. The Street railway journal . FIG. 6.—SOLID BAR FRAME. FIG. 7.—TRUCK WITH SOLID BAR FRAME upon the builders who had thought of the subject in a superficialmanner only. The truss is naturally the first thing that comesinto the mind, because the load seems to be the most importantfactor in the problem. A little practical experience was required toshow the fallacy of the idea, and it is sur-prising that it has retained its hold uponstreet railway men so long. It needs nostudy to prove a truss weak in all directionssave one. It is a metal frame so disposedas to prevent the greatest resistance to
. The Street railway journal . FIG. 6.—SOLID BAR FRAME. FIG. 7.—TRUCK WITH SOLID BAR FRAME upon the builders who had thought of the subject in a superficialmanner only. The truss is naturally the first thing that comesinto the mind, because the load seems to be the most importantfactor in the problem. A little practical experience was required toshow the fallacy of the idea, and it is sur-prising that it has retained its hold uponstreet railway men so long. It needs nostudy to prove a truss weak in all directionssave one. It is a metal frame so disposedas to prevent the greatest resistance to avertical load, with an entire disregard ofstrength in any other direction. In both lo-comotives and electric trucks the twistingand horizontal thrusts are often nearly, ifnot quite, as great as those exerted in a ver-tical plane by the load. There must be, there-fore, horizontal as well as vertical addition to this, there is another elementwhich is rarely given sufficient attention, thehammering and pounding of a locomotive oran electri
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
