take it easy, the architectural project and static solution are attached. architecturally, the entrance to the building is 100 cm below the basement ceiling. Despite my hard work, there is no reinforcement in the beams and he wants to solve it with more than one diaphragm. I would really appreciate if you can help. I'm also thinking of switching to ide 8. Take it easy have a good day. bed coefficient: between 1000-2000 (t/m3), ground safety stress: 1.0 kg/cm2 dwg was not accepted. no need anymore.