It is recommended to install a chain hoist when using jackshaft operators installed next to a commercial or industrial garage door.
These door openers (ex.: MH) are equipped with an opener disconnect system in case of a power outage. In this case, you can open or close the door using the chain hoist mechanism.
![Chain for Jackshaft Operators](https://www.garaga.com/sites/default/files/00_Garaga/KnowledgeCenter/Lexique/chain_jackshaft.jpg)
Operators