gathermewool
Site Donor 2023
Data:
1. Need to replace broken garage door spring.
2. 9'X7' foam-insulated steel door weights ~ 115#
3. Previous springs are clearly painted dark blue on one end of the spring (140# rating), but seem to be a lighter blue on the other side (90# rating).
4. Need to determine how to size new spring prior to purchase
5. The door opener is an old 1/4HP unit from the 80's; however, it does not seem to struggle opening the door. The bar does bend a bit as it is nearly shut. The other side does not do this bending thing.
Long-Winded Version:
Heard a loud thunk from the garage two nights ago, which turned out to be a sheered-off hook-end of one of the two springs. Luckily, the safety cable prevented any damage to the car/window that were only a few feet away.
I've been trying to figure out how to choose replacement springs (I will replace both.) One end of the old spring is painted dark blue (140# rated), but the other seems to be painted light blue (90# rated).
I weighed the door in the mostly-closed position by dead-lifting it, stepping on a digital scale (area was level) and marking the measurement. I weighed the door + me and then just me, two times each, and came up with 112# and 117# as the weight of just the door.
My weight was exactly the same for both measurements, but the weighing of the door was not precise, because the more I lifted the door, the more weight seemed to be transferred to the slide rail (with it halfway lifted, the weight was as low as 90#); the indicated weight also varied slightly as I moved, but seemed to settle out enough to mark each measurement.
Thoughts/experience?
1. Need to replace broken garage door spring.
2. 9'X7' foam-insulated steel door weights ~ 115#
3. Previous springs are clearly painted dark blue on one end of the spring (140# rating), but seem to be a lighter blue on the other side (90# rating).
4. Need to determine how to size new spring prior to purchase
5. The door opener is an old 1/4HP unit from the 80's; however, it does not seem to struggle opening the door. The bar does bend a bit as it is nearly shut. The other side does not do this bending thing.
Long-Winded Version:
Heard a loud thunk from the garage two nights ago, which turned out to be a sheered-off hook-end of one of the two springs. Luckily, the safety cable prevented any damage to the car/window that were only a few feet away.
I've been trying to figure out how to choose replacement springs (I will replace both.) One end of the old spring is painted dark blue (140# rated), but the other seems to be painted light blue (90# rated).
I weighed the door in the mostly-closed position by dead-lifting it, stepping on a digital scale (area was level) and marking the measurement. I weighed the door + me and then just me, two times each, and came up with 112# and 117# as the weight of just the door.
My weight was exactly the same for both measurements, but the weighing of the door was not precise, because the more I lifted the door, the more weight seemed to be transferred to the slide rail (with it halfway lifted, the weight was as low as 90#); the indicated weight also varied slightly as I moved, but seemed to settle out enough to mark each measurement.
Thoughts/experience?
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