What is a stirrup used for in construction?

A stirrup in construction is primarily used to provide reinforcement in concrete elements, particularly in beams and columns. It is typically a closed loop of reinforcing steel or metal that is designed to hold vertical reinforcing bars in place and to prevent them from moving during the pouring of concrete. This helps to improve the overall tensile strength and structural integrity of the concrete by ensuring that the reinforcement remains effectively positioned within the concrete matrix.

While the other options represent various construction functions, they do not specifically describe the role of a stirrup. For example, the function of holding beams together and anchoring fixtures involves different connection techniques, while guiding electrical wiring pertains to electrical installations rather than structural reinforcement. Hence, the specific role of a stirrup in reinforcing concrete makes this option the most accurate.