# Rebars \[TB] 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.openbrim.org/templates/truss-bridge-workflow/properties-tb/rebars-tb.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.