2D Portal Frame - Wind Load 1 0 0 1 1 1 1 1 1 2 0 10 1 1 1 1 1 1 3 20 10 1 1 1 1 1 1 4 20 0 1 1 1 1 1 1 1 1 2 1 1 1 2 2 3 1 1 1 3 3 4 1 1 1 MAT 1 200 0.3 0.0001 SECT 1 10 100 500 500 1 1 1 4 1 1 LOAD 1 1.0 2 5.0 0.0 0.0 0.0 0.0 0.0 3 5.0 0.0 0.0 0.0 0.0 0.0 Copy this into a .dat file, run Frame3DD , and you will get nodal displacements and member end forces— what Robot would give you for a linear static case. Final Advice Do not pirate Autodesk Robot. It is legally risky, often filled with malware, and you miss out on updates.

But what if you could perform linear static analysis, buckling checks, and steel frame design without spending a cent?

Download FreeCAD 1.0, go to the FEM workbench, and run the "Beam Bending" tutorial. You will be analyzing steel frames for free by tonight. Disclaimer: Always verify critical structural calculations with licensed professional software. The author is not liable for structural failures resulting from the use of open-source tools.