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Flame spread ratings

Interior finishes for walls and ceilings are subject to testing requirements for flame spread and for smoke developed. The Steiner Tunnel Test is alternatively identified as which testing methods (choose 3):
A. ASTM E84, B. UL 723, C. NFPA 253, D. NFPA 255, E. ASTM E662




Answer is ABD: all refer to standardized Steiner Tunnel Tests developed by the major North American standard writing organizations. C & E are related to floor finish testing criteria.

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