What is a Class A material?
Class A rated materials are the only materials that can be specified on external applications and specified attachments on buildings higher than 18 meters. Only materials that are rated A1 or A2 are considered non-combustible materials according to the European Classification (Euroclass) System.
What type of fuel is Class A?
Class A fires are fuelled by solid materials such as plastic, wood, paper, textiles and furniture. Most of these materials are organic in nature. The appropriate extinguishers used to tackle a class A fire include dry powder, water, foam and wet chemical extinguishers.
What is Class A flame spread?
Class A = Flame Spread Index of 25 or less; the best possible rating, awarded to fire-retardant building products, like concrete.
What is Class A Class 1 fire rating?
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. Other Class 1 building materials include brick, tile and cement.
What are Class A fires?
There are four classes of fires: Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.
What is a Class A fire retardant?
Class A fire retardants have a flame spread rating of between zero and 25. These materials are effective against severe fire exposure. These materials are effective against light fire exposure. Class D materials have a flame spread rating of between 201 and 500. Class E materials have a flame spread rating of over 500.
Is class A fire rated?
Class A – Flame-spread 0-25, smoke developed 0-450. Class B – Flame-spread 26-75, smoke developed 0-450. Class C – Flame-spread 76-200, smoke developed 0-450. NFPA 101 primarily applies this classification to interior wall and ceiling finish materials.
Is a Class A fire rating good?
A material rated as Class A would have a lower flame spread, and therefore a better performance rating, than a Class C material. The results of the flame spread test results in a numeric rating. If the numeric value is less than 25, then a Class A flame spread index is assigned.
What is NFPA Class A?
The most stringent rating available for building materials is Class A. Class A materials have an FSR of 0 to 25. The classification system provided by the NFPA allows architects and engineers to select the best materials for fire safety when starting new projects.
What are Class A fire hazards?
Class A—fires involving ordinary combustibles, such as paper, trash, some plastics, wood and cloth. The wrong extinguisher actually may make a fire emergency worse.
Which extinguisher is a class A B and C type?
ABC powder fire extinguishers have a blue label. They are extremely versatile and can be used on class A, class B, class C and electrical fires.