. Railway maintenance engineering, with notes on construction . eseties in which the concrete is encased in a steel shell. Two designsof this latter type have been experimented with, the Riegler tie,fifteen of which were put in the main track of the PennsylvaniaLines, in May, 1908, where they are subject to very heavy traffic,and are apparently giving satisfactory service; and the Atwoodsteel tie. Several of the Atwood ties were installed on the Pitts-burgh and Lake Erie Railroad in October, 1908. These gave goodresults, but suggested some improvements in design. Fig. 48shows the most recent d
. Railway maintenance engineering, with notes on construction . eseties in which the concrete is encased in a steel shell. Two designsof this latter type have been experimented with, the Riegler tie,fifteen of which were put in the main track of the PennsylvaniaLines, in May, 1908, where they are subject to very heavy traffic,and are apparently giving satisfactory service; and the Atwoodsteel tie. Several of the Atwood ties were installed on the Pitts-burgh and Lake Erie Railroad in October, 1908. These gave goodresults, but suggested some improvements in design. Fig. 48shows the most recent design of the Atwood tie. TIES 77 This tie is not strictly a concrete tie. Mr. Atwood states:* The fact that concrete is used as a filler and to keep the two portionsof the steel tie in alignment and to gauge does not constitute this a con-crete tie. A tie is for the purpose of supporting the load that is trans-ferred to it through the rails. The concrete fiher in this tie is not calledupon to carry this load; the load is carried entirely by the steel portions.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
