click on the beam from the tool bar, there is curvilinear beam not 1. 2.icon (move the cursor on it, it writes curvilinear beam) check the deflection condition in the beam settings also mark the po1 curtain 25 cm in the geometric control beam height+width of the column it is attached cannot be greater than the sum 30+25=55 more can't enter the p01 curtain as a column, if you make the width 30 cm, if you enter the invisible curtain as a column in the geometric control, it will be a 30*150cm column. If you want to enter as a curtain, you need to enter 30*180 cm.