Fire Hazard Classification of Building Materials

What does the ASTM E84 test primarily measure regarding materials?

Which of the following materials has a flame spread rating of 0?

In high-risk areas, what is the maximum flame spread rating typically allowed?

What is a factor considered in determining failure during fire resistance testing?

Which of the following materials has a flame spread rating that ranges between 100 and 215?

Fire Hazard Classification of Building Materials

Materials are classified according to their reaction to fire
Materials not ignitable up to 1,380°F for 5 minutes are considered noncombustible
Structural base of noncombustible materials with surfacing not more than 6 inches thick and a flame spread rating no higher than 50 are permissible
Other materials with flame spread not higher than 25 without evidence of progressive combustion are also permissible.
Flame spread is measured using ASTM E 84 test (tunnel test)
Flame spread rates are used to determine the hazard-to-life, especially in areas like schools, public assembly, corridors, etc.
Higher flame spread ratings are permitted in areas with lower exposure hazard.

Flame Spread Ratings

Asbestos-cement board: 0
Gypsum plaster: 0
Painted steel: 0
Gypsum lath: 10
Gypsum wallboard: 10 to 15
Vermiculite acoustical plaster: 10 to 15
Acoustical tile (mineral): 10 to 15
Fiberboard tile (plain finish): 76 to 122
Fiberboard tile (acoustical): 82 to 164
Red oak: 100
Douglas fir: 100 to 110
Birch: 105 to 215
Douglas fir plywood: 125 to 195

This quiz explores the classification of building materials based on their fire reaction and flame spread ratings. Learn about the criteria for noncombustibility and acceptable materials in different hazard areas. Test your knowledge on important fire safety standards and ratings relevant for construction.