What is the best/safest way to "hang" a 32" 115lb TV on a floating shelf?

Question:Basically, I want to "hang" a 32", 115lb television to get it off the ground, and allow it to be seen from anywhere in the room.

I want to build a 45 dergree shelf... I'm thinking 2"x4"'s screwed into the existing studs, 2"x4" "cross beam", 1/2" plywood "deck", and then maybe chain or cable running from the bottom corners of the shelf up and through the ceiling and into the ceiling joists? I'm pretty confident that this will work, however, just looking to make sure.

Answers:
You can't hang it from the shelf. You can put the shelf under it, but the weight has to be borne from the top. So you'll have to first place the anchors for the TV into the wall, then hang the shelf below. The shelf can help bear the weight, but not all by itself. Otherwise you risk damage to the wall and the TV.