That being said, here's some general information about Autodesk Revit Structure 2012:

Autodesk Revit Structure 2012 is available in both 32-bit and 64-bit versions. The 64-bit version is recommended for larger projects and more complex models.

The ISO file for Autodesk Revit Structure 2012 can be downloaded from various sources, but be cautious when downloading from third-party websites, as they may contain malware or other issues.

If you've purchased a legitimate license, you can activate it using the Autodesk Activation Wizard.

Autodesk Revit Structure 2012 is a building information modeling (BIM) software specifically designed for structural engineers and construction professionals. It's part of the Autodesk Revit series, which also includes Revit Architecture and Revit MEP.

Again, I want to emphasize that seeking or using cracked software is not recommended. Autodesk provides various licensing options, including trials, subscriptions, and perpetual licenses.