Segmented
This type of vault is is composed of adjacent and/or intersecting surfaces. This kind of solution is reminiscent of the roofing needs – albeit not stereotomic – found in ancient structures such as neolithic tholos, where a rectangular corridor met a circular space, exhibiting the need to solve the roofing intersection between these two geometries. The groin vault, arguably introduced by Macedonians in around 200 BC (Boyd, 1978), is also composed of parts of barrel vaults. In a more complex case, the vault of the vestibule of the Hôtel de Ville d’Arles is composed of 17 parts of vaults, of 5 different types.
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