. Railway mechanical engineer . ll three of our assumed spacings is such asto cause a positive reaction at each spring seat for the actiondue to the horizontal force alone, irrespective of its amount. Based upon the same assumption that a horizontal forceequal in amount to of the vertical load, acting at apoint 72 in. above the rail, the bolster reactions, due to thereactions at the side bearing as determined in the precedingparagraph as well as the bolster reactions due to the directvertical load, are also noted at the low-er right and left handcorners of each of the diagrams of Fig. 4. T
. Railway mechanical engineer . ll three of our assumed spacings is such asto cause a positive reaction at each spring seat for the actiondue to the horizontal force alone, irrespective of its amount. Based upon the same assumption that a horizontal forceequal in amount to of the vertical load, acting at apoint 72 in. above the rail, the bolster reactions, due to thereactions at the side bearing as determined in the precedingparagraph as well as the bolster reactions due to the directvertical load, are also noted at the low-er right and left handcorners of each of the diagrams of Fig. 4. These reactions The figures at the lower right hand corner of the dia-grams represent the bolster reactions at the right point of.■-upj)ort corresponding to the bolster reactions at the left|)oint of support as determined above. These reactions atthe right point of support are minimum reactions for thiscondition of loading and will be found to be per per cent and 110 per cent respectively, of the normal TT -38i-. \ 74,9}2li. 3i,S0OLb $20lb. Fig. 5—Diagr -Diagrams Sliowing the Reactions Due to Combined Verticaland Horizontal Forces of Bending IVIoments Due to Combined Verticaland Horizontal Forces reaction of 36,500 lb., due to the direct static load of 73,000lb. acting at the bolster center plate. Were the horizontal load assumed to act in the oppositedirection, or towards the right, these reactions at the rightand left points of support would be merely transformed,i. e., the maximum reaction would occur at the ight sup-port and the minimum at the left support. According totlie method of loading outlined in Example 4, (A) and (B),and illustrated by the fifth diagram of Fig. 1, the maximum Jj-—ic- 4 -- were determined, of course, by considering the bolster as asingle beam supported at the ends, and carrying a singleconcentrated load. Thus in the group of figures in thelower le
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
