Hello, I just started using the İdecad steel program. I am modeling a wedding hall with a span of 20 meters. I created a steel roof using ipe beam profiles instead of using scissors, but when I connect the beams to each other with steel compositions, I get a plate thickness error after the analysis. For example, thicknesses of 20-30 mm do not save. When I examine the analysis, I see that I should use 90-100 mm plates. I thought I made a mistake in modelling. Then I examined your sample industrial structure project and the results are the same for you. I would be very grateful if you could provide information on this subject. I wish you good work. Doruk Araplılı Civil Engineer