Tuesday, February 22, 2011

Railroad Frog

 The train tracks or rails showing the frog (not that animal), or also know as the common crossing. Frog refers to the crossing point of two rails. The frog is designed to ensure the wheel crosses the gap in the rail without dropping into the gap; the wheel and rail profile ensures that the wheel is always supported by at least one rail. This term "frog" is derived from the appearance of the elongated x-shaped assemblage of rails, which resembles the shape of a leaping frog.

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