. The Street railway journal . N()KT1[ OF BRIDCE. ALL Sl^ANS ERECTED The sectional forms for the ribs of all four arches were setin this manner before concrete was placed in any of sequence of operation was necessitated by the fact thatthe piers would not have been stable under the unbalancedhorizontal thrust caused by placing the concrete in the archrib forms for one span before the skeleton arch of the adjoin- PAIR OF RIB SECTIONS CONNECTED BY LIFTING FRAME uniformly over them and then following up with the remain-der of the concrete. The concrete in the arch ring and t
. The Street railway journal . N()KT1[ OF BRIDCE. ALL Sl^ANS ERECTED The sectional forms for the ribs of all four arches were setin this manner before concrete was placed in any of sequence of operation was necessitated by the fact thatthe piers would not have been stable under the unbalancedhorizontal thrust caused by placing the concrete in the archrib forms for one span before the skeleton arch of the adjoin- PAIR OF RIB SECTIONS CONNECTED BY LIFTING FRAME uniformly over them and then following up with the remain-der of the concrete. The concrete in the arch ring and thetransverse beams were made continuous by the openingsthrough the inner walls of the sectional forms, and the entireconstruction thus rendered monolithic. After the arch ringhad been completed in this manner, the spandrel walls andfloor slab were built in ordinary wooden forms. The erection of the arch rings was successfully completedin a comparatively short time, notwithstanding the fact thatonly unskilled labor was employed
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
