What is a fire rating?
Fire evaluation indicates the time for which the material lasts complete combustion during the standard fire test. Fire testing of building materials and components of buildings - such as beams, rays and fire walls - is required in most places by building regulations. Other fire tests for things such as appliances and furniture are voluntary, ordering manufacturers to use in their advertising. The key sales point is examples of products for which fire resistance is a key sales point. This does not necessarily mean that the components of each new structure must be tested. In most cases, the fire evaluation has already been determined by testing the product before it is on the market. In addition, the suppliers answer to be aware of the fire evaluation of the materials they plan to use for the project before they are introduced.
However, information generated by fire evaluation is constantly changing. The interior and exterior towers of the tower worldThey were given a high fire assessment when they were tested against traditional fire sources. Only when an unexpected accelerator was introduced - fuel with stream did the steel beams melt and the structure collapsed. From this debris there was another footnote under the fire ranking scale.
various government entities around the world can hold buildings according to larger or smaller standards, although there is generally a consensus about standard materials. Sometimes the evaluation of fire depends on the circumstances. The evaluation of the fire used for vehicle tunnels is, for example, unusually high, as the consequences of conflagration inside the tunnel would be particularly disastrous.
The National Protective Association promotes improvement of fire protection and safety through testing, but the tests themselves are generally performed by private companies that are not associated with manufacturers or builders. If the building receives unsatisfactory evaluation, suppliers may be obliged to thicken the firewall noBO maybe install a sprinkler system on the ceiling. Most building regulations require one or two -hour fire for walls in commercial buildings.