I used 2X12s for the 72 inch sides, 2X12 for the 55 inch base, 2X12 for the 55 inch top top, 1 1/4 round sticks for the rows, and braced it with 2 corner braces inside each corner. Used a spade boring bit to make the holes 7/8 inch deep, then laid the other side on top and drilled a small hole to spot the hole locations for the opposite side and bored those out. Did a test fit, then painted the pieces with satin black. 9 inches between rows, and had the sticks spread as far apart as I could between the sticks on 1 row. I wanted to make the base from 16X2, but they didn't have it.