3 hinges are optimal for door weights of 6 12 kg.
Number of door hinges per door.
Doors 60 90 need three hinges.
Every door should be provided with at least one hinge for every 30 inches in height or portion thereof.
For example a 90 door needs three hinges and a 91 door needs four.
Doors up to 60 2 hinges doors over 60 but not over 90 3 hinges doors over 90 but not over 120 4 hinges.
Doors over 90 inches but not over 120 inches 4 hinges are recommended.
As a general rule you will want to use 1 hinge per every 30 inches of door or fraction thereof.
For high and narrow doors for example it may be wise to use three hinges for extra stability even though with a weight of 6 kg this is not strictly.
In our experience the following number of hinges has been proven and tested.
However more hinges may be required per chart below.
Directions after determining the weight and width of the door draw a straight line through the door width and weight to.
It is important to consider the weight of the door including additional weights such as handles.
Doors over 60 inches but not over 90 inches need to use 3 hinges.
For example if you have a 1 3 4 thick door that is 8 0 by 3 2 and made out of oak you would calculate the square inches of the door 96 x 38 3648.
The door height also affects the number of hinges required.
2 hinges are optimal for door weights of 4 6 kg.
Doors up to 60 inches need 2 hinges.
Referring to door height.
Referring to door height.
The result is your door weight in pounds.
Doors up to 60 need two hinges.
Doors 90 120 need four hinges.