So many emails come in asking about the weight capacity of a floating shelf. There is no simple answer, it depends a lot on how well it is attached to the wall.  The shelves we make are very strong, and can hold alot of weight, I recently put about 150lbs on one shelf and it held fine. That doesn’t mean a shelf attached to your wall will hold the same, it might hold twice that much or nothing at all. It depends on a lot of factors, especially the quality of the installation, which has a lot to do with how the wall is constructed. Our floating shelves require professional installation. Your contractor should be able to give you a good idea of what a shelf attached to your wall can hold once he has seen the installation guide video:

http://www.youtube.com/watch?v=2xY7PedIAlQ

customfloatingshelves.com