I am preparing plans to build a shed in my back yard and have clear the site that I will be building on. First, regarding the bare ground on which it will be built, do I need to put anything on it such as gravel, etc.? It is sloped a bit but I had planned on using the garden hose on the area to simulate rain to see if it puddles up and to see where the "rain water" flows to. I don't want either a lot of weeds to grow on it nor it to become muddy. Second, I am concerned that the shed have adequate support for the weight of the wood. Short of providing pictures via a scan or in .dwg format, here is what I am proposing: The shed will be 10' x 12' and will sit above ground, probably by 6" or so. I will be using three treated 4x4x12' supports, space 3'-4 apart. Each support will sit on three concrete piers on 3'-6 centers. Upon these 4x4s I will build the 10'x12' base frame of the shed consisting of treated 2x4s with 2x4s on 16" centers. The frame will have 3/4" cdx plywood for a floor. Walls, approx 7'-6 high, will be built using 2x4 (non-treated) and T111 for siding. Trusses will be fabbed from 2x4s and on 16" centers. Roof will consist of either shingles or metal over 5/8 chipboard. Height of the shed at the peak of the roof is 10'-6. I will be adding two windows and will be using a pre-hung 36" wide steel entry door. PLease feel free to comment on any aspect of the shed as this rookie could use all the input I can get before my project starts. I have not begun material purchase yet. Primary concerns are an adequate foundation, no or minimal give to the floor, tips for roofing, and does the 4x4 on pier have to be directly under the walls?With my spacing, I have a 1'-0 cantelever of the floor (see spacing dimensions). Thanks to all that may have input. Thanks!

I've read several posts that suggest a concrete foundation but that's just not what I'm looking for right now. this is a cheap metal shed that I just want to last a few years until I can design and submit plans for a real building. When I do that I'm hoping for an insulated slab with radiant heat for a nice workshop. so I'd just like a bed of gravel for a little bit of drainage and leveling. A friend said two yards but he's not really sure. the stone company is suggesting 2A modified but they sell it by the TON not by the YARD. So does anyone know how much, by weight, of 2A stone I would need for 2" to 3" bed of gravel under a 10x13 shed? thanks in advance.