Which standard governs the rating of wood shingles?

• A. NFPA 256
• B. NFPA 101
• C. NFPA 70
• D. NFPA 13

Answer: (A)

Wood shingles are evaluated for fire performance using standardized fire tests that reveal how they behave under flame exposure. The standard that governs how these ratings are determined is NFPA 256, which provides the test methods for evaluating building construction materials under fire conditions, including roof coverings like wood shingles. This testing establishes the material’s fire resistance or flame-spread characteristics used in rating the shingles.

The other standards cover different topics: NFPA 101 focuses on life safety and means of egress, NFPA 70 is the electrical code, and NFPA 13 covers sprinkler systems. They do not specify the test methods for rating wood shingles.