I want to create a warehouse-like structure with two lean-to structures that have 2 floors above. When I create the first floor it is covering the whole structure whereas I want the main structure to be just a space. The structure purely made of metallic material except for the 1m above FFL masonry block work. So, I am also struggling in framing the walls and the floors with metallic trusses and beams to fit the metal sheets. Finally I would love the roof to look like the .jpg sketch which also is a struggle.
I need help and guidance on how:
I can make the roofing look like the one in the image sketch.
Add floors to the lean-to structures only without adding in the main as show in the sketch.
Frame the walls and roof with metallic trusses/beams as in the image (3D Impression)