Examinations in situ of selected older lengths of concrete sleeper assemblies complementary to report no. TM CES 14 (TM-CES-016)

Reports have been made during the last few years on the performance of F27A and F27B sleepers, the service periods involved being from 1 to 3 years. These sleepers have been developed from the standard F27, with augumented prestress at the top of the rail seat section. This was done...