Lock backset
The Guild of Architectural Ironmongers publication 'Glossary of architectural hardware terms' defines a backset, a lock backset (or sometimes called a door backset or the backset of a door) as 'The horizontal distance measured from the outside face of the forend to the centre of the keyway (or cylinder), or to the centre of the follower or to both.'
Here the forend refers to the visible part of the lock on the door surface once fitted, the keyway is the hole or aperture in the cylinder where the key goes ( also just called a key hole) and the follower is the hole in the door into which the lock cylinder or spindle is fed.
[edit] Related articles on Designing Buildings
- Access control.
- Digital door lock market.
- Doors.
- Emergency Exit Device.
- Entry control.
- External doors..
- Fire Door Inspection Scheme.
- Fire door.
- Fire Doors (DG 524).
- Fire.
- Grenfell tower.
- Hinge.
- Home security solutions market.
- How door locks work.
- Installing fire doors and doorsets (GG 86).
- Intumescent strip.
- Mortice lock.
- Mortise vs mortice.
- Noise - doors and windows.
- Outbuildings security.
- Perimeter security.
- Protected door.
- Self-closing device.
- Security and the built environment.
- Security glazing.
- Smoke control door.
- Sneck.
- Types of alarm.
- Types of door
- Types of lock.
- Width of doors stairs and escape routes.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
ECA welcomes plans to strengthen subcontractor quality control.
Combining mid-career qualifications with experience broadens career opportunities.
Why being a mentor can help your career.
Channel 4 broadcaster to host 125th anniversary ceremony.
Listed structures on the rail network
Heritage interests and operational requirements must be balanced.
Historic England publishes research into embodied carbon when retrofitting traditional buildings.
New Prime Minister delivers on ECA call for cut in electricity costs.
CIOB reacts to the announcement of Andy Burnham as Prime Minister.
Heritage and conservation science workforce survey - Have your say.
England's Suburbs 1820-2020. Book review.
New, more proportionate and targeted approach for higher-risk building assessments.
Government brings British Steel into public ownership.