Standard Interior Door Backset

Prime line e 2497 mortise keyed lock set with glass knob perfect for replacing antique lock sets and more fits doors with 2 3 8 backset 4 1 out of 5 stars 788 24 20 24.

Standard interior door backset.

Sometimes it s easier to measure from the edge of the door to the highest point on the bore hole. Most modern doors have a 2 frac38 backset although exterior doors and some larger interior doors may have a 2 backset. Some door manufacturers carry stock doors in 7 foot and 8 foot heights and door widths from 24 inches to 42 inches. To determine the correct backset measurement for your door you need to measure the distance from the edge of the door to the center of your cross bore.

Through the edge of the door there is a 1 cross bore that extends from the edge of the door through the bore hole. Patio doors are constructed of glass with a frame. Most interior doors are prepped with a single boor hole. However patio doors are routinely available in 6 foot 11 inch and 8 foot heights.

If your doors are not pre drilled measure the stile width. The standard size is 6 feet 8 inches tall and 6 feet wide. The two standard backset measurements in north america are 2 3 8 inches and 2 3 4 inches. The method or measuring hinge backset varies between sdi and naamm hmma.

The bore hole is the large diameter hole where the door knob is mounted. When ordering a standard door set be sure to measure and specify the correct backset distance from the edge of the door to the center of the 2 frac18 bore. A backset is the distance from the center of the cross bore to the edge of the door. This cross bore is where the latch is installed.

Hinge backset is the dimension from the leading edge of the hinge to either the stop on the frame or to the stop face push side of the door. All standard bored locks ansi 115 2 161 61l type for mortise lock ansi 115 1 86 type all locations must be altered 3 8 lower and standard strike asa type. The most common backset is 2 3 8 but 2 3 4 is also quite common usually used on exterior doors. Opening heights 3 0 through 4 11 15 16 centered in door height not frame.

The standard sized bore hole is 2 1 8 in diameter.