Doors up to 60 inches need 2 hinges.
Hinge spacing on interior doors.
Make another mark on the door through the center screw hole of the hinge and trace the outline of.
Referring to door height.
Measure 10 inches from the bottom of the door and make a mark with the pencil.
Opening heights 3 0 through 4 11 15 16 one 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 2.
Bigger solid core doors require 3 or 4 or more hinges with ball bearings.
On 3 1 2 hinge preparation for 1 3 8 doors the standard for 6 8 non fire rated frames is two 2 hinges.
Bottom hinge 10 254mm from bottom edge of barrel to finished floor.
Doors over 90 inches but not over 120 inches 4 hinges are recommended.
Light hollow core doors that are 6 8 only require 2 hinges with a cheap pin.
Third hinge centered between top and bottom hinges.
As a general rule you will want to use 1 hinge per every 30 inches of door or fraction thereof.
How to determine hinge spacing on a door.
The top hinge is a little closer to the top usually about 7 as it is always in tension with the forces applied.
All 4 1 2 and 5 butt hinge spacing.
Doors over 60 inches but not over 90 inches need to use 3 hinges.
Opening heights 5 0 through 7 6 one and one half pair butt hinges from under head cl 9 3 4 top of door 9 5 8.
Lay the hinge on the edge of the door with the bottom of the hinge on your mark.