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Fire-retardant materials should not be confused with fire-resistant materials. A fire resistant material is one which is designed to resist burning and withstand heat. An example of a fire-resistant material is one which is used in bunker gear worn by firefighters to protect them from the flames of a burning building.
EN 16034 is a set of European standards which specify the technical performance characteristics for fire resistant and smoke control products, such as fire doors. Compliance with this standard requires to fulfill the requirements of the Construction Product Regulation [1] for construction products (short CPR).
Fire doors are made from a range of different materials such as timber or steel. Despite not being fire resistant, timber is used as it has a very predictable char rate, depending on the density and the moisture content timber generally has a char rate of 0.5mm per minute for hardwood and 0.7mm per minute for softwood. [5]
The primary functions of a fireback are to protect the wall at the back of the fireplace and radiate heat from the fire into the room. The protection was especially important where the wall was constructed of insubstantial material such as daub (a mud and straw mixture coating interwoven wooden wattles), brick or soft stone.
Nomex is a trademarked term for an inherently flame-resistant fabric with meta-aramid chemistry widely used for industrial applications and fire protection equipment. It was developed in the early 1960s by DuPont and first marketed in 1967.
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