the idea taken from the-brick-house. it wont have a 90 degree elbow going up to mount to the bottom of the shelf. it'll have a 3-way off of the horizontal pipe and have a base flange to mount onto a cleat on the wall. so then the shelf will rest on the 3-way.
ill be getting 10 foot sections of this. 1/2" black pipe from the home depot. after i make cuts, ill have to re-thread the end so it'll fit into the 3-way.
heres the base flange that will be mounted to the floor, cleat on the wall, and the bottom of the countertop.
ill have to get a ton of these. it'll look like tube city.