By magaly basler. fire pits design. Published at Friday, November 10th, 2017 - 10:24:15 AM.
A fire pit is the most basic, but also the most attractive, type of garden heater and it can be built very simply with a limited amount of DIY skill. What is a fire pit? In its simplest form, a fire pit is nothing more than a hole in the ground into which wood or coal can be placed and ignited. Most fire pits are however more involved than this and their design takes account of aesthetics and a more permanent structure. Generally some form of seating or benching, along with a hard landscaped area, are also part of most fire pit projects.
FUEL: Given the right circumstances, most substances will burn or combine with oxygen in combustion, a chemical process that liberates heat. (Remember that fire is the heat and light resulting from combustion.) However, the temperature at which things will burn in fire pits, called the ignition point or kindling point, varies according to the substance. For example, the kindling point of film, nitrocellulose, is only 279 degrees Fahrenheit - not recommended for use in fire pits. For wool it is 401 degrees Fahrenheit - obviously making fire pits hard to light, and for newsprint 446 degrees Fahrenheit - perfect for fire pits. What Fuel should I use in my Fire Pit? Wood or charcoal can be used in most fire pits. Some fire pits run on gas, a great alternative. See Artistic Fire Pits for converting your fire pit to gas.
Simple and inexpensive wood burning fire pits can be built in the ground using the now classic method found in campsites and parks today. It’s as easy as 123.1-Dig a hole in the ground. 2-Add gravel and sand for drainage and and to provide a level base. 3-Line it with a metal ring to help contain the flames and focus the heat. Some local authorities only allow fire pit’s that are raised up off the ground, so please check first!! Root fires are a concern so don’t forgo the gravel and sand layer. Some local authorities insist on a base of 25cm if the fire pit is not sitting directly upon a rock outcrop! If you have decided to burn gas then you can either run gas lines to the fire pit or incorporate a propane tank into the design, preferably concealed. We strongly suggest using a certified technician when connecting natural gas or propane to any fire feature. Gas fire pit kits come in all shapes and sizes. You can buy burner kit to incorporate into your design or an entire structure that comes ready for you to apply your finish of choice.
In describing the basic essentials for fire, many speak of the "fire tetrahedron." In other words, besides the original "fire triangle" of fuel, heat and oxygen, they add the fourth essential of chemical reaction. Fire pits use all four! It is necessary for us to understand the part each of these plays in producing fire so that we can put it to use in either lighting our fire pit and preventing or extinguishing unwanted fires. For example, to put out a grease fire on the stove, turn off the stove (removing the heat) and cover with a lid (removing the oxygen that feeds the fire). This will also benefit those contemplating buying a fire pit, helping them to decide which fire pits are best for them. So to get a better idea of what causes fire in your fire pit, let’s take a look at these four basic elements.
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