My First house in the high woods of RI was originally a 2 room hunting cabin with a fireplace in the house that was open on 2 sides (Kitchen - livening room) Out in the back was a fire pit shaped like yours, but made from round field stone, it did have steel studs sticking out inside the fire area. I had a cooking grid made that resembles yours. One time when I lit the wood to cook, a huge black snake came out of the chimney, scare the liveing hell out of me.we did have some good cooks out there..
Charm-Glo Gasser, Generic Grill,
State Park Charcoal Grill.
UDS (Under Construction)