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Applications Insulated sectional overhead doors are manufactured to suit individual openings for all types of commercial and industrial buildings where the need for energy conservation is desired. Glazed Panels are available, with either a single or double glazed unit. Specification Doors are assembled from 610mm x 40mm thick panels,in either steel or Aluminium, horizontally ribbed, with a foamed core of rigid polyurethane. Each panel has rebated meeting edges with built in seals. Finish Powder Coating to a standard BS/RAL colour is available. Operation Hand Chain - for doors up to a maximum of 5000mm wide x 5000mm high (larger sizes available but not recommended if easy operation is required) Electric - 3 phase, Neutral and Earth power and low level push button operation. A Single phase operation is available for less frequently used doors, and for where 3ph isnt available. Locking Hand Chain - by internal shootbolt and/or chain lock Electric - usually omitted on electric doors although shootbolts can be fitted with electrical interlock switches to isolate the power to the motor should the door remain locked.