Identifier: railwaylocomotiv19newy Title: Railway and locomotive engineering : a practical journal of railway motive power and rolling stock Year: 1901 (1900s) Authors: Subjects: Railroads Locomotives Publisher: New York : A. Sinclair Co Contributing Library: Carnegie Library of Pittsburgh Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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Text Appearing Before Image: at to do in emergencies, is one of thefeatures of the work. The book con-tains numerous tables and engineering(lata, and is about 45^x6H ins. It has,with index, 630 pages, and is well illus-trated. The book is bound in a flexibleleather cover. The .Argentine Congress has author-ized the construction of 2,500 miles ofrailway, and it is said that French andBelgian capitalists have offered to sup-ply the necessary funds. April, 1906. RAILWAY AND LOCOMOTIVE HNGIN-KERING 161 Black River Bridge, N. Y., C. & St. L. Tlic bridge over the Rlack river atLorain, Ohio, on the New York, Chica-go & St. Louis Railroad, commonlycalled the Nickel Plate, is for a singletrack, and consists of a swing span andone fio ft. plate girder span. Our illus- and followed by a train of 4,000 lbs. perfoot. The swing span is operated bytwo 30 li.p. electric motors. The prin-cipal members of the bridge are com-posed of medium steel having an ulti-mate tensile strength of from fio.ooo to70,000 lbs. per sq. in.

Text Appearing After Image: HI.ACK RIVKK SWING URIUGE; trations show a passenger train cross-ing the river on this structure. We have called the movable part ofthe bridge a swing span instead of say-ing draw bridge, for the reason thatthe span, as its name implies, swingsabout a center and when open standsat right angles to the railway line andparallel to the stream. A draw bridge,strictly speaking, is a bridge which ishinged at one end and can be pulled upinto a vertical position. The typicaldraw bridge of old days was used tospan the moat about a castle and whenpulled up practically made the strong-hold into an island. The modern ap-plication of the draw bridge idea is tobe found in the roller lift or basculebridges, which are used on a good manyof our railways. The swing span of this bridge is athrough girder, which means that thetrusses are above the bridge floor andthe train runs through between them.The approach span of this bridge is adeck plate girder. This refers to thefact that the girder is below the

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