It's no more then taking 2 far more solid straight 4 x 4s, 4 x 6s, 6 x 6s or 8 x 8s Pressure-Treated lumber and placing them in a row and building your garden storage floor frame upon one.
Is it the buyer's responsibility to provide plans? http://Connorfloors.com/__media__/js/netsoltrademark.php?d=www.Tsai.us%2F__media__%2Fjs%2Fnetsoltrademark.php%3Fd%3DLaunchhappy.co