This vault combines the difficult stability of a pointed arch and bucket one. The stability requirements between a vault and a dome for this kind of shape are different: The vault requires a bottom thickness of 36.5 cm, which decreases till 11.5 cm at the top, and it needs a keystone of a specific weight. But the dome can be started with only 29 cm thickness, which reduces progressively till 7 cm at the apex, and it does not need any keystone.

This arch shape has been used for doing apses of a rectangular room, which has been covered with a segmental vault.

The segmental vault was built with vertical courses. The bucket pointed vault and dome presents these features:
•    2.42 m span, 2.42 m rise, 1.65 m long, 29 to 7 cm thick for the dome and 36.5 to 11.5 cm thick for the vault.
•    They have been built free spanning with horizontal courses