This is just an academic project and it is not going to be construct. The professor also forced us to use a two-way slab. Unfortunately, in our university, professors do not advise on projects at all and only want the result.
You left out the main question and only paid attention to the parts...
Hi, I'm designing a steel structure without secondary beams and want to use two-way slab for stories. Should I define roofs as shell-thin or membrane ?
How can I connect the concrete slab to steel beams?