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Fire pit
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.
==Contemporary types==
Pre-made fire pits are the most common form of fire pits and can be purchased from a store.〔(【引用サイトリンク】url=http://www.serenityhealth.com/firepits.html )〕 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 CO2 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.
Essentially, to make a fire pit only a hole is required in order to safely contain a fire. This can be as simple as digging a hole in the ground, or as complex as hollowing out a brick or rock pillar. A wood burning fire pit be located at least ten feet (three metres) away from structures for safety. Use of a fire pit in adverse conditions should be avoided, and basic fire safety precautions apply.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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