Concrete Fire Pit Project - Advice
I am in the initial stage of my fire pit project - planning. After looking at a bunch of designs, I am leaning toward a 3' x 5' (10 in thick) concrete rectangle. I am modeling my fire pit off of a design I saw that was a concrete square pit with a fire bowl inside. I essentially want to do the same but the rectangle pit doesn't really work with a fire bowl. I've been trying to determine if I can find prebuilt fire "boxes" roughly 2' x 4'.
Design: 3' x 5' Rectangle Concrete Pit filled with a base of gravel/sand, Fire "Box" on gravel, Empty space around box filled with gravel/sand until near to the top then filled with nice river stone
Should I go the route of using a fire "box" with concrete rectangle pit, line the pit with fire brick, or scrap the rectangle idea altogether for a different design?
Thanks for the comments and advice.
The only advice I have is that anywhere that will have direct flame contact needs firebrick or some other refractory material, and concrete is not a refractory material, nor is most stone.
Square metal boxes I have seen used for fires tend to twist because of expanding metal. The round ones stay flat.
Make sure you have a way to drain the water out when it rains.
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