Arch Flashcards
masonry arch
An arch constructed of individual stone or brick voussoirs
keystone
The wedge-shaped, often embellished voussoir at the crown of an arch, serving to lock the other voussoirs in place
voussoir
Any of the wedge shaped units in a masonry arch or vault, having side cuts converging at one of the arch centers
extrados
the exterior curve, surface, or boundary of the visible face of an arch. Also called back.
springer
The first voussoir resting on the impost of an arch
archivolt
A decorative molding or band on the face of an arch following the curve of the intrados
intrados
The inner curve or surface of an arch forming the concave underside
rise
the height of an arch from the spring line to the highest point of the intrados
spring
The point at which an arch, vault, or dome rises from its support. also, springing
crown
the highest part or point of a convex construction, such as an arch, vault, or roadway
spandrel
the triangular shaped, sometimes ornamented area between the extrados of two adjoining arches, or between the left or right extrados of an arch and the rectangular framework surrounding it. also, spandril
haunch
either side of an arch curving down from the crown to the impost
impost
the uppermost part of an abutment, often in the form of a block, capital, or molding, from which an arch springs
order
any of several concentric rings of masonry forming an arch, esp when each projects beyond the one below
lag
a crosspiece connecting the ribs in a centering. also called bolster