Shear design provisions in ACI 318 underwent significant calibration in the 2019 edition. The PCA Notes provide updated tables and design examples that walk through the calculation of shear capacity ($V_c$) and the required shear reinforcement ($V_s$), ensuring engineers don't make errors using outdated formulas.
Many university libraries subscribe to the ACI Digital Library. If you are a student or faculty member, log in via your institution’s proxy server. While the library may not include the PCA Notes directly, it often includes ACI 318-19 itself and many design guides that serve a similar purpose. Pca Notes On Aci 318-19 Pdf Free Download