. Journal. ing the effective area, and necessarily the extreme fibres, to aworking strain of 5, or breaking strain of 20 to 22 tons. Hebad noticed an observation that bad often been made withrespect to these new floors, viz. that the rivets were weak, orthe line of rivets the weakest portion, that is to say, that therivets connecting the flutes together would be much punishedby a travelling load. But this was not the case. The severeststrains came upon the top or bottom tables; as might be shownby taking a rolling load of 12 tons distributed by sleeper andrail over four troughs, or say 7 feet.
. Journal. ing the effective area, and necessarily the extreme fibres, to aworking strain of 5, or breaking strain of 20 to 22 tons. Hebad noticed an observation that bad often been made withrespect to these new floors, viz. that the rivets were weak, orthe line of rivets the weakest portion, that is to say, that therivets connecting the flutes together would be much punishedby a travelling load. But this was not the case. The severeststrains came upon the top or bottom tables; as might be shownby taking a rolling load of 12 tons distributed by sleeper andrail over four troughs, or say 7 feet. The obliqueness of thesides would increase the shearing strain to about 14^ the floor to have a full span of 16 feet for single lineof railway, the length from wheel poiut to bearing would be5 feet 6 inches, in which length No. 16 rivets § inch diameter,would be necessary ; whereas in the four troughs there would beeight rows, or No. 128 rivets at 4 inches pitch, having an Plate 1. •60* ET. 14 FT APART.
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
