Suitable for general applications up to 20 ft in width or height, manual Model HDM and economy Model HDE feature self-supporting steel mounting angle and knock-away double angle steel bottom bar for 10 lb/ft with rubber loop. Model HDM has manual chain hoist and counterbalance spring assembly cycle rating of 50,000, while Model HDE, offering door speeds up to 18 ips, features frame-mounted thru-beam photoelectric sensor and heavy-duty gear operator with pushbutton controls.
This story is related to the following:Rollup Doors