The thickness of intumescent paint required for maximum fire resistance depends on several interrelated factors, including the substrate type (steel, wood, or gypsum), the steel section’s weight-to-heated-perimeter ratio (W/D), the desired fire-resistance rating (typically 60 to 180 minutes), and the specific product’s tested performance data per ANSI/UL 263 and ASTM E119 standards. There is no […]
