# Combinations \[TB] Groups the objects used to turn staged-construction FEA results into AASHTO design and load-rating combinations. Use Result Extraction (From Stages) to prepare unfactored result cases from the analysis, then the Design Load Combinations subgroup to define limit states, load combination tables, and load rating combination tables for the truss bridge. --- # 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/combinations-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.