A single-storey car park buried in the ground with curtains on three sides

[yunussacikk]

hello I have a single storey car park buried in the ground with curtains on 3 sides. I cannot analyze this solid by choosing rigid, what should I do in these cases?

 

[sahinsukru]

hi, I have a single-storey car park buried in the ground with curtains on 3 sides. I cannot analyze this floor by selecting it as rigid. Since it is a single storey, there is no need to define a rigid storey.