I agree with biowheel that chrome wire shelving is a better solution than building your own shelves. Sam's Club sells similar chrome wire shelving. The steel shelving is vastly stronger than anything you could make out of wood or plastic and you can set up the chrome shelves in about an hour. I usually leave out one, two, or three of the six provided shelves to make more room for the plants and lights. You can adjust the shelves anywhere in one-inch increments. Two of the wheels have brakes that you can set.

MM