As a general rule you will want to use 1 hinge per every 30 inches of door or fraction thereof.
How many hinges on a door.
This thread includes a handy chart for deciding when a door large or heavy enough to require a third or fourth hinge.
Opening heights 7 6 1 16 through 10 0 two pair butt hinges from under head cl 9 3 4 top of door 9 5 8 from bottom of frame cl 10 3 8 bottom of door 9 5 8 due to the the fractional calculations the bottom hinge cl may vary plus or minus 1 64 center two hinges are equally spaced between top and bottom.
The third hinge is centered between the top and bottom hinges.
Doors up to 60 inches need 2 hinges.
For doors over to 2 1 4 thick the hinge is set back 3 8 from the back face of the door.
Use the chart.
Door width and thickness the size thickness and weight of the door will determine the size of hinge that should be used.
I require door hinges for hospital doors material s s 316 frame door weight 70 kg door dimensions 2100mm x 1800 mm x 50 mm.
First the taller the door the more hinges it will require.
If the hinges are rated for 25 lbs.
Doors over 60 inches but not over 90 inches need to use 3 hinges.
Either way strong hinges are crucial.
The number of hinges per cabinet door depends on a few factors.
Because gravity works on a door in this way hinges are placed on the high side with the bottom hinge 10 inches from the bottom of the door and the top one 5 inches from the top of the door.
Equally hinges are also available in many different designs.
Referring to door height.
Door thickness backset x 2 clearance required hinge width.
You will find that hinges come in many shapes and sizes and some may even feature ornate patterns carved into the hinge s leaves and knuckles.
Once these dimensions are known the formula can then be applied.
Each and the door weighs 80 lbs you ll want to use four hinges.
Many hinges per door.
If the door only weighs 70 lbs you can get away with three hinges.