What should be done with the void between the beam and deck flutes when applying SFRM?

When applying Spray-Applied Fireproofing Material (SFRM), it is essential to fill the void between the beam and deck flutes to ensure proper fire protection. This void can act as a channel for heat and flames, potentially compromising the structural integrity of the beam during a fire event. Filling this void ensures that the fireproofing material is uniformly distributed and provides a consistent level of protection throughout the structure.

By filling the void, the fireproofing application creates a continuous barrier, which not only enhances fire resistance but also contributes to the overall reliability of the fire-safety measures in place. Therefore, the guideline to fill the void unless stated otherwise is based on best practices for ensuring that all areas susceptible to fire exposure are adequately protected. This approach minimizes vulnerabilities that could arise if the void were left empty or only partially filled.