Evaluating and Inspecting the Strength of Concrete: Rebar Stirrup Spacing and Other Factors

When it comes to the initial planning and design of structures made of concrete, rebar stirrup or tie spacing is one of the main factors that can be adjusted and tested to evaluate its effects on the amount of shear load a reinforced a concrete beam can withstand.

Using specific types of stirrups for web reinforcement as a baseline, designers can accurately calculate the acceptable distribution of stirrup spacing over the length of a concrete beam.

Concrete Rebar Stirrup Spacing

Stirrup spacing is also an important element of post-construction inspection of in-place reinforcing bars. Stirrup and tie spacings can be verified both visually and by measurement, as required. Similarly, rebar inspections also include visual examinations of layout pattern, bar diameters and shape and measurements of bar lengths as well as bar spacings and embedments, among other factors.

For beams and columns made of concrete, rebar stirrup spacing tolerance specifications are in fact quite flexible, allowing for a deviation from the specified location of the stirrup equal to the smallest dimension of the member divided by 12. So, for example, in an 18-inch square beam or column, stirrup placement could vary from the specified location by 1.5 inches.

For more on stirrup spacing and rebar in general, contact one of White Cap's nationwide service representatives.

More on Rebar

Back to Articles