Hi, sorry for the slow response I didn't see this question come up. Egon Walesch is the designer for this project. He's also in the pro section of this website and will be able to answer your question.

Thanks for your question. The shelves are supported on thin aluminium angle brackets. They appear to float because of the comparative thinness of the shelf brackets compared to the timber. They have also been painted the same colour so that you don't notice them.