What Are The Parts Of An Arch
explain various terms related to masonry arches with a neat diagrams (Sol) (a) intradose : this is the inner curve of arch  (B) soffit : this is the inner surface of the arch   (3) extra dos or back : this is the external curve of an arch (4) voussoirs : these are the wedge shaped units forming the courses of an arch  (5)crown : this is the highest point of the extrados  (6) key : this is the wedge shaped unit at the crown of an arch It is sometimes made prominent by making it of a lar
