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  20" OCTAGONAL PILES Next smaller size Next larger size
Low prestress level

20 in. solid pile cross section with 9 strands in 15 inch circle
9 strands - fpc = 737

Design Criteria		 20 in. octagonal pile with 9 strands and 6 ksi concrete
f'c = 6 ksi
295 ton axial load 		20 in. octagonal pile with 9 strands and 7 ksi concrete
f'c = 7 ksi
350 ton axial load 		20 in. octagonal pile with 9 strands and 8 ksi concrete
f'c = 8 ksi
404 ton axial load
High prestress level

20 in. solid pile cross section with 16 strands in 15 inch circle
16 strands - fpc = 1256

Design Criteria		 20 in. octagonal pile with 16 strands and 6 ksi concrete
f'c = 6 ksi
272 ton axial load 		20 in. octagonal pile with 16 strands and 7 ksi concrete
f'c = 7 ksi
327 ton axial load 		20 in. octagonal pile with 16 strands and 8 ksi concrete
f'c = 8 ksi
381 ton axial load