An arched structure of stone, brick, or reinforced concrete, forming a ceiling or roof over a hall, room, or other wholly or partially enclosed space
VAULT
a course of keystones in the crown of a masonry vault
KEY COURSE
a horizontal course forming the abutments or springers of a masonry vault
VAULTING COURSE
an arch force stiffening a barrel vault or supporting a groin vault
TRANSVERSE ARCH
a bay between two transverse arches in a vaulted structure
SEVERY
An external support built to stabilize a structure by opposing its outward thrusts, esp. a projecting support built into or against the outside of a masonry wall
BUTTRESS
A vault constructed by corbelling courses of stone masonry; the resulting stepped surface can be smoothed or curve, but no arch action is incurred
CORBEL VAULT
An inclined bar of masonry carried on a segmental arch and transmitting an outward and downward thrust from a roof or vault to a solid buttress that through its mass transforms the thrust into a vertical one
ARC-BOUTANT/FLYING BUTTRESS
A subordinate vertical structure terminating in a pyramid, or spire, used esp. In Gothic architecture to add weight to a buttress pier
PINNACLE
The part of a pier that rises to take the thrust of a flying buttress
BUTTRESS PIER
A sloping top on a buttress or projecting pier to shed rainwater
AMORTIZEMENT
A projecting edge of a buttress
NOSING
a distinct, slender, vertical masonry feature engaged in a wall or pier and supporting or feigning to support an arch or a ribbed vault
SHAFT
A shaft that leads to the springer of a rib or group of ribs, either rising from the ground or from a corbel at a greater height in the face of the masonry
VAULTING SHAFT
a vault having a semicircular cross-section
CRADLE VAULT/TUNNEL VAULT/WAGON VAULT/BARREL VAULT
a vault having a circular cross-section that is larger at one end than the other
CONICAL VAULT
a vault springing from an abutment higher at one side than the other
RAMPANT VAULT
a barrel vault having a circular plant in the shape of a ring
ANNULAR VAULT
a compound vault for covering a triangular space formed by the intersection of three barrel vaults
TRIPARTITE VAULT
one of the curved lines or edges along which two intersecting vaults meet
GROIN
a compound vault formed by the perpendicular intersection of two vaults forming an arch diagonal arrises called groins
CROSS VAULT/GROIN VAULT
a compound vault having a central vault intersected by vaults of lower pitch
WELSH VAULT/UNDERPITCH VAULT
A compound vault having a narrower transverse vault springing from a higher level so that the ridges are at the same height
STILTED VAULT
a compound vault formed by four vaults meeting along diagonal vertical planes
COVED VAULT/CLOISTER VAULT