Canadian engineer . ow of the water,and at the sametime greatstrength was ob-tained. The re-sistance powerwas brought outby the fact thata steamer in try-ing to pass underthe bridge athigh tide inad-vertently strucktwo of the pilesand broke themoff, (Fig. 8). Not-withstanding thisaccident the scaf-folding was stillable to supportthe recently plac-ed concrete. The scaffolding was built up so that each row of columnsrested on 16 concrete piles placed in two rows and connectedabove the water-line by a beam,(Fig. 9) ; each group of pilesconstitutes a support for reinforcedconcrete columns, which a
Canadian engineer . ow of the water,and at the sametime greatstrength was ob-tained. The re-sistance powerwas brought outby the fact thata steamer in try-ing to pass underthe bridge athigh tide inad-vertently strucktwo of the pilesand broke themoff, (Fig. 8). Not-withstanding thisaccident the scaf-folding was stillable to supportthe recently plac-ed concrete. The scaffolding was built up so that each row of columnsrested on 16 concrete piles placed in two rows and connectedabove the water-line by a beam,(Fig. 9) ; each group of pilesconstitutes a support for reinforcedconcrete columns, which are againframed together by a second crossbeam, on which were laid wedgesand wood beams for the forms. The columns and beams forthis scaffolding were constructedseparately, floated to the bridgeand joined together by the rein-forcement, filled out with cementmortar. The erection thus occu-pied a very short space oftime. A concrete mixture of 500 lbs. of cement percubic yard was used, and the consistency was very
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
