The is a comprehensive guide by the Portland Cement Association (PCA) designed to help engineers, architects, and designers apply the latest building code requirements for structural concrete. Core Purpose and Value
One of the most noteworthy changes in ACI 318-19 (and thus heavily annotated in the PCA Notes) is the . For decades, punching shear capacity did not penalize thicker slabs, even though tests showed a reduction. The 2019 code introduces a factor λ_s = min(0.5 + d/20, 1.0) for slabs thicker than 10 inches. The PCA Notes provides worked comparisons: a 24" thick mat foundation loses ~25% of its nominal shear capacity under the new rules. pca notes on aci 31819
To appreciate the latest PCA Notes, one must understand the seismic shift that occurred in ACI 318-19. The PCA Notes on ACI 318-19 fully incorporate these changes, which include: PCA Notes on ACI 318-19 The is a