The number of knuckles can go down or up depending on the design of the hinge.
How many spring hinges need on a door.
This will reduce the friction and allow the door to close more smoothly.
Most hinges today are sold in pairs.
The most common type of butt hinge is a five knuckle hinge.
The torsion spring distributes the garage door s weight evenly which is critical with a wide and or extremely heavy door.
If you re using hinges that are smaller than 4 inches use one spring hinge on doors weighing.
Use two hinges for doors up to 60 inches tall use three hinges if the door is between 60 and 90 inches tall for doors between 90 inches and 120 inches use four hinges if your door is between 37 inches and 120 inches wide installing an extra hinge will supply added strength to support the additional weight and tension being applied to the frame.
Standard torsion spring install supplement 637kb.
Refer to the specifications that came with your hinges to determine how many spring hinges you need.
A couple things to make a note of before purchasing your door hinges.
Unfortunately if you only had to replace hinges for one door you would need to order two pairs of hinges.
A pair of hinges is two complete sets of hinges as displayed below.
Features standard torsion spring supplemental install instructions.
Most doors have three.
Doors 60 90 need three hinges.
Always apply at least two spring hinges.
Referring to door width.
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