# Substructure \[CSB] The substructure of a bridge can be classified into several parts: OpenBrIM offers several different object types for each substructure element, each with distinct parameters for various purposes. For further explanations of each OpenBrIM object, please refer to the relevant section of the documentation. --- # 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/cable-stayed-bridge-workflow/substructure-csb.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.