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Intumescent Coating for Fire Protection of Structures
Snapshot: After years of development by industry, Forest Service scientists conducted specialized fire tests to prove the value of intumescent coating for fire protection. They developed a hot metal test to verify the superiority of commercial intumescent coatings to protect railroad trestles from ignition by hot braking debris. They used a cone calorimetry test with modified procedures to optimize intumescent construction for foam cored particle boards. Other specialized fire tests were also developed.
Flames in wood crib of creosote-treated timbers, approximately eight minutes after application of hot metal wafer. Robert White, USDA Forest Service