1. The drivability prediction pile will be driven during the GI 2002 demonstration event.
2. The pile will be driven with an APED-8-32 diesel hammer. The helmet has a weight of 1.24 kips. The hammer cushion is made of MC901 with an area of 71 sq. inches, a thickness of 2 inches and a coefficient of restitution of 0.80.
3. The winner will be selected as defined by the procedure that follows.
4. The pile will be a closed-end, 12-3/4 inch diameter steel pipe with a 1/4 inch wall thickness.
5. The pile will be 50 feet long and will be driven to a penetration of 45 feet below the ground surface.
6. The driving resistance (blow count) must be predicted for the final 35 feet of penetration.
7. To evaluate the prediction the following procedure must be used:
   
   a. Determine the absolute value of the difference between the measured and the contestant's blow count for each foot beginning at 10 feet penetration and continuing over the full depth of driving.
   b. Sum these values over the range of penetration 10-19 feet, inclusive, and divide the total by 2.0.
   c. Sum these values over the range of penetration 20-29 feet, inclusive, and multiply the total by 1.0.
   d. Sum these values over the range of penetration 30-39 feet, inclusive, and multiply the total by 2.0.
   e. Sum these values over the range of penetration 40-45 feet, inclusive, and multiply the total by 4.0.
   f. Sum the values determined in b. to e.. This value is the Score.
   g. The winner of the contest will be the person with the smallest Score.
   h. In case of a tie, the winner will be the one with the best prediction for the last foot of driving.
   
   
8. A prize of $1000 will be paid to the winner. The winner must be present at the field demo location to claim this prize.