Step 1 - Corner Rail Support

• 4 pieces 10' 2x4s
• 1 pieces 8' 2x4

To start, cut four pieces of 2x4 to the length you want your box to be (well, it will be 1.5" longer if you put plywood on the side), just make sure you can find 10' rails before you start building a 10' box. Take a ruler and mark the 2x4's every 1.5 feet or so, I spaced it out slightly more so that I would have seven marks total (including the ends).

Put two screws at each mark into one of the pieces (this step just for convenience).

Next take an 8' 2x4 and cut seven pieces that are 8.25" long, screw them into one of the 10' 2x4s. Cutting the studs to 8.25" will make your box 1' tall, 3" of height comes from two 2x4s (which are actually 1.5" by 3.5"), then the final 3/4" from the top plywood.

Screw one of the 10' 2x4's onto the other side, make sure to keep things as square as possible.

Go on to Step 2: The Pipe Rail Side