Our shelves are made of carbon steel with 3/4" or 1/2" round tubes so they can hold a lot of weight, but just how much depends on how you install it. The weight a bracket can hold depends on two different factors, the first being the backplate of the bracket, and the second being the number of studs that can be hit. cc: Teresa
**If the bracket is attached to solid backing then the weight rating becomes per rod instead of per stud
If you have any questions about your specific project, please let us know and we would be happy to help!