Re: beams Your project works in a balanced way thanks to beams, ribs and slabs being solved together. The reason for not saving in the other program may be that it transfers the load directly to the beams where the ribs sit. This admission is an extremely erroneous one. Let your engineer friend convey to the program producer that the system should be solved semi-rigidly. If you analyze your project with the old classical approximate method, it will not save you with ideCAD. The new earthquake regulation gives you the right to dissolve semi-rigid. It's not even a right, it's a necessity. In this project, you do not need to reduce the effective section stiffness, because the beams are forced vertically.