Manual Overhead Sectional Door

Manual Overhead Sectional Doors can be used in all kinds of factory, warehouse and loading docks. The door panel is double skin thermal insulated. With a manual hoist chain beside it, it can be easily lifted up by hand. At the top, it has a balance spring system to balance the weight of door panel. This is the reason why a manual overhead sectional door even in big size can be moved up by hand with only little force.  Because there is no any electric parts like motor or control system seen in automatic sectional doors, a manual Insulated Overhead Door no need a lot maintenance and repairing. This reduce long term cost for you.                Manual hoist chain and Manual handle  Every door has two manual opening device for: 1. Manual hoist chain: from top drive axis to 1.5m above floor, people can e…