See information about Sectional Overhead doors below, and about the domestic sectional garage door range on the link further down
The Sectional Garage Door
Kingspan 610mm x 40mm thick composite panels manufactured using 0.5mm thick hot dipped zinc coated (to BS EN 10147) steel internal and external facing sheets, each with a class 1 surface spread of flame when tested to BS 476: Part 7:1971. These sheets are bonded together using IPU foam, which has a density of 40ks/m3. The panel itself gives a “U” value 0.51 W/m2 K, meaning that typical 5,000 x 5,000 wide door has a “U” value of 0.9 W/m2 K and has formed tounge and grooved hinged joint, incorporating a neoprene seal running the full length of the panel to give excellent weather resistance. 80mm panel also available has a typical “U” value of 0.24 W/m2 K, meaning that a typical 5,000 x 5,000 wide door has a “U” value of 0.54 W/m2 K. The acoustic value of the door panel has a single weighted sound reduction of [RW] of 25db. Standard stucco finish is embossed primer coated to both faces.
Sectional doors are counterbalanced to ensure the smooth running of doors. Using minimal effort. All counterbalance spring calculations carried out by Indupart are designed to get the maximum life out of the door springs we manufacture (most typical loading docks are calculated to a minimum of 20,000 cycles). The springs are high tensile helical wound steel. Shot blasted for improved performance. The springs are mounted on a steel shaft supported by bearing brackets incorporating sealed bearing rollers, to ensure free running of the shaft. Also mounted on the spring shaft are the cable drums. These carry the aircraft quality cables, which have 7:1 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. Spring break devices and cable breaks are fitted to doors as standard to comply with CE markings.