Their position should be between 900mm 1050mm 35 5 41 5 inches above the floor.
Standard door handle hole size and position.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
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.
Installers typically drill the hole centered 36 inches above the floor if not specifically instructed to do so differently.
Standard door preparation for door knob or lever handle.
Lock bore the diameter of the hole for the lock body.
If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
Many older doors had bores that were been smaller.
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 bore hole is the large diameter hole where the door knob is mounted.
The standard sized bore hole is 2 1 8 in diameter.
Most interior doors are prepped with a single boor hole.
In most cases the door set which is inside of the door and controls the door latch will.
The requirements of bs 8300 provide for a door knob to be between 800mm 1050mm 31 5 41 5 inches from a finished floor.
This creates a more harmonious appearance.
Most of the current locks require the standard 2 1 8 bore.
The international building code has established doorknob height between 34 and 48 inches above a finished floor.
It is more important that your door handles be consistent than that they match the standard door handle height.