The standard foundation for all Kanga structures is a 2×6 treated lumber floor joist panel that rest on 4×4 treated lumber skids. The skids are set on concrete patio stones that are leveled at the ...

The easy way to check that your base 2x6's are square is to measure corner ... the underside of the frame and use that to rest your floor joist on as you position it into place and secure it.