Corrugated Metal and Wood Raised Bed. This handsome raised bed is made from a combination of wood and metal to achieve a new look in raised bed gardening. You get the warmth of wood with the sturdiness of metal. The long, narrow shape fits in tight spaces and makes a nice addition to the landscape. The bed is 15-3/4" deep so you can grow almost anything. Patented Swift-Lok post and cap assembly makes set-up easy.