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Properties of the sleeper samples.
| Sleeper Type | Cross-Sectional Area (mm2) | Length (mm) | Second Moment of Inertia (mm4) | Es (GPa) |
|---|---|---|---|---|
| Timber | 26,450 | 2130 | 29,150,104 | 13.6 |
| Recycled plastic | 28,125 | 2050 | 36,621,094 | 1.0 |
| Synthetic composite | 25,760 | 2120 | 28,389,667 | 8.1 |
| Prestressed concrete | 31,168 | 2130 | 48,699,500 | 38.0 |
