ADVOCACY
1810.3.2.6, affectionally referred to as The Table. We made four different proposals so that if one failed the others could pass. We passed
all four.
Concrete in compression: Raymond corrugated cans could use 0.4 f ”c but pipe piles were only allowed 0.33 f ’c. Pipe piles now have
0.4 also.
Steel in compression and tension: The existing limit for pipe and H-piles was 0.35 Fy < 16,000 psi, which is fine for a yield stress
of 45,700. The new limit is 0.35 Fy < 24,000 psi, which correlates with a yield of 68,500. This helps match the stronger steel strengths
now available.
Non-prestressed reinforcement in tension: For situations that do not include wind or seismic loads, the stresses were 0.5 Fy <24,000
psi and are now 0.5 Fy < 30,000 psi. For wind or seismic loads, the allowable stresses are now 0.5 Fy < 40,000 psi. This more closely aligns
with ACI 318.
Stresses in concrete: A footnote was revised to clarify the correct stress area for prestressed and pipe piles.
112 | ISSUE 4 2020 www.piledrivers.org
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