Evaluation of Existing Loading Environment in North America for Improved Concrete Sleepers and Fastening Systems Van Dyk, B.J., C.T. Rapp, M.S. Dersch, J.R. Edwards, C.J. Ruppert, Jr. and C.P.L. Barkan. 2013. Evaluation of Existing Loading Environment in North America for Improved Concrete Sleepers and Fastening Systems. In: Proceedings of the 10th World Congress on Railway Research. Sydney, Australia. Files Evaluation of Existing Loading Environment in North America for Improved Concrete Sleepers and Fastening Systems - Full Text (PDF) Categories Infrastructure