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| Fire rating
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Rating system that shows the fire resistance of a material or system as tested by a recognized laboratory against applicable ASTM standards. For instance, one 5/8 inch thick type X gypsum drywall sheet installed on each side of a wood stud will give a wall a one hour rating, while a double thickness will give a two hour rating. |
| Fire resistance
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The property of a material or assembly, to withstand fire or give protection from it. |
| Fire resistant panels
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Panels made of type x gypsum wallboard. Fiberglass and other heat-resistant, noncombustible materials are added to its core to increase the fire resistance of the wallboard. |
| Fire resistive
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Materials, which are able to withstand exposure to flame of a specified intensity or for a specified time. Fire resistive materials are used in interior finishes, such as wood paneling, wallboard, acoustical tile, furniture and carpeting fabrics. |
| Fire retardant
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A chemical or preparation of chemicals used to reduce flammability or to retard spread of a fire over the surface. |
| Fire retardant paint
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Paint with nitrogen compounds that form insulating gas bubbles when exposed to heat so that the heat transfer is slowed by the trapped gas, thus protecting the painted surface. |
| Fire retardant treatment
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Saturation of material or coating of surfaces with fire retardant chemicals. |
| Fire stop
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Wooden block built between the wall studs or joists, within covered walls, which closes off the passage of air, thereby limiting the spread of fire. |
| Fire taping
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Method of taping used for fireproofing rather than for appearance. When a finish coat of joint compound is not needed, the joints of the wallboard are taped to avoid a possible path for a fire. |
| Fire valves (or fire dampers)
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Components which are installed in an air distribution system between two fire separating compartments and are designed to prevent propagation of fire and/or smoke. Generally are kept open by mechanical restraint, whose effect is canceled under specific conditions. The valve is then closed automatically. |
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