The most reliable source is the official documentation provided by .
What I can do instead is provide you with a for a technical paper or a quick-start guide based on publicly available information about typical FEM structural analysis software workflows, specifically for Tower 7. You can then expand this using the official uputstvo (PDF manual) that comes with the software or is available from Radimpex. radimpex tower 7 uputstvo
Users can define slabs, beams, columns, and walls with variable cross-sections. The most reliable source is the official documentation