Garage door companies are notoriously closed-mouth about their business. They want to sell their product and service, not give advise.
Go online, you will find several websites that sell door hardware at reasonable prices, and are willing to answer questions. Most sites have formulas for determining which springs are needed.
Determining the correct springs is critical. You will need to know the weight or the door (bathroom scale under the door), and the height of the door.
Enter this information and any other they ask for in the formula and it will give a spring recommendation, as in wire size, spring diameter, and length or number of coils.
They can also supply compatible hardware.
One thing to keep in mind, the lift springs will only work as well as the rest of the door. Everything must be level! If the tracks are not level, even if the building is not, the door will not consistently operate properly. Keep everything a square and level as possible. It will pay off in the end!
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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