Hinge Spacing On Interior Doors

On 3 1 2 hinge preparation for 1 3 8 doors the standard for 6 8 non fire rated frames is two 2 hinges.
Hinge spacing on interior doors. Third hinge centered between top and bottom hinges. Bigger solid core doors require 3 or 4 or more hinges with ball bearings. How to determine hinge spacing on a door. As a general rule you will want to use 1 hinge per every 30 inches of door or fraction thereof.
Referring to door height. The top hinge is a little closer to the top usually about 7 as it is always in tension with the forces applied. Doors up to 60 inches need 2 hinges. However manufacturers do periodically revise their hinge and strike spacing therefore the sdi strongly recommends that individual manufacturers be contacted to verify dimensions.
Light hollow core doors that are 6 8 only require 2 hinges with a cheap pin. Lay the hinge on the edge of the door with the bottom of the hinge on your mark. Hinges are generally spaced out equally to also keep the door straight. Doors over 90 inches but not over 120 inches 4 hinges are recommended.
Make another mark on the door through the center screw hole of the hinge and trace the outline of. Bottom hinge 10 254mm from bottom edge of barrel to finished floor. Location of hinges on doors us standards procedure top hinge 5 127mm from frame rabbet to top of barrel. All 4 1 2 and 5 butt hinge spacing.
Doors over 60 inches but not over 90 inches need to use 3 hinges.