Laboratory Testing to Address the Potential for Damaging Hydraulic Pressure in the Concrete Tie Rail Seat Zeman, J.C., J.R. Edwards, D.A. Lange and C.P.L. Barkan. 2011. Laboratory Testing to Address the Potential for Damaging Hydraulic Pressure in the Concrete Tie Rail Seat. In: Proceedings of the Transportation Research Board 90th Annual Meeting. Washington, DC. Files Laboratory Testing to Address the Potential for Damaging Hydraulic Pressure in the Concrete Tie Rail Seat - Full Text (PDF) Categories Infrastructure