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Why is this design requiring a torsion spring so popular? Space savings due to the sectioned door? The house I lived in as a kid had a solid metal door hinged
by ricardobeat 5y ago
Why is this design requiring a torsion spring so popular? Space savings due to the sectioned door?
The house I lived in as a kid had a solid metal door hinged about 3/4 of the way up, that you could lift by hand with relatively low effort, and at the top position it would balance on its own weight. The electric part was just a roller chain attached to a short lever, which also happened to give some resistance to the closing movement.
- shaftway 5y agoI think it's because of the space saving. We park our cars in front of the garage, and wouldn't have enough space on our driveway to allow for the door to swing out and not hit a car parked there. Also most garage doors aren't see-through, so you may not know if a car is parked there at all, leading to a high number of fender dings.