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Regular white board, from 1 ⁄ 4 to 3 ⁄ 4 inch (6.3 to 19 mm) thickness; Fire-resistant ("Type X"), different thicknesses and multiple layers of wallboard provide increased fire rating based on the time a specific wall assembly can withstand a standardized fire test. Often perlite, vermiculite, and boric acid are added to improve fire ...
A gypsum block is made of gypsum plaster and water. The manufacturing process [1] is automated at production plants where raw gypsum (CaSO 4 ·2H 2 O) is ground and dried, then heated to remove three-quarters of the bound water and thus transformed into calcium sulfate hemihydrate (CaSO 4 ·½H 2 O), also known as gypsum plaster, stucco, calcined gypsum or plaster of Paris.
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.
Fire partitions are not required to extend through concealed spaces if the construction assembly forming the bottom of the concealed space, such as the ceiling, has a fire resistance rating at least equal to or greater than the fire partition. [3] A high challenge fire wall is a wall used to subdivide a building with high fire challenge ...
Homasote was widely used as wall sheeting from the 1940s into the 1970s. Due to the development of more fire-resistant gypsum board, it has decreased in popularity as a wall sheeting. Homasote is found in studio spaces and featured in many art institutions as a wall covering and doubling as a type of cork board.
Also, test results for heat, smoke, and combustion product release from NFPA 286 are suitable for use as input into fire models for performance-based design, whereas results from NFPA 255 are not. [4] Flame spread rating number is not the rate at which the flame actually spreads along the surface and is not an indication of the fire resistance ...
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