A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 225
ntedin the center and elliptical near the springing joints, areoften used in architectural work. These may be formedeither of true elliptic curves, or of 3 or 5 centered circulararcs. Very flat elliptical arches are not suitable for anyconsiderable span, and, if built, should have large piers… … ellipse is similar to that given under the heading, InvertedArches, Masonry, §7. The radius for the middle of thearch is a b; the radii for the two haunches are the lines c d. 8 MASONRY. 55 The joints of the voussoirs in the central portion are drawnwith a as a center, as at cc, etc.; and the…
Architecture · Building
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