Bucket pointed vault, as the bedroom for the house of Satprem Maïni Bedroom with a half bucket pointed dome

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

>Laying the blocks of the arch on the window frame as a centring	Laying the blocks in the corner and puling the string line	Puling the string line to check if the block of the arch is well laid
Building the arch symmetrically	Puling the string line and checking the block of the archs	Building the arch symmetrically
Completing the arch	Laying the last blocks above the arch	Removing the window frame, used as a centring
Starting the bucket pointed vault	Laying blocks of the bucket pointed vault	Laying a triangular mortar
Stability limit with the horizontal courses	Laying the first keystones	Laying keystones
Completing the vault	Vault completed	Starting the dome with 29 cm thick blocks
Building the dome	Completing the dome	Half dome completed
Starting the segmental vault	Laying stepped courses of the segmental vault	Laying blocks above the string lines
Segmental vault in progress	Joining the segmental vault with the adjacent vault	Joining the vaults
Gap left for ventilation	Coping for the waterproofing, before laying the ferrocement cover	Completing the segmental vault on the other side
Bucket pointed vault completed	Bedroom (Bucket pointed vault) living room (equilateral vault)	Bedroom from inside