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… (c) above, until May 31, 2024, for crossties other than concrete, each 39 foot segment of: Class 1 track shall have … and 5 track shall have 12 crossties. Crossties, other than concrete, counted to satisfy the requirements of item (c) of … plate through more than 40 percent of a tie’s thickness. Concrete crossties counted to satisfy the requirements of …
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