Seismosoft | Earthquake Engineering Solutions

hello,

I'm trying to model a stairs but when I run the eigenvalue analysis in Seismostruct, the stairs is as if it were not connected.
How can I solve it??

Thanks

Dear paanldarzezao,

The stairs are automatically connected by the program at their start (base floor) and their end (top floor). If you think that the stairs should also be connected at their mid height, then you should do it manually by subdividing the column that they are linked to and assigning rigid link.