. Railway track and track work . Fig. 96.—Track Crossing Laid on Ties and Long Timbers. 45°, but the arrangement cannot be anything but unsightly, and is inferiorto the second plan. The third plan is the most substantial, especially forangles of nearly 90°, and it affords the best resistance to lateral shifting orcreeping of the crossing. Where a main line crosses a minor line at rightangles, one track may have a longitudinal timber about 6 x 10 ins. or 10 x12 ins., 12 to 14 ft. long under each rail, while the other track has ordinaryties. Tie-plates should be placed on the longitudinal timber
. Railway track and track work . Fig. 96.—Track Crossing Laid on Ties and Long Timbers. 45°, but the arrangement cannot be anything but unsightly, and is inferiorto the second plan. The third plan is the most substantial, especially forangles of nearly 90°, and it affords the best resistance to lateral shifting orcreeping of the crossing. Where a main line crosses a minor line at rightangles, one track may have a longitudinal timber about 6 x 10 ins. or 10 x12 ins., 12 to 14 ft. long under each rail, while the other track has ordinaryties. Tie-plates should be placed on the longitudinal timbers. The Chicago & Eastern Illinois Ry. uses ties and long timbers 8 x 10 ins.,10 ins. apart, for crossings of less than 75°, as shown in Fig. 96, and uses jyvw. Fig. 97.—Track Crossing Laid on Framed Timbers. framed timbers for other angles. The Chicago, Burlington & QuincyRy. usually employs sawed ties, except at right-angle crossings, whereframed timbers are used, as shown in Fig. 97. The New York, New Haven& Hartford Ry. uses frame timbers in all cases, but many roads use switchties (about 7x9 ins., 8 ins. apart) for all crossings up to 80°. The earth 166 TRACK. and old material should be dug out and replaced with broken stone or cleangravel to a depth of 12 ins. on banks, and even deeper in cuts where thedrainage is bad, while tile drains are sometimes laid. It is very importantto have a thoroughly good foundation at the crossing. All important crossings should be equipped with interlocking plant forhome and distant signals and derailing switches, but local conditions mustgovern the application of these switches, as in some cases they may be verydangerous. Every interlocking plant should have both home and distantsignals. If an
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
