Title: 421.1R-99: Shear Reinforcement for Slabs
Publication: Technical Documents
Appears on pages(s): 15
Keywords: column-slab junction; concrete design; design; moment transfer; prestressed concrete; punching shear; shearheads; shear stresses; shear studs; slabs; two-way floors.
Note: A newer version of this document exists. This document was replaced by 421.1R-08.
Tests have established that punching shear in slabs can be effectively resisted by reinforcement consisting of vertical rods mechanically anchored at top and bottom of slabs. ACI 318 sets out the principles of design for slab shear reinforcement and makes specific reference to stirrups and shear heads. This report reviews other available types and makes recommendations for their design. The application of these recommendations is illustrated through a numerical example.