Write an article based on this "Clamp 1 leg perpendicular against the end of your first side. Drill 4 wood screws through the sides and leg. Clamp your second leg to the opposite side and drill it in place with wood screws. Set your finished piece aside and repeat the process to create your second side. Join a side and end together by drilling your ends through each side. Repeat this process 3 more times to drill your ends into the sides. Fit the 2 L-shaped pieces together like puzzle pieces to make a hollow box."
Place 2 pieces of fence post flat on your work surface with the edges hanging over the side. Line them up by hand so that they lay flat and parallel against one another. Use rubber clamps to hold the pieces in place. Take 1 leg, and hold it underneath the edge of the 2 boards. Move it by hand so that the top and side of the leg are flush against the 90-degree angle at the top of your 2 sides, and clamp it in place. With your pieces clamped in place, hold a 158in (4.1cm) wood screw so that it rests 1in (2.5cm) from the top and side of your fence board, directly on top of the leg. Drill the screw all the way through the side panel and leg to join them. Repeat this process near each corner of you side panel to secure your leg to the side. You now have 1 side of your planter box and 1 leg assembled. Flip your board so that it's facing the opposite direction. Lay your leg underneath the 2 opposite sides, with the same side sticking out underneath your fence panels. Clamp it in place and secure it using your 158in (4.1cm) wood screws. You now have 1 entire side built with 2 legs assembled. Start by laying out your 2 other fence posts on top of your work surface. Move them together so that they're flush and parallel. Secure them to your 2 leg posts using your drill and 158in (4.1cm) wood screws Place each screw 1in (2.5cm) away from each respective corner of a plank. You now have your 2 sides and 4 legs assembled. Place a finished side flat on your work surface with the legs facing up. Hold a shorter length of cedar fence board flush against any corner where a leg and edge of a side meet. Use your nondominant hand to hold the three pieces together while you drill 2 158in (4.1cm) wood screws through each side of your panel where your leg is. Hold each end piece flush against an exterior corner so that the 2 90-degree angles meet. Affix your end boards to the legs by using the same wood screws. Do this on 1 end of each side so that the 2 boards are attached to opposite ends of each side. This will make each side easier to join together. Lay 1 end flat on the ground so that its long side sticks up in the air. Take your other side and lay its long edge on top of the opposite leg. While you're putting the second side down, guide the end that is sticking out in the air on top of the leg on the opposite side. Clamp your 2 L-shaped pieces together with rubber clamps and use 2 158in (4.1cm) wood screws to affix each section of fence board on your end to the leg it's laying on top of. You can lay your planter box on its legs now. You will have a stable and hollow box with no bottom.