The ACI 318 is a must-have standard for all concrete design, construction, inspection, repair, and research professionals. The ACI 318-05 contains the latest code requirements for concrete building design and construction. The companion commentary is a side-by-side column format to match the corresponding code requirements. The commentary provides some of the considerations of the committee in developing code provisions. This edition of the ACI Building Code is deemed to satisfy the International Organization for Standardization (ISO) 19338, Performance Assessment Requirements for Design Standards on Structural Concrete.