Easy steps in architecture and architectural drawing .. (1915)
Hodgson, Frederick Thomas, 1836- [from old catalog] · Chicago, Ill., Printed by F. J. Drake & co. · leaf 531
heelliptical arch shown at Fig. 129, we must pro-ceed as follows: Let ZZ be the foci, and B apoint on the intrados where a joint is required;from ZZ draw lines to B, bisect the angle at Bby a line drawn through the intersecting arcsD produced for the joint to F. Joints at i and2 are found in the… … voussoirs near the springing line of the arch arethus increased in size for greater strength.The diagram shown at Fig. 130 shows a lancet A 6—ff—!—JB-I.
Architecture · Architectural drawing
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