About model and data exchange with 3rd party solutions: Revit, Solibri, dRofus, Bluebeam, structural analysis solutions, and IFC, BCF and DXF/DWG-based exchange, etc.
The simplest way is to create a user parameter for the total weight and use the PARAMETERS function to insert the calculated value. This requires GDL editing with a little scripting and will need to be added to each of the parts you are using.
EDIT: I was assuming the function was not already there.
We are on international forum, so we use english.
Be careful to set the 2D appearance off steel profiles to "Detailed" for exact volumes (the difference betwean "Simple" and "Detailed" in Volume is 4%).
I'll never thought to check it out!
It doesn't make much sense, 'cause 2D symbol should effect
only floor plan, not the model...
anyway it is good to know this
great tip