4. Introduction
An arch may be defined as mechanical
arrangement of wedge shaped blocks of
stoned or bricks supporting each other and
supporting at the end by piers or abutments.
In common with lintel , the function of an
arch is to carry the weight of the structure
above the opening .
5. Technical Terms
KEY STONE CROWN SRANDRIL
INTRADOS
SPRINGER
SPAN
PIER
IMPOST
ABUTMENT
EXTRADOS
HAUNCH
RISE
SPRINGING
LINE
ABUTMENT OR PIER
INTRADOS
EXTRADOS
SPRINGING LINE
CROWN
KEY STONE
SPAN
SPANDRIL
HAUNCH
SPRINGER
IMPOST
RISE
ARCH