ACI 445R-99

Truss model approaches and related theories for design of reinforced concrete members to resist shear are presented in this document. Realistic models for design of deep beams, corbels, and other nonstandard structural members are illustrated and background theories and the complementary nature of a number of different approaches for the shear design of structural concrete are discussed. These relatively new procedures provide a unified, intelligible, and safe design framework for proportioning structural concrete for combined load effects.