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| Re: Tuscarora Almanac for September 24 (1487683) | |||
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Re: Tuscarora Almanac for September 24 |
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Posted by randyo on Tue Sep 25 15:54:38 2018, in response to Re: Tuscarora Almanac for September 24, posted by W.B. on Mon Sep 24 18:19:24 2018. Type I is also in ballast as opposed to the concrete roadbed if Type II. Certain parts of the non dual contract potions of the IRT and the ballasted portions of the BMT have been done in a modified Type II in which every 5th tie (usually the 3rd rail support tie) is a full tie. The Philly Broad St is done this way. The original Type II as found on the dual contract portions of the IRT and BMT had the ties bolted into the concrete. The IND and newer potions of the BMT That have the Type II have no bolts as it was felt that the concrete held the ties sufficiently in place. On heavy curves, not only are the ties bolted, but in some places the modified type is used. I have noticed recently that on the modified Type II installations there is a short section of rebar through the ties to hold them in place more firmly. |
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