<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2008) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> A fire pit or a fire hole can vary from a pit dug in the ground to an elaborate gas burning structure of stone, brick, and metal . The common feature of fire pits is that they are designed to contain fire and prevent it from spreading . </P> <P> Pre-made fire pits are the most common form of fire pits and can be purchased from a store . These are commonly made of pre cast concrete or metal and / or a combination of metal table and stone . They are usually natural gas, propane (LP) or bio ethanol . Wood burning fire pits made of metal are also quite common but under increasing scrutiny due to fire bans and air particulate emissions . Natural gas and propane burners in these sort of pre fabricated vessels are certified under ANSI (American), CSA (Canadian) and CE (European) standards . Unregulated and uncertified fire pit burners are increasingly being scrutinized by regulatory authorities and being denied permits . Fire pits have recommended clearance to combustibles and require at least 5 feet above the flame and 16" circumference from the exterior perimeter of the vessel . </P>

What is the point of a fire pit