Quote#Wisdom
[A] brick arch four feet six inches in span, ten per cent... rise,…
Quote byRafael Guastavino · 1842–1908
Commonly attributed — not confirmed in an authoritative edition. Cited on Wikiquote to: Part III. Theory and Coefficients of Application.
English (original)
[A] brick arch four feet six inches in span, ten per cent... rise, and four inches thick, with cement mortar... [is] equivalent to a ten or twelve foot span in a "Timbrel Arch," three inches thick, and with an eight to ten per cent rise.
— Rafael Guastavino
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