... motor,operated with Manual and motornized,widely use in workshop,warehouse etc. Dacheng brand industrial doorWe can ... single track for headroom above 35mm. 4.Hinge:side hing,central hinge 1#,2#,3#,4# 5.OD: ... size 4000*4500,insert one square steel bar in each panel to strength the door body,panel ... Panel size 6000*4500,insert two square steel bars in each panel.two steel bar in each body,panel thickness ...