insulated Sectional doors

Insulated sectional doors provide high thermal performance – U value to 0.7 (low heat loss). With superior resistance to all weather conditions, a high level of security and excellent insulation, sectional doors provide excellent versatility. Made from either galvanised steel or aluminium panels, they are able to withstand the toughest of conditions and take into account the increasing importance of insulation related building regulations.

The roller carriers are adjustable and, along with the intermediate panel hinges, are hot dipped galvanised steel. The rollers which run in the side track are sealed for life self lubricating bearings c/w a nylon tyre, to give smooth and quiet operation, and mounted on a zinc plated steel shaft. The new design Indupart vertical lift loading dock door needs no adjustment as it is sealed directly to the seal connected to the side fixing angle.

Plastisol XL200 or polyester coating to the external face in a extensive range of colours, internal RAL 9010. Factory paint finish to either internal or external face to any BS or RAL colour. Aluminium panels Unit identification numerals and corporate decals (factory or site applied).

Sectional doors are counterbalanced to ensure the smooth running of doors, using minimal effort. All counterbalance spring calculations supplied by C&N are done to get the maximum life out of the door springs we manufacture (most typical loading dock doors are calculated to a minimum 50,000 cycles).

The springs are high tensile helical wound steel, these are heat treated for improved performance. The springs are mounted on a steel shaft supported by bearing brackets incorporating sealed bearing rollers, this ensures free running of the shaft. Also mounted on the spring shaft are the cable drums, these carry the aircraft quality cables which have a 6:1 safety factor. These are looped and swaged using a hydraulic press to ensure the cables do not get detached from the cable drums or the brackets which connect the cables to the bottom of the door panels.