Joggle

Joggled voussoirs
Term used to describe a method of construction where stones in an arch or composite lintel are interlocked.
Definition ...

joggle post
n
(Miscellaneous Technologies / Building) a post or beam consisting of two timbers joined to each other by joggles ...

Joggle, Joggling - Masons' terms for joining two stones in such a way as to prevent them from slipping or sliding, by means of a notch in one and a corresponding projection in the other. It is often seen exposed on the face of a flat arch.

Joggled - Keyed together by overlapping joints.
Joist - Wall-to-wall timber beams to support floor boards.
Keep - A strong stone tower; main tower; donjon; stronghold.

Joggle
- a masons term to describe a any sort of joint which fits two stones together, in which the projection or joggle is part of the stone. Could range from a simple tongue and groove to a dovetail.

19. The joggled arch used in medieval chimneypieces and in Mahommedan archi- tecture.
zo. The discharging or relieving arch, built above the architrave or lintel to take off the weight of the super- structure.

Jib doorA concealed door, made flush with the wall surface and treated to resemble it; sometimes spelt gib door.JoggleThe joining of two stones to prevent them slipping, by a notch in one and a projection in the other; hence joggling.

See also: Architecture, Vault, Ground, Voussoir, Voussoirs