. The elements of railroad engineering . ScaU of forces 1=100 of distance 1=8. Fig. 227. right of /, between /c and /, the vertical shear is positive, and is equalto 70 lb.; hence, lay off /t ^ upwards equal to 70 lb., and draw g rhorizontal. The line, O 5-0-7 ;/^ ;-is the shear line. Measur-ing O M, k >i, and /- ^, it is found that O M = 77 lb., kn — — 10;^ lb., andkq — 1^ lb. ; therefore, k n = — 103 lb. = maximum vertical shear; c iis evidently the maximum/; hence, the maximum bending moment = STRENGTH OF MATERIALS. 491 Hy = = 200x 26 = 5,200 Any value oi y measur
. The elements of railroad engineering . ScaU of forces 1=100 of distance 1=8. Fig. 227. right of /, between /c and /, the vertical shear is positive, and is equalto 70 lb.; hence, lay off /t ^ upwards equal to 70 lb., and draw g rhorizontal. The line, O 5-0-7 ;/^ ;-is the shear line. Measur-ing O M, k >i, and /- ^, it is found that O M = 77 lb., kn — — 10;^ lb., andkq — 1^ lb. ; therefore, k n = — 103 lb. = maximum vertical shear; c iis evidently the maximum/; hence, the maximum bending moment = STRENGTH OF MATERIALS. 491 Hy = = 200x 26 = 5,200 Any value oi y measured inthe -polygon g-a d c dsg is positive, and any value measured in thetriangle e h s is negative. Consequently, the bending moment for anypoint between s and the vertical, through the center of the , is negative, since//X (—^)= — Hy. In all cases, when design- 5«5 -^. ^5100\ 6 CI 5- Z&. ^-C^x, 15[ J20 tm^^iTo ^> J4Q, 22Ih. Scale 1=6Scale i^j
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
