Designers are encouraged to conduct adequate site investigations, including probe holes at every pile group location to detect potential voids or cavities.

If termination criteria are met but the pile is significantly shorter than the design depth, the designer must assess if the shallower depth is acceptable. 4. Quality Control and Safety

Rigs must undergo a regular maintenance regime with daily, monthly, and yearly checklists to ensure they remain in peak condition. 2. Installation Procedures and Sequence

Current standards emphasize performance-based design where designers review instrumented Ultimate Load Test (ULT) results to verify design parameters.

Typical allowable pile head settlements are 15 mm at 1.5 times the working load and 25 mm at 2.0 times the working load.