The wedge shaped bricks or blocks forming the courses of an arch ring are known:
ACrown
BSpringer
CVoussoirs
Dspandrel
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Related Questions:
The type of stone masonry in which only large projections in facing are hammer dressed and the surface is left rough is called masonry
Which foundation is suitable to take heavy concentrated load at shallow depth
The slenderness ratio of masonry walls should not more than
Series of step between landing:
Depth of foundation by Rankin's formula is