First thanks for all the post. The supports where every 3'. Yes Chuck the bolts where the weak point on this. We have decided we are going to do a aframe system for the new racks. I am not going to try and explaint it. Will post picks tommrow when i get the first one bulit. This is going to do two things for us. First, it will give us more storage and second, it will allow us to lookat the boards from the end and be able to get to the whole stack.