The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 308
Fig. 253. should not be attempted, as it is evident that such a system o(framing is capable of a tremendous lateral thrust. … Fig- 254 401.—Fig. 254 represents a wooden bridge in which a built-i ib,(see Art. 385,) is introduced as a chief support. The curve otequilibrium will not differ much from that of a parabola: this,therefore, may be used—especially if the rib is made gradually alittle stronger as it approaches the…
Carpentry · Architecture
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