Garage Door Torsion Spring Chart. Ad browse our range of torsion springs in stock. Garage door torsion spring weight lift chart page 1 line 17qq.
Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch. The rough opening should be the same size as the door. These cables attach to the bottom roller brackets of a garage door.
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(2) multiply the spring ippt by the number of turns, and then divide by the hi moment arm. 15 rows garage door torsion spring color code chart. As you shall see, there are over 30 different variations and each one is obviously specific. A properly engineered torsion spring, combined with the proper cable drums, cones, shaft and hardware, produces enough torque to lift heavy garage doors with minimal effort.
