Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 458
er, such joints are purposely made not continuous. Intrados—The inner or lower surface of an arch. The term isfrequently restricted to the line which is the intersection of the innersurface by a plane which is perpendicular to the axis of the arch. Keystone—^The voussoir which is placed at the… … Fig. 218. Parts of a Typical Arch. Ring Stones—^The voussoirs which form the arch ring at each endof the arch. Skewbacks—The top course of stones on the abutments. Theupper surfaces of the stones are cut at such an angle that the surfacesare approximately perpendicular to the direction of the…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
