surface burning characteristics

Surface burning characteristics describe how a material ignites, sustains, and spreads fire on its surface. Key aspects include ease of ignition, the speed at which fire spreads across the surface, the intensity of combustion, and whether it produces significant smoke or flames. Understanding these properties helps determine a material's fire safety and how quickly a fire might grow, guiding safe building design and material selection for fire resistance. Essentially, it assesses how a material behaves when exposed to fire rather than how deep or fully it burns internally.