An Arch is a structure that is composed of a wedge-shaped unit. The internal curve of an arch is recognized as Intrados and the external curve of the arch is recognized as Extrados. The major function of the arches is to support the load of the amount of the wall which is positioned above the openings.
Types of Arches
have been a common element in architecture since the time of the Etruscans who are placed with its innovation, although the Romans improved it further and circulate its use. The techniques included in designing and constructing arches have since been acquired into several other structural forms, containing vaults, arcades, and bridges.
