I'm designing a picture frame ledge and trying to keep the design as minimalistic as possible. The concept is similar to the following Ikea ledge: Mosslanda.
I came up with the idea of using a keyhole router bit to create a rail to allow for easy hanging. This would require to drill some holes and use the screws to mount the ledge directly.
I'll be using a glued laminated birch board (18mm thick).
Is the structurally sound?
How can I calculate the maximal load of such a thing?