold rolled galvanised steel out channel which allows the leaves to hinge vertically and move with the picket section when the door is operated.
The lattice is a unique shape for extra strength and is formed from heavy gauge cold rolled galvanised steel strip. The lattice is bolted onto the pickets and controls the sideways movement of the door and prevents the door flattening out in high winds.
The standard bottom track, which is set into the floor, is manufactured from heavy gauge cold rolled steel strip and runs the full length of the door.
The leading edge is for accommodating hasp and staples, locks, handles etc. and stiffens up the front of each door. It is formed into a deep channel from heavy gauge galvanised steel strip.
Heavy gauge galvanised steel strip is press braked to the required size and shape and fixed to the doors and door jambs to give maximum security.
Each door has a bow handle inside and out and is fitted with a heavy duty hasp and staple which is normally fixed inside unless otherwise specified. The hasp and staple is to take the customer's own padlock.
This operation is by a 415v 3ph geared electric motor with a manual disconnection for hand use during emergencies. Each motor unit is complete with torque limiter which stops the door at each end of travel and also in an emergency. The starter contains OPEN STOP CLOSE buttons plus a safety thermal cut out switch.
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