. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ng or operatingstandpoint that can cause any hesitationwhatsoever. 306 RAILWAY AND LOCOMOTIVE ENGINEERING October, 1919 Diagonal Frame Bracing of Freiglit Cars There arc two methods ol placingdiagonal braces in car framing betweenthe end sill and the bolster. One isto run them from the junction of theend and center sills out to the end ofthe bolster and the other to run themfrom the corner of the car in to thejunction of the center sills with thebolster. The two methods are shownin the line d
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ng or operatingstandpoint that can cause any hesitationwhatsoever. 306 RAILWAY AND LOCOMOTIVE ENGINEERING October, 1919 Diagonal Frame Bracing of Freiglit Cars There arc two methods ol placingdiagonal braces in car framing betweenthe end sill and the bolster. One isto run them from the junction of theend and center sills out to the end ofthe bolster and the other to run themfrom the corner of the car in to thejunction of the center sills with thebolster. The two methods are shownin the line drawings, Figs. 1 and 2,respectively. Each has its advocates or each sill to be ol an approved steel con-struction with a sectional area of 24sq. in. Its natural elasticity causes itto yield under every impact; theamount of which depends upon theintensity of the blow, its own rigidityand the solidity of the supporting baseat the other end, which may range allthe way from nothing with the carstanding alone and free to move toimmobility with its drawbar in contactwith a buffing block. /V<7. A/9; would not be represented in currentcar construction. A brief resume ofthe arguments in behalf of each may bestated as follows: The use of diagonal braces from thecenter out to the end of the bolster(Fig. 1) relieves the end sill of allbuffing stresses and carries a portionof these stresses out to the end of tin-bolster where they are absorbed anddistributed by the bolster and the sidesills and framing of the car. Diagonal braces from the corner tothe center (Fig. 2) stiffen the corners,prevent yielding and distortion underpoling stresses, put a portion of thebuffing stress on the end sill, and,finally, after putting a portion of thestress on the side sills carry the bal-ance back to the stiff center sills. From an examination of a number ofcars that have been damaged by endblows it would seem that the methodof placing the braces shown in Fig. 1is much superior to that of Fig. 2. If a
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