Rib vault
From Wikipedia, the free encyclopedia
A rib vault or ribbed vault is any vault reinforced by masonry ribs. A rib vault may be a quadripartite rib vault (which is divided into four sections by two diagonal ribs) and a sexpartite rib vault (a rib vault whose surface is divided into six sections by three ribs).
There is more information on the rib vault at the main article for vaulting.