I may have misunderstood the question. It looks like the top is two joined boards, one of them about 3 inches wide and the other about 20 inches wide. If you look on the left side of the top, you can barely see what looks like a board line. The joint is very faint, but it is a straight line. So, most of the top is a single board, but it has been joined to a smaller board to complete the top.