French, Arthur Willard, 1868-, Ives, Howard Chapin, 1878-1944. joint author · New York, J. Wiley & Sons. Inc.; London, Chapman & Hall, Limited · leaf 125
re used in its calculation. The soffitof the arch is cylindrical, as in the helicoidal method. In this method the soffit coursing-joints are perpendicular tothe plane of the arch face wherever they come in contact withit. The heading-joints on the soffit are elliptical curves parallelto the arch… … Pig. 47. The widths of the courses are fixed on the curve EF midwaybetween the curves of the developed faces of the arch. Thedeveloped heading-joints are drawn parallel to the curve AC.The coursing-joints are at right angles to the heading-joints. THE OBLIQUE OR SKEIV ARCH. loi The coursing-beds in…
Stereotomy
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