They were also sometimes used for more practical purposes, such as to bring transverse vaults to the same height as diagonal vaults, as in the nave and aisles of Durham Cathedral, built in 1093.
Alwaqqan iyyad t aw axdaman daɣ ittusan ajjotnen šund ag-ay n transverse vault tan s edag ogdahan vault tan win diagonal šund daɣ nave d tišariten n Katedral tan Durham tidayat daɣ awatay wan 1093.