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.2 In Islamic architecture, the earliest joggles were in the desert castles of the Umayyad Caliphate, such as Qasr al-Hayr al-Sharqi.2 In Mamluk architecture, joggling is usually combined with ablaq (alternating colors).2 Joggling also characterize Ottoman architecture in Cairo.3
The protruding joggle is also called a "he-joggle", whereas the corresponding slot is called a "she-joggle".4
References
References
- 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
- 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.
- AlSayyad, Nezar (2011). Cairo: Histories of a City. Harvard University Press. p. 164. ISBN 978-0-674-06079-1.
- Hodgson, Frederick Thomas (1905). The 20th Century Bricklayer's and Mason's Assistant. F.J. Drake & Company. p. 241.
- The industrial self-instructor and technical journal. Ward, Lock and co. 1884. p. 87.