Thank you for the answer. I made as in your first answer. Now it looks better. I made an assembly, I will attach picture later. I need to test rigid links as well.
I can not ignore peaks, because I need Excel graphs for different height and length of the profiles. I am going to make sensitivity study
and profile lenght is varying from 1000 to 6000mm. And even 12 000mm profile lengths.
Beam is one what I need to consider.
I noticed one rather strange thing. When I change the profile length from 1000-5999mm, I can use shell for meshing. But when the length is 6000 or more, Creo automatically use solid surfaces for meshing???