PITWhat is the maximum size foundation that can be tested with the PIT?
The maximum size for successful PIT testing is usually specified in terms of a maximum Length (L) over Diameter (D) ratio. An L/D ratio of 30 has in the past been mentioned as being the upper limit for the PIT test, since for older electronics and for piles or shafts longer than 30 times their diameter the input is usually depleted by shaft soil resistance so that no clear toe reflection would be observable.