Building an upper floor on an outdoor shed.?

Question

I have an outdoor shed that has a high pitched roof that will allow an upper floor to be added. The pitching starts at 10 feet. To lay a floor down, what size crossbars should I lay down left to right so that I can place plywood on top of this that will provide good stability for support. The floor will contain boxes and overflow items, but not heavy items such as machinary.

Are 2 X 4 beams heavy enough, and if so, how far apart should they be? I assume 3/4 inch plywood is acceptable as the floor on top of the plywood.

Thanks

Answer 1

2x4 beams wont cut it 6x8 yes do your self a favor go talk to some local contractors pick there brains then your building inspector if you build something in most us states and the building inspector finds out that you added stuff the is not up to code he could make you tear it out by law