I needed my grandson and his fiancé to help me build it. Bought the 5 shelf but there were only 12 of the gray brackets supports for the beams. I could only do three shelves with the 12 gray bracket supports and used four safety caps for the top 4th shelf. Without the 4 more gray bracket supports needed, I could not use the fifth shelf. So I had to rethink the height and rethink the look of that shelving unit and leave the fifth shelf in the box with the top four posts and the top four brackets. FYI Five shelf needs at least 16 gray bracket supports for the beams.