Transactions of the Institute of British Architects of London (1835)
Royal Institute of British Architects · London · leaf 122
56 Messrs. Smith on Whinstone Constructions, &c. trados and the intrados; but when it is unequally balanced, the pressure is wholly upon a very small part of the section, as will appear by the follow- ing diagram. … The pressure upon a a a a a a being too much for b, the arch rises at b, therefore the whole weight of the arch rests upon a very small part of the section, and is apt to break the stones at a and c, where the joints are close. If the arch be overloaded at b, it will present this appearance, b will…
Architecture
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