I am building a 12x16 shed on skids, and had a question about the spacing of
skids. I have leveled the ground (clay and rock), and will have 4"x8"x16"
solid cinder blocks partially buried, for the skids to sit on (4 to 6 each
side) to keep them out of direct ground contact. I plan to use 2 (two) 16'
skids, either 4x6 or 6x6 treated wood, with 12' 2x6 treated joists, across
the top of the skids, spaced 16" on center. A plywood floor will be on top
of the joists. I inspected some prefab sheds made by the Leonard company
which use a similar arrangement. The Leonard sheds have the skids 6' apart,
but I think 10' apart would be more stable.
1. How far apart should the skids be? 6', 8', 10', or does it matter?
2. If I use a 10' span, would I need to use 2x8 joists, or 2x6 joists more
closely spaced for example 12" on center?
3. Are two skids a good idea, or should I use 3 skids and if so why? and
how should they be spaced? Which would be easier to keep level, 2 or 3
Thanks for your assistance.