General Doors Corporation - Quality Garage Door Solutions


	Quality Door Solutions Since 1947

Products > Commercial > Hardware & Installation > Written Specifications

		TRACK:
		Heavy gauge galvanized steel track shall be 2” or 3” (as required).
		Track shall be bracket of continuous angle mounted for wood jambs, of reverse angle mounted for steel jambs (requires door to lap opening by one inch).
		Vertical track shall be tapered for weather tight closure.
		Horizontal track shall be reinforced with galvanized angle engineered for door size.
		All reinforcing angle and mounting brackets to be welded to track.
		HARDWARE:
		All hinges and roller brackets to be heavy galvanized steel.
		All rollers to have ball bearings with hardened races.
		Galvanized aircraft type lift cable to have minimum 7:1 safety factor.
		Counter balance assembly shall consist of torsion springs mounted on a continuous shaft, or extension springs.
		Oil tempered steel spring wire for all springs.