Chain Hoist Operation
Safe operation of chain hoist mechanisms on commercial overhead doors
Warnings
Never pull the chain hoist while standing directly under the door. Stand to the side.
Ensure the area under the door is completely clear of people, equipment, and debris before operating.
If the chain feels excessively hard to pull or the door makes unusual noises, stop immediately and investigate. A binding door can suddenly release and drop.
Chain hoists are for manual operation of the door — not for lifting loads or as a restraint device.
Required PPE
- Safety glasses
- Leather gloves
- Steel-toed boots
- Hard hat
Tools Required
- None required (operational procedure)
Procedure — 4 Steps
Clear the door area
Ensure the area directly under and around the door is clear of all personnel, vehicles, and equipment. Verify nothing is on the floor in the door path that could obstruct closure.
Identify the correct chain
Commercial doors typically have two chains hanging from the barrel assembly. The chain closest to the wall (or marked) is the 'raise' chain, and the opposite is the 'lower' chain. Some doors have a single continuous loop. Refer to any posted operating instructions at the door.
Operate the door
Pull the appropriate chain with slow, steady pulls. Do not jerk the chain. The door should move smoothly. To raise: pull the raise chain until the door reaches the desired height. To lower: pull the lower chain slowly and control the descent speed with steady hand-over-hand pulls.
⚠ Never let go of the chain while the door is in motion. Control the door at all times.
Secure the door in position
Once the door is at the desired position (fully open or closed), verify it is holding. If the door has a chain keeper or lock, engage it. For fire-rated doors with fusible links, verify the door is latched in the open position.
Training Videos
Disclaimer: These videos are produced by third-party YouTube channels and are not affiliated with Doorbot. Video content may not align exactly with the procedures above, may depict techniques that differ from DASMA or manufacturer recommendations, and may show tasks that are dangerous if performed without proper training and equipment. Always follow the written procedure, your company's safety policies, and applicable industry standards. Use these videos as supplementary reference only.
References & Standards
- DASMA — Safety Guidelines for Commercial Doors
- OSHA — Materials Handling and Storage (29 CFR 1910.176)