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

Use 2 X 6's on 16" centers. Use joist hangars (ask your dude at the hardware store).

You must tie this assembly to the support structure (corners and middle of peak). Be careful though - most sheds are designed to just barely hold the roof up with a little bit of snow. If you don't see something substantial to support your deck structure - then build a nice raised patio instead.

Yes, 3/4" decking is pretty standard on 16" centers. You are going to need to make sure the stuff will not get murdered by the weather - use treated lumber and deck sealer.

Answer 2

You didn't give the size of the shed. If the span is greater than 6'
I would go up to a 2X6.
You could use as thin as 1/4 ply. It will help to keep it's form if you use 1/2 but I really think 3/4 is over doing it.
It if is nailed down every 16" the 1/2 won't buckel.

Just to be sure and your done.....1/2 ply over 2X6 joyces.
use deck hangers for the 2X6's

Answer 3

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