> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/templates/concrete-segmental-bridge-workflow/properties-cbs/rebars-cbs.md).

# Rebars \[CBS]

Rebars can either be imported from a database or manually defined by the user.

## Properties

**Diameter:** Represents the nominal diameter of the steel bar.

**Area:** Represents the cross-sectional area of the steel bar. Tools used for sectional analysis, such as moment capacity, rebar stress computation, moment curvature, and interaction diagram, rely on the cross-sectional area property of rebar instead of its diameter. This is due to the differences between the actual area and the area computed from diameter using the mathematical expression PI\*r².

**Weight:** Represents the weight of the steel bar per unit length.


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