Fire Pit Plans – Crater

The project does not need to be sprayed, but the appearance will be different if it is poured. Also, the concrete must be GFRC or similarly high-flexural strength concrete formula.

The project's mold is single sided, meaning it only forms the outside of the firepit. Single sided molds are used when the face coat is sprayed into the mold and then the structural backer is hand placed to form an even thickness of concrete. An inner mold will also be necessary if pouring the concrete is the casting method chosen. This adds to the complexity and difficulty, but someone skilled in mold making and pouring complex concrete shapes should be able to successfully cast the project.

We give the overall dimensions of the firepit, so it's possible to estimate the amount of forming materials and GFRC needed to create the firepit. Since experience with GFRC is required (or at least strongly recommended) in order to make the firepit, this is a task well within a fabricator's wheelhouse. However there's no way for us to give a meaningful cost estimate because we don't know what your materials cost or what GFRC mix you're using. The fireburner hardware itself can vary depending on what is used. The firepit is designed around a 12" round or star-shaped burner mounted on a 14" flat stainless steel round plate. We recommend fireburner hardware from HPC Fire Inspired www.hpcfire.com, and they have an extensive list of dealers on their website. Also, many fireglass suppliers have simple online estimating calculators for figuring how much fireglass is required.