Do you make your own steel sandwiches? Generally, I-beam and channel steel are welded to make the frame, and the two walls are fixed with pendants. Steel plate is laid on it, and then the interlayer can be used as ordinary floor or brick, and gypsum board is used for the ceiling below. OK ~
The picture below shows a project we did before. The spacing between channel steel 16 and I-beams 10 is 800, and 5mm steel plates are laid for your reference ~