Prestressed concrete railroad tie

Details Prestressed concrete railroad tie Prestressed concrete railroad tie

1990-09-07

1992-08-04

Spar, Robert J.

Railways: surface track

Ties

Nonmetallic

238 83, E01B 334

Patent

active

051351641

ABSTRACT:
A prestressed concrete railroad tie having a tie body made up of two end members for supporting rail attachment parts and a central section extending between and interconnecting the end members and having a transverse cross-section smaller than the transverse section of the end members. Tendons are located in the tie body and extend in opposite directions from a common vertical or horizontal plane in the central section into the end members. At tie ends of the end members the tendons are anchored and are uniformly distributed across the transverse cross-section of the end members. With the tendons centered in the central member, a narrow central member is afforded. The tendons fan outwardly from the common plane in the central section into the end members providing wider or larger end members. This prestressed concrete tie arrangement affords only low changing bending moments in the central section or a positive course of bending moments across the length of the tie.

REFERENCES:
patent: 4150790 (1979-04-01), Potter

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