What are typical shear reinforcement components?

• A. Rebar couplers
• B. Concrete sealers
• C. Stirrups or closed loops
• D. Ties

Answer: (C)

Shear reinforcement is placed to resist diagonal shear forces in reinforced concrete by forming a closed path around the main longitudinal bars. This is typically done with stirrups or closed loops of rebar that wrap around the main reinforcement and are spaced in the shear region. By creating a continuous load path, these components help carry shear stress and prevent diagonal cracking or sudden failure, acting like a small, internal truss within the beam or other member.

Rebar couplers, by contrast, are used to splice bars and connect lengths of reinforcing steel, not to resist shear in the member. Concrete sealers are protective or cosmetic coatings and do not contribute to structural shear capacity. Ties are used to hold the reinforcement in position and provide confinement, but they are not the primary shear-resisting elements in the typical shear region. Therefore, the standard shear reinforcement components are stirrups or closed loops.