During the past four years, the Department of Civil Engineering, San Jose State College, San Jose, California, has assisted in an extensive research and development program for the Ben C. Gerwick Company, Sand Francisco, California, in the development of mass transit and main line railroad prestress concrete ties.
The program included the following:
Rail seat and tie center static loading of the RT-7 tie.
Repeated load tests on the rail seat area.
Repeated load test on a rail fastener system.
Field investigation of the concrete ties, fasteners, and rail in service.
This paper present an account of the methods, techniques and equipment utilized in the laboratory and field testing program. Also included are the results of the tie and fastening system investigation.