The deadbolt strike centerline should be 48 from the bottom of the frame.
Mounting a bolt lock on door.
Mark where the mounting screws should be placed as well as where the bolt hits the door.
Install the barrel bolt at a height that is easily reachable.
According to merriam webster a deadbolt is defined as.
Place the lock on the sill butting up against the edge of the non moving door so the bolt hits the moving door and the lock is parallel to the ground.
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2 position a flush.
According to ansi specifications for cylindrical or mortise locks.
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Stabilize the door in a door jig or ask an assistant to hold the door on edge.
Lift the door off the hinges and place it on edge with the lock strike of the handle facing up.
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When boring deadbolt locks in a door there are two standards for spacing between the bottom lock and the deadbolt.
A typical placement is one or two feet above the knob but it can be lower.
The closer it is to the center of the door the more.
Open the door 5 and again mark where the bolt hits the moving door.
The lock strike centerline should be 40 5 16 from the bottom of the frame with the lock in relation to the strike.
There are other combinations of spacing which are used on specialty locks however.