Well mine will be cobbled together and bolted to the floor along the side of a barn. One of the guys that collects pallets has a whole load of 3'x3' chip board for £1 a sheet, which is what prompted me to get started, that and we're sponging on Sunday!
So I have brackets bolted to floor with 3" uprights screwed to them, 6' apart running in a line along the edge of the barn. 2 Rails will go horizontally, then screw the boards on to get a solid sided race. All creosoted and then black bitumen paint on top edge to seal the chipboard.
Thoughts and suggestions welcome...