If the curve shows a clear peak: $$Ultimate Bearing Capacity (q_u) = \frac\textUltimate Load\textPlate Area$$
A standard PLT report must include:
| Load (kN) | Settlement (mm) | Time of Reading | | --- | --- | --- | | 10 | 0.5 | 10:00 | | 20 | 1.2 | 10:15 | | 30 | 2.5 | 10:30 | | ... | ... | ... | plate load test report xls work