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What is ASTM E 84 Class A?

What is ASTM E 84 Class A?

Both the RealWall™ and LiteBarrier™ containment systems have an ASTM E84 Class A rating, which means they have the lowest fire spread rate and minimal smoke production. When looking at E84 ratings, ensure that the entire system has been both tested and approved.

What is E84 fire rating?

The ASTM E-84 is the standard test method for assessing the surface burning characteristics of building products to explore how the material might contribute to flame spread in the event of a fire. The test reports the Flame Spread index and Smoke Developed index of the tested product.

What is ASTM E84 used for?

ASTM E84, also referred to as “E84”, is the standard test method used to assess the surface burning characteristics of a material used for interior wall and ceiling finishes, with results measured by Flame Spread Index (SFI) and Smoke Developed Index (SDI).

What is a 25 50 fire rating?

A product with a flame spread rating of 25 and a smoke developed rating of 50 is commonly referred to as a 25/50 rated material. ASTM E84 is considered to be a medium-scale test and has been widely adopted for use by the building code authorities to regulate the use of interior finish materials.

What does Class A Class 1 fire rating mean?

A class 1 fire rating is the best fire rating of materials that can be achieved. Class A fire ratings indicate a flame spread rating somewhere between zero and 25. Materials that fall into Class A or Class 1 include things like brick, gypsum wallboard, and fiber cement exterior materials.

What NFPA 255?

NFPA 255: Standard Method of Test of Surface Burning Characteristics of Building Materials.

What is the difference between Class A and Class C fire rating?

Class A fire retardants have a flame spread rating of between zero and 25. These materials are effective against severe fire exposure. Class C fire retardants have a flame spread rating of between 76 and 200. These materials are effective against light fire exposure.

What is flame spread rating of 25?

A numerical reference that measures how fast and far a flame spreads during a 10-minute test. Flame Spread Index of 25 or less; the best possible rating, awarded to fire-retardant building products, like concrete.