. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ich the car maybe subjected. The bolster, cast integrally with the body of thesills, extends out on each side and with its smoothupper surface serves as a resting place for the sills. The upper framing of the car is of wood and iscarried on this underframe casting, very much as acontainer might be carried on a flat car. The general details of this construction are shownby the two half cross sections. These show that there are eight longitudinal sillsand that they rest on the main casting at t
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ich the car maybe subjected. The bolster, cast integrally with the body of thesills, extends out on each side and with its smoothupper surface serves as a resting place for the sills. The upper framing of the car is of wood and iscarried on this underframe casting, very much as acontainer might be carried on a flat car. The general details of this construction are shownby the two half cross sections. These show that there are eight longitudinal sillsand that they rest on the main casting at the bolsterand near the center are carried by two needle beamsas is clearly illustrated by the reproduction of thephotograph of the car. It is on these sills that the upper framing of the spaced 8 ft. apart from center to center at the centerof the car as will be seen from the reproduction of thephotograph; their total drop being about 31 in. so thatthe trussing efTect is stiff and substantial. As the needle beams serve only as a point of sup-port for the king posts, it is unnecessary to carry them. At Center of Car At Bolster Half Sections of Southern Pacific Box Car all of the way across the car, and so they are cut offand fitted in to the side of the main casting, the spaceabove thcni between the sills being filled in, and theneedle beams themselves bolted both to the fillers andthe sills. The whole weight of tlie car thus rests upon themain underframe casting and could, if necessary, be 2A2 RAILWAY AND LOCOMOTIVE ENGINEERING AuRiist. 1P23 cast loose and lifted frnm it. And it is the castinj;that sustains all of the pulliii), and hii(tinj, stresseswithout putting any on the car framing at all. Thedesign is believed to he uni(|ue, and is only possibleof construction because of the ability of the steelfoundrymen to make a casting of such large dimen-sions and of such thin sections. Attention is also invited to the stantlard A. R. .\.draft gear pocket which is 9 x 12j)i x 24-^.s
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
