While Autodesk’s official readme file for SP2 listed dozens of fixes, the most significant improvements fell into five categories:
AutoCAD Structural Detailing 2015 and its service packs are considered obsolete. Autodesk discontinued ACD as a separate product after the 2015 version, merging its functionality into Revit and Advance Steel (for steel) and AutoCAD with the "Reinforcement" tools. autocad structural detailing 2015 service pack 2
However, Service Pack 2 remains useful for: While Autodesk’s official readme file for SP2 listed
Once you have successfully installed SP2, follow these best practices to maximize stability: autocad structural detailing 2015 service pack 2