Synthetic railroad crosstie

摘要: A railroad crosstie is constructed from at least two individually distinct rail support blocks interconnected by a web system which fastened to the and comprises one self-supporting rigid sheet member adapted be buried in roadway ballast when tie place. The are selected secure rails conventional manner, interconnecting holds relative position roadbed. advantageously disposed or provided with means such as horizontal longitudinal corrugations interact mechanically particles of standard ballast, whereby resists being withdrawn Exemplary ties have trapezoidal cellular high density polyethylene side panels longitudinally corrugated steel sheet, lighter than wood but comparable load properties durability superior wood.