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.
Hinge heights on internal doors.
An 80 inch door is called a 6 8 door pronounced six eight.
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.
Referring to door height.
Standard interior door height is 80 inches.
Doors over 60 inches but not over 90 inches need to use 3 hinges.
As a general rule you will want to use 1 hinge per every 30 inches of door or fraction thereof.
For a slab door measure the width height and thickness of the door.
Standard widths for interior doors are 24 28 30 32 and 36 inches while the height must be a minimum of 80 inches.
For a pre hung door measure the width and height of the slab the rough opening space between the studs with no door installed and the thickness of the jamb.
Doors over 90 inches but not over 120 inches 4 hinges are recommended.
This is the most common height for passage doors that lead from one room to another.
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.
Doors up to 60 inches need 2 hinges.