I y#ifef#^ being thrown on the wing walls, which act as but-tresses (fig. 24.) 3d, where neither of these expedient Fig. 25. … is practicable, by joggling the courses together withbed-dowel joggles, so as to render the whole abutmentone solid mass. 80. Wing Walls.—Where the wing walls of a bridge arebuilt as shown in fig. 26, the pressure of the earth willalways have a tendency to fracture them at their junction 334…
Architecture · Building
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