Seismosoft | Earthquake Engineering Solutions

Dear Value :
I have a question , if i have nonsimetrical plan , is it right if i asume constrains as linged one , i found the center of mass for section after that i collect all nodes in one ????is it right

If i get it trully,in sesimostruct it is not possible to define any slab sections.just possible to define as node constrain
to be rigid or simi-rigid.