NCEES Geotech # 518. Is that why they took the overburden pressure at el. -20ft. for 2x2 square precast pile. Asking for the Allowable Tensile capacity.
p. 166, Geotechnical Solution 518:
Replace line 6 with the following:
Overburden pressure at el. -20 ft, P 5(120) 30 (115) =2,325 psf...