2022/12/30

What is the overhead door closer "back check" function for?

“Back Check”purpose is to stop the door from slamming open

Case 1:
On an external door in a windy location back-check prevents the wind from “picking up” and opening the door
(which might damage the frame at the hinges)



Case 2:
When there is a wall at 90° from the door back-check stops damage to the wall & door handles by preventing slamming open.


example:


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