Building An Outside Fire Pit. Fire pits are strictly governed by local building codes. Local ordinances permitting, your fire pit should ideally measure between 36 and 44 inches wide (including the width of the walls) to accommodate multiple people around it while maintaining an intimate setting.

Nevertheless, a gas fire pit—however it is built—becomes an outside focal point. I noticed this summer that the capstones became loose from the pit. Always check with the current fire restrictions in your area.

The pit was built by first making a concrete foundation supported with rebar.

Sourcing guide for outside fire pit: A fire pit project is perfect though, wherever you live with the colder months peeping. Installing a fire pit is a diy project that can be configured for your the diameter of the circle should be slightly larger than the outside dimensions of the fire pit ring you're preparing to build. We suggest a fire pit with an outside diameter between four and six feet, depending on the thickness of the wall of your fire pit.