Door fitting glossary

On this site, “existing door slab” labels the panel-only measuring mode, in contrast with measuring a frame opening. It is plain-language worksheet vocabulary, not an externally sourced equation of slab with door leaf. Choose the measuring mode.

The fixed assembly around the moving leaf. UK merchant sources say frame is typically used for external work while lining or casing is often used internally, but also acknowledge interchangeable everyday usage. The physical part must be identified before measuring. Frame terminology source.

A common UK name for the timber head-and-jamb assembly fitted into an internal opening. A lining surrounds the leaf; it is not a leaf dimension. Some instructions use frame or casing instead, so confirm the labelled section. See the illustrated comparison.

The top horizontal member of a wooden frame in the BWF glossary. “Head” names one member, not the whole surrounding assembly.

A vertical side member of a door or window frame in BWF usage. Door instructions may further label hinge jamb and latch jamb by function. A jamb is one part; it is not the entire frame or lining.

A slim piece inside the lining that limits where the leaf sits when closed, according to the accepted merchant terminology evidence. This definition describes the stop only; it makes no claim about alternative constructions. Door stop source note.

The vertical side of an opening in a wall in the BWF glossary. It describes the opening surface, not the door leaf and not automatically the face of a jamb.

A step formed along an edge. This noun is a cautious rendering of BWF’s “rebated” definition: an edge cut to form a step, usually as part of a joint. The evidence supplies no universal rebate depth, position or application.

The physical entrance-floor part at the base of a doorway, using only the Cambridge Dictionary doorway sense. This is vocabulary, not product-selection guidance. It does not establish that threshold and sill are always the same or always different.

The lowest horizontal member of a stud partition or the lowest horizontal member of a door or window frame in BWF usage. Preserve the author’s label on a drawing; do not substitute “threshold” without checking the intended part.

Decorative moulding used around an interior doorway to cover the wall-to-frame join. It is face trim, not the inner stop or a measurement of the leaf. Wickes architrave source.

BWF defines casing as the timber lining of a door opening. Other instructions use casing differently, and merchant wording is not strict. This guide does not infer that casing always means lining or that it means architrave.

One of the two wings of a butt hinge: one attaches to the moving part and the other to the fixed part in the accepted basic parts description. This definition does not select a hinge or state a load or fire rating. Butt-hinge parts source.

The curled barrel connection joining the two hinge leaves in the cited butt-hinge description. The pin runs through this joint on common butt-hinge forms, but product construction must still be checked.

This guide’s diagram label for the edge opposite the hinge side, where latch-side observations are recorded. It is a local orientation label, not a claimed universal definition.

This guide’s worksheet record of a declared viewpoint, hinge side and opening movement. It produces a plain-language sentence rather than claiming one universal left-hand or right-hand trade code.

This guide’s check that a jamb or other member intended to be vertical is vertically aligned. It does not set a permitted tolerance or certify the opening.

This guide’s check that a head, threshold or other member intended to be horizontal is horizontally aligned. The term supplies no universal tolerance.

This guide’s shorthand for checking rectangular assembly geometry. Comparing diagonals can record an observation, but this definition does not invent an acceptable difference or structural verdict.

A clearance value entered by the user in a worksheet for a specific leaf and opening. It is an input, not a default standard. Product, fire, seal and fitting instructions must supply any required value.

The maker- or product-specific amount a worksheet user records as permitted removal at a named edge. There is no universal per-edge amount here, and an entered allowance is not permission to cut or a warranty statement.