What size rebar do you guys use?
I've been using 3/8", bent into a candy cane, and this year I'm going to be using the same, but with a hook welded to the top (see attached).
I am seeing a lot of people recommend 1/2", though.
Why? This seems like overkill for anything other than *very* large structures. The way that these are being loaded (if you're doing it right, meaning the rebar is in the playa at approximately a 45 degree angle, and is loaded perpendicularly), means that the surface area of the rebar is kindof a moot point.
Your load shouldn't be trying to pull your rebar out of the ground...
Anyway, I'm not really seeing a definitive answer anywhere on the nets, just "use rebar", with some people suggesting 3/8" and some people suggesting 1/4".
What have your experiences been?
 The reason for this over a candy cane is: this gives me a flat surface on the top to pound on with a sledge. Pounding on candy canes ends up translating some of your force into a bending action in the rebar; no bueno.
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