Which type of failure describes a separation within SFRM?

The type of failure that describes a separation within Spray-Fire-Resistive Material (SFRM) is cohesive failure. Cohesive failure occurs when the material itself fails, resulting in a separation within the material rather than at the interface with the substrate or with another layer of material.

In the context of SFRM, cohesive failure signifies that the bonding strength within the SFRM material is insufficient to hold it together under stress or when exposed to various conditions, such as temperature changes or mechanical impacts. This type of failure is significant because it indicates that the material is not homogeneous and may possess weaknesses that can compromise its effectiveness as a fire protective barrier.

Understanding cohesive failure is essential for inspectors and those involved in the application of SFRM because addressing these weaknesses can help improve the overall performance of fireproofing systems. By recognizing when cohesive failure occurs, inspectors can recommend appropriate remedial actions, such as replacing defective sections or modifying application techniques to enhance the material's consistency and integrity.