The standard’s unique contribution is detailing : | Material | Min Thickness | Fire Rating | |----------|--------------|--------------| | Concrete (reinforced) | 4 inches | 2 hours | | Gypsum-based spray | 1.5 inches | 2 hours | | Intumescent coatings | varies | 2 hours (tested) |

host user-uploaded summaries and partial papers for reference. Intertek Inform Core Content of API 2510A