Download of Dynamo Extension for Autodesk Advance Steel 1.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software is a product of Autodesk.
We recommend checking the downloaded files with any free antivirus. You can launch this free PC software on Windows 7/8/10/11 64-bit. The following version: 1.0 is the most frequently downloaded one by the program users. Dynamo Extension for Autodesk Advance Steel lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
The Dynamo Extension for Advance Steel allows you to generate complex structures using Advance Steel beams and plates. You can assign materials, beam sections or user attributes from Dynamo to the generated elements in order to minimize the number of steps required for modeling.
You may want to check out more software, such as Autodesk Advance Steel Object Enabler, Creativity Extension for Autodesk 3ds Max Design 2009 32-bit or Autodesk React Structures Tech Preview, which might be similar to Dynamo Extension for Autodesk Advance Steel.