Patent ID: 6374475
Filing Date: 2002-04-23
Classification: B28B,Y10T

Abstract:
The method of manufacturing prestressed reinforced concrete railroad ties comprising the acts of:fabricating an elongated spine resting upon a supporting surface and unattached to said supporting surface; locating terminals at the ends of said spine; attaching reinforcing wire anchors to said terminals; placing railroad tie molds upon said spine; passing reinforcing wires through said molds; attaching said reinforcing wires to said anchors; deriving from stress measuring devices incorporated in at least some of said anchors, data signals representing tensile stresses in corresponding individual ones of said reinforcing wires; transforming the signals into a human-readable form in which said tensile stresses are readable against identifiers which identify the corresponding ones of said reinforcing wires; and preserving said human readable information for presentation to purchasers of the corresponding ones of said railroad ties.