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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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The use of alternative design approaches that deviate from current ACI 318 slender wall provisions can have potential pitfalls that result in an inadequate slender wall (or tilt-up wall) design. Some of these deviations include substituting alternate equations such as an inappropriate effective moment of inertia or incorrect modulus of rupture into the approved ACI 318 methodology, using a superseded ACI 318 standard, or replacing the approved ACI 318 methodology with an inappropriate finite element model. Some of these deviations can yield particularly poor results when methods only appropriate for service level deflections are used with strength design equations for second-order P-D analysis.
The Collection Online includes all new committee standards and reports released throughout the year. The most recently added include:
CODE-562-21: Assessment, Repair, and Rehabilitation of Existing Concrete Structures - Code and Commentary
PRC-223-21: Shrinkage-Compensating Concrete - Guide
PRC-423.8-21: Corrosion and Repair of Grouted Post-Tensioning Tendon Systems - Report
CODE 350-20: Code Requirements for Environmental Engineering Concrete Structures (350-20) and Commentary (350R-20)
PRC-364.4-21: Determining the Load Capacity of a Structure when Structural Drawings are Unavailable - TechNote
SPEC-522.1-20: Specification for Construction of Pervious Concrete Pavement (SI Units)
SPEC-548.15-20: Specification for Crack Repair by Epoxy Injection (SI Units)
PRC-377-21: Integrity and Collapse Resistance of Structural Concrete Floor Systems - Report
CODE-350.3-20: Code Requirements for Seismic Analysis and Design of Liquid-Containing Concrete Structures (350.3-20) and Commentary
PRC-350.2-21: Hazardous Material Containment in Concrete Structures—Report
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