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A joggle is a joint or projection that interlocks blocks (such as a lintel's stone blocks or an arch's voussoirs). Often joggles are semicircular and knob-shaped, so joggled stones have a jigsaw- or zigzag-like pattern.

Joggling can be found in pre-Frankish buildings, in Roman Spain and Roman France. In Islamic architecture, the earliest joggles were in the desert castles of the Umayyad Caliphate, such as Qasr al-Hayr al-Sharqi. In Mamluk architecture, joggling is usually combined with ablaq (alternating colors). Joggling also characterize Ottoman architecture in Cairo.

The protruding joggle is also called a "he-joggle", whereas the corresponding slot is called a "she-joggle".

See also

• Dovetail joint: dovetailing can be considered a type of joggling.

References

1. von Reber, Franz (1887). History of Mediaeval Art. Harper & brothers. p. 205. The round arches of these niches show a joggling of the voussoirs rare in Roman architecture
2. ^ Boas, Adrian J. (2010). Domestic Settings: Sources on Domestic Architecture and Day-to-Day Activities in the Crusader States. Brill. p. 68. ISBN 978-90-04-18272-1.
3. AlSayyad, Nezar (2011). Cairo: Histories of a City. Harvard University Press. p. 164. ISBN 978-0-674-06079-1.
4. Hodgson, Frederick Thomas (1905). The 20th Century Bricklayer's and Mason's Assistant. F.J. Drake & Company. p. 241.
5. The industrial self-instructor and technical journal. Ward, Lock and co. 1884. p. 87.

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