For connecting the greenhouse to the ground there are 3 options: T-shape metal feet you dig down a foot or so and back fill, or pour a concrete pad and bolt the greenhouse frame to it, or build a wooden base and secure the frame to that. I didn’t trust the metal legs to hold up in our climate, and pouring a concrete pad is like getting a tattoo for your yard. So a wood base it was. Anyway, I wanted to practice some timber frame joinery. Metal straps would work fine. I just like the aesthetics of mortise and tennon joints..
Step 1: Digging out the old raised beds. Hated to do it but they had to go.
Step 2. Leveling the pad with compacting gravel. A wheel barrow at a time. You spread out a layer about 6 inches thick and tamp it down. You can rent a tamping machine but it’s faster and cheaper to use a hand tamper for a project this size.