Install the Trellis Wires
Once the boards are up, you're ready to install the trellis wires. Eyehooks are a fast and inexpensive way to secure the wires (Image 1). Mark where you want each wire to go using a laser level so that the hooks will line up. There'll be seven on each side, starting from the top. The hooks screw into the wood until all of the threads are buried and the neck of the hook is just outside the face of the wood. Once all of the eyehooks are in place, install the trellis support wires (Image 2), starting at the top and working your way down. Thread the wires through the first eye and tie off by wrapping the wire through the loop several times and then twisting it to secure it. Pull the wire to the corresponding hook on the opposite post and tie it off using the same loop and twist technique. Once all of the wires are in place between one side post and middle post, go the other side and repeat the steps.