Standard door preparation for door knob or lever handle.
Standard door handle hole size and position.
Their position should be between 900mm 1050mm 35 5 41 5 inches above the floor.
Most of the current locks require the standard 2 1 8 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.
The international building code has established doorknob height between 34 and 48 inches above a finished floor.
In most cases the door set which is inside of the door and controls the door latch will.
The standard sized bore hole is 2 1 8 in diameter.
Generally the knobs should be of a free moving slide action.
Installers typically drill the hole centered 36 inches above the floor if not specifically instructed to do so differently.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Many older doors had bores that were been smaller.
If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
The standard bore is 2 1 8.
This creates a more harmonious appearance.
Measure your existing door knobs from the floor up.
The bore hole is the large diameter hole where the door knob is mounted.
Most interior doors are prepped with a single boor hole.
If they are more than inch off the standard height you will want to match all of the pre existing door handle heights in your home.