ACI 318-19 Changes to the Concrete Design Standard-Foundations

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Video Summary

The ACI 318.19 code for foundations introduces significant changes, including detailed design provisions for cantilever retaining walls and expansions in deep foundation design. The reorganization from previous codes aimed at consolidating knowledge from various standards like IBC 2015 and ASC 710. Key updates include clarifying the design of cantilever walls as one-way slabs and expanding coverage for precast concrete piles to seismic design categories A through C. The document introduces allowable axial strength design methods compatible with ASC 7 and establishes criteria for confinement in metal cased piles to enhance strength. New minimum compressive strength requirements are set for shallow and deep foundations, with specific guidance on concrete cover, depending on the foundation's placement and exposure conditions. Finally, options for addressing axial forces through 318-19 include allowable axial strength and general strength design, supporting diverse structural conditions.

Keywords

ACI 318.19

cantilever retaining walls

deep foundation design

precast concrete piles

axial strength design