I agree about not burning on a deck. Pieces can fall out, things get tipped, etc. But if you have to,
, you might consider buying one of those galvanized auto trays. They are about 2.5' by 5'. That will give you a crude hearth pad.
I have a good pit in the ground. I raked out about 10 cubic feet of gravel, so there were no fines. Dug a 4.5'x4.5' hole, filled it with the chunks, then put two concrete manhole extension rings (6" high by 2.5' inner diameter) on top. The rings came from the local brick/block store. Finally, I throw an old BBQ grate in the center. The fire gets going and it draws fresh air from below.
The system is much better than the old ring of rocks on the dirt. It burns healthy and completely. The manhole extenders have a nice flat top to rest smore sticks or feet
Finally, I bent a half inch rebar into a U shape and use that to hold a BBQ grate for grilling.
There's nothing like stories around the campfire, and when things get a little slow, go round the corner and get that 8' fir tree saved from last Christmas. Plant it in the middle of the ring. Makes for a good demo on fire safety and warms folks up so well, and so quickly, that they are up moving backward in just a few seconds.

I have a good pit in the ground. I raked out about 10 cubic feet of gravel, so there were no fines. Dug a 4.5'x4.5' hole, filled it with the chunks, then put two concrete manhole extension rings (6" high by 2.5' inner diameter) on top. The rings came from the local brick/block store. Finally, I throw an old BBQ grate in the center. The fire gets going and it draws fresh air from below.
The system is much better than the old ring of rocks on the dirt. It burns healthy and completely. The manhole extenders have a nice flat top to rest smore sticks or feet

Finally, I bent a half inch rebar into a U shape and use that to hold a BBQ grate for grilling.
There's nothing like stories around the campfire, and when things get a little slow, go round the corner and get that 8' fir tree saved from last Christmas. Plant it in the middle of the ring. Makes for a good demo on fire safety and warms folks up so well, and so quickly, that they are up moving backward in just a few seconds.