Free plans, diagrams, and step-by-step instructions for building a simple 4-by-6-foot outdoor shed. Get those garden tools organized! In This Article: Storage Shed Design Plan Modifications Building ...

I want them to be waterproof, but I can’t imagine pouring a concrete slab myself. ... You use treated- lumber floor joists that are raised off the soil at least 6 inches.

This was reported by construction industry quarters to the Concrete Ventures Group Inc. (CVGI) which manufactures and markets the tested C-Joist brand of the floor and roof system.