How Is the Backset Classified in Door Locks?

Backsets in mortise locks are classified according to various DIN standards, which specify requirements for different types of locks. The most common standards include:

DIN 18 251: Standard mortise locks. https://locksmithcal.com/locksmith-bakersfield-ca/

DIN 18 251-1: For rebated doors (doors with an "L"-shaped edge).
DIN 18 251-2: For tubular frame doors.
DIN 18 251-3: For doors with multipoint locking systems.
DIN 18 250: Mortise locks for fire-rated doors.

E DIN EN 12 209-1: Mechanically operated locks.