When assessing spray-applied fireproofing, which properties must be evaluated for compliance?

When assessing spray-applied fireproofing, it is crucial to evaluate specific properties that directly impact the effectiveness and compliance of the fireproofing material. The fire resistance rating is essential because it indicates the material's ability to withstand fire exposure for a specified duration. This property ensures that in the event of a fire, the structural integrity of the building will be maintained for a designated period, providing protection for occupants and allowing safe evacuation.

Adhesion strength is another critical property, as it measures how well the fireproofing material adheres to the substrate. Proper adhesion is vital to prevent failure of the fireproofing system, which can occur if the material is not securely bonded, leading to delamination during a fire.

Thickness is also a key factor in compliance assessments. The specified thickness must be applied according to the manufacturer's recommendations and the relevant building codes to achieve the intended fire resistance. Insufficient thickness can undermine the protective properties of the fireproofing, increasing the risk of structural failure in a fire scenario.

In contrast, factors such as color uniformity, weight, price, application method, surface texture, drying time, brand reputation, and availability, while important considerations in other contexts, do not directly reflect the fireproofing's performance or compliance