THE SUPERSTRUCTURE OF THE ST.JOHN ARCH (INCLUDEING PLATE AT VACK OF VOLUME).
Selected Papers.] DUGCAN ON SUPERSTRUCTURE OF ST. JOHN ARCH. 255 SECT. 11.-OTHER SELECTEDPAPERS. (Puper No. 4267.) The Superstructure of the St. John Arch." By GEORGE HERRICK DUGQAN, Inst. C.E. M. THE St. John archranks highamong the longspanbridges of Canada,beingonly second in span to the Quebec Bridge, but its interest lies chiefly in its surroundings, in the low rise of about one-ninth of the span and, consequently, inthe comparatively heavy stresses met the in cantilever erection of each half of the arch...
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