Thorpe, William Henry · London, E. & F.N. Spon, limited; New York, Spon & Chamberlain · leaf 134
or has not known it to be applied in its entirety asa means of strengthening an old floor. A simple and very common device consists in substitutingfor the ordinary cross-sleeper road, where this exists, stouttimber longitudinals under the rails, which have, where thecross-girders do not exceed 5… … Pig. 69. the depth available is not enough to enable suificiently stifftimbers to be used alone. In either case the object soughtis the same—to modify the effect of the heavier wheel loadsupon isolated cross-girders. When the spacing is so closeas 4 feet, the beneficial result of this treatment is…
Bridges
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
