Duplex 3, the main beam 3.6 meters, span 4.5 meters wide, steel structure, with 8 channel steel can be, how much space? Or how to make it reasonable? Daily life bears little weight.
How reasonable?. Have to tell you the plane of the room, how to do it, according to some careful design, and then you see the satisfaction of the design results signed and approved. It'll take a lot of time. I can't help you.
Channel steel deformation, it is recommended to cast in place concrete
