Shorty,
1/4” steel plate in air will cool quickly (and heat quickly).
Now, the sand underneath, if heated, will have slow cool down, and you may burn your feet if you step on hot sand next day.
Basic thermodynamics, and common sense (sometimes in short supply).
These “low-smoke” fire pits work by promoting lots of air flow, so they burn up wood fast.
My backyard fire pit is a rock ring, Old school, no trendy affectations here. It may be a little smokier, but the materials were basically free free
(Locally mined on my property), it is “caveman cool,” and my family and friends have enough brains to sit up wind or cross gradient, so don’t
need “smokeless” sought by peeps without sense to move out of way of smoke.
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