Which of the following is a structural BIM software?

The choice identified as correct, AutoCAD, is widely recognized as structural BIM software due to its comprehensive capabilities in drafting and designing complex structures. While primarily a 2D drafting tool, AutoCAD does include features that allow for 3D modeling, enabling structural engineers and architects to create detailed building designs, analyze structural components, and integrate them into a broader BIM workflow.

AutoCAD serves a foundational role in many BIM applications, facilitating the design documentation needed for structural projects. Its versatility allows users to work with not just structural elements but also various other components across engineering disciplines.

For clarity regarding other options: HydraCAD is specialized for piping and plumbing designs, making it more suited for HVAC and plumbing systems. Revit MEP is tailored specifically for mechanical, electrical, and plumbing (MEP) engineering rather than structural engineering, and Trimble Pipe / Duct Designer 3D focuses on mechanical systems like ductwork and piping but does not fall under the structural category.