Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 132
TO ^rT^rT-rT~^i^f^ T->-»: T-r T-r r - r 1--r:»il- … Half Elevation and Section Fig. 50. stone or plain concrete. Variations in the loading of an arch willcause such a change in the line of pressure, and such a variation inthe place where a tendency to bending may occur, that it is usual toplace two layers of bars, one slightly within the extrados of…
Architecture · Building · Carpentry
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