Clarification: Autodesk AutoCAD Structural Detailing 2015 Service Pack 2 was released in 2014, not 2021.
Additionally, Autodesk discontinued AutoCAD Structural Detailing (ASD) after the 2015 release. Therefore, there is no official 2021 version or service pack for this specific software. By 2021, Autodesk had fully transitioned users to Autodesk Advance Steel. autocad structural detailing 2015 service pack 2 2021
Below is an informational article regarding the actual AutoCAD Structural Detailing 2015 Service Pack 2, its contents, and the historical context of the software. AutoCAD Structural Detailing 2015 Service Pack 2 (2021):
ACD_2015_SP2_64bit.exeS.51.0.0SP2 (March 2021)