My 2x4 storage shelves, altered from Ann Whites plan to accommodate totes, it is 8 ft tall, 48 inches wide has 5 shelves, used 17 8ft 2x4's to complete in about 3 hours. To get the depth I wanted I increased the length of the side supports to 22 inches added to the thickness of the corner pieces making my shelves 24 inches deep. I'm pleased with 1 exception. This was to be my project. Husband offered to help,per normal he took over and I was the "grunt" help.