Construction

This was pretty straight forward. I started out with four 8 foot boards. I cut them all in half to make eight 4 foot boards.
I laid four board out into a box shape and screwed them together using 3" wood screws. I had a box of 25 screws so each corner got three.
After both boxes were put together I marked 1' lines on each side. I'm using small eye bolts to hold the string for my grid. The eye bolts were a pain to screw in. I don't recommend using them but if you do pilot holes are a must. Small nails would have been much faster and easier.