Reuse old bridge wood for home or landscaping projects such as constructing raised garden beds. Not only does this alternative to purchasing lumber from a store save excess costs, it reduces the amount of waste taking up space in landfills and also gives your beds a rustic appearance that blends with the natural setting found outdoors. Raised beds increase the quantity of a crop and prevent problems, including poorly draining soil, pests and weeds. Creating a raised bed vegetable garden from old bridge wood is a straightforward project that does not require any particular woodworking skill or prior experience.
Measure and cut 4-by-4 lumber into four 18-inch lengths for the corner posts of the raised bed. Cut with a handsaw and sharpen the lower side of each post slightly to form points.
Measure and cut four lengths of 6-inch-wide bridge wood in your desired dimensions to form the two long sides of the rectangular raised bed. Cut with a handsaw and place aside. Also from the bridge wood cut four lengths of identical width for the short sides.
Assemble the raised garden bed by joining the short sides of the raise garden bed to the corner posts first. Place one of the 18-inch-long corner posts on a flat and even surface, and lay a short length of bridge wood over its top flat corner. Align the piece so its top is level with the top of the post, then drill into place with two wood screws spaced evenly apart.
Place the second identical board directly below the previous one, and drill two wood screws in its corner to attach it to the post below, thus creating a 12-inch-high wall. Place the second 18-inch-long post below the opposite sides of both the wood lengths. Drill two wood screws through each corner of the wood boards to secure them to the post.
Repeat the procedure to assemble the other short side.
Place one of the assembled short sides on the ground so that the sharp edge of the corner posts faces upward. Hold a long length of bridge wood against a corner post and drill in place with two to three wood screws.
Place another long board directly above the lower one and drill wood screws to its corner to attach it to the same wooden post. The formed L-shaped structure will now stand on its own in this upside-down position.
Place the second assembled short side against the corner of these long boards and secure with wood screws. Attach the two remaining long sides to the corner posts to complete the rectangular bed.
Turn the bed over and insert the pointed ends of the corner posts into the ground by pounding each with a mallet or sledgehammer.