London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 306
heone sixth of the span, the reduction in the height of the pier mustbe 2 ft. 3 in. Now, this sum, taken from the span of 14 ft. 3 in.,makes the true height of the pier to be 12 ft.: but the height ofthe pier is 11 ft. 2 in.; therefore it is 10 in. within the balancingpoint. On submitting one arch… … masonry was erected on the arch, equal to the proportions repre-sented in the engraving, and as contained within the dotted linesand the piers b e, fc, the arch and piers carried on a 2^ lb.Now, the weight of one pier equals If lb.; consequently, thearch will carry, or balance with, nearly twice…
Architecture
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