Investigation of Concrete Sleeper Rail Seat Pressure Distributions for Varying Fastening Systems and Loading Conditions Kernes, R.G., J.R. Edwards, M.S. Dersch, D.A. Lange and C.P.L. Barkan. 2011. Investigation of Concrete Sleeper Rail Seat Pressure Distributions for Varying Fastening Systems and Loading Conditions. In: Proceedings of the 2011 International Heavy Haul Association Conference. Calgary, Canada. Files We're sorry. At this time, we do not have a full text copy of this text available.