21_HWKTTE 4004c - 11 set-check is recommended. The new...

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11 set-check is recommended. The new practice recommends the set-check to be performed at approximately 10 inches above the cut-off elevation. Another important difference is related to the bearing formulas. In the old specifications, the FDOT recommend the use of bearing formulas to determine the pile bearing capacity for piles made out of timber, concrete, composite concrete-steel and steel. Then, from 1994 to date the specifications limited the use of bearing formulas to timber piles driven with power hammers only. Methods to Determine Pile Capacity It was noted that in the old specifications there was not any requirement for using Wave Equation programs to determine the pile capacity. The same observation applies to the use of dynamic testing as a method to determine the pile capacity. Prior to 1994, the FDOT recommended the use of static load test to determine the pile capacity of any pile that did not reach the required resistance at the end of drive or as directed by the engineer. The new specifications recommend the use of Pile Driving Analyzer (PDA), the Wave
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21_HWKTTE 4004c - 11 set-check is recommended. The new...

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