A Class 1, or Class A, fire rating means that the building material is highly resistant to fire and does not spread flames quickly. In the flame-spread rating test, a score of 0 to 25 constitutes a Class 1 rating. The score is relative and balanced between asbestos cement sheet, with a score of 0, and pure red oak, with a score of 100.Know More
Building materials with a Class 1 fire rating are often man-made or nonorganic substances. The most extreme example is asbestos cement sheet, which is extremely resistant to fire but hazardous to humans in other ways. True AC sheets are banned in many countries, though it is possible to find a safer version that uses cellulose instead of asbestos. Other Class 1 building materials include brick, tile and cement. Some carpets also have a Class 1 fire rating.
In personal dwellings, experts recommend using materials with a Class 1 rating, but it isn't mandatory. In the United States, public buildings such as nursing homes, prisons, schools and hospitals must conform to the highest fire-safety standards and are often required to use Class 1 materials.
Pure wood used straight from the tree has different ratings depending on the type of tree. Some trees have a Class 2, or Class B, fire rating. The wood of most trees has a Class 3, or Class C, rating. Composite materials such as plywood and particle board also fall into the Class 3 category.Learn More
Firefighters generally work to put out a forest fire by creating a fire line in the ground that will stop the fire from continuing its path. Firefighters may also use planes filled with water and chemicals to help put out forest fires.Full Answer >
Most house fires burn at an average of 1,100 degrees Fahrenheit, according to the Livesafe Foundation. This temperature varies according to the source of the fire, the items burned in the fire and many other factors.Full Answer >
There are several theories about why fire engines are red. One theory suggests that fire trucks were first painted red back in the 1800s when fire brigades took so much pride in their trucks that they wanted them to stand out and feature the most regal and expensive color, which at the time was red.Full Answer >
Smoke detectors that sound when smoke is not present may suffer from an electrical problem. The smoke sensor may be at fault as well. Some sound if the battery is low and needs replacement.Full Answer >