Flame spread class 1, 2, 3 materials are described as what?

Flame spread class 1, 2, 3 materials are described as what?

• A. Easily combustible
• B. Noncombustible
• C. Fire resistant
• D. Moderately combustible

Answer: (A)

Flame spread ratings show how quickly a material will ignite and how fast flames can travel across its surface. Materials labeled as flame spread class 1, 2, or 3 are described as easily combustible because they ignite readily and allow flame to spread with little resistance. This is in contrast to noncombustible or fire-resistant materials, which resist ignition or slow flame spread. So, in this context, these classes indicate a low level of fire resistance, meaning the material can catch fire and contribute to flame propagation more readily.

Flame spread ratings show how quickly a material will ignite and how fast flames can travel across its surface. Materials labeled as flame spread class 1, 2, or 3 are described as easily combustible because they ignite readily and allow flame to spread with little resistance. This is in contrast to noncombustible or fire-resistant materials, which resist ignition or slow flame spread. So, in this context, these classes indicate a low level of fire resistance, meaning the material can catch fire and contribute to flame propagation more readily.