The fire could loose a shard of stone and then op could lose an eye.

Unless I'm misunderstanding, root fire is usually an issue for big vines & tree stumps and the like. Monoculture turf roots like that would probably decompose pretty quickly after the first fire kills the grass (assuming they properly douse the fire)

The risks are very tiny with sod. I've never seen a grass fire travel underground and as a retired firefighter, I've seen and fought a few 1000 acres of grass fires. Nor was it was even mentioned as a possible training scenario. Now it is possible for a forest fire to burn down into the ground because of the roots that trees have.

We've had about 40,000 acres of forest fire up here in the Arrow Head region of northern Minnesota this past summer. Only one fire is having issues with underground burning. And there was a lot of fire burden from standing dead trees and dead falls. Which are the cause of the under ground fires. They estimate by January of February this winter the fires will burn out.

The only thing I don't like about fire rings is needing to mow around them.....

Everything will change when the fire benders attack tho

I hope they are fire rated.

cause spalling is a real thing that can cause serious harm.

Tha's needs more cowbell.

And a concrete lid so Sadako can’t escape!

Primary goal is low marshmallo fires so I didnt add airflow. I can always space it out an inch later if need be.