CFI's Driven Pile Academy: Hosted by the PDCA

Why We Test For Capacity ?

Safety

Economics

ASD LRFD pre 2007 after 2007

φ

AASHTO: F.S. SLT (≥1) + DLT (≥2 and ≥2%) 1.90

0.80 0.75 0.75 0.65 0.50 0.40

SLT (≥1)

2.00

DLT (100%)

- - -

DLT (≥2 and ≥2%)

2.25 2.75

Wave Equation Analysis

FHWA mod. Gates Formula 3.50

With More Testing

Pier suddenly dropped 11 ft

Reduced number of piles Shorter pile lengths Reduced risk

= less $