Answer :
Final answer:
ASTM E814 and UL 1479 are technical standards that detail methods for testing the effectiveness of firestops, which prevent the spread of fire and smoke.
Explanation:
The United States firestop standards referenced in your question are ASTM E814 and UL 1479, which are Standard Test Methods for Fire Tests of Through-Penetration Firestops. These technical standards provide methods for evaluating the performance of firestops, which are systems designed to prevent the spread of fire and smoke through openings in walls, floors, and other barriers. Both ASTM E814 and UL 1479 include tests using a specific heat and pressure conditions to assess the effectiveness of a firestop product in preventing the spread of fire and smoke.
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