Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 192
Fig. 227. should not be attempted, as it is evident that such a system offraming is capable of a tremendous lateral thrust. … Fig. 228. 315.—Fig. 228 represents a wooden bridge in which a builf-rib,(see Art. 299,) is introduced as a chief support. The curve ofequilibrium v\rill 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
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)](https://img.insideoutlibrary.com/img/200/ia-rudimentsofartof00bull-77-48.webp)
