What is meant by “tolerance” in a firestop installation?

In the context of firestop installation, "tolerance" refers to the allowable variance in dimensions around the penetrant. This means that when installing a firestop system, there may be slight variations in the size or position of the penetrant (for example, pipes or cables passing through walls or floors) that should not compromise the firestop's effectiveness. Understanding and adhering to these tolerances is crucial to ensure that the firestop material can adequately seal openings and provide the necessary fire resistance.

By considering the allowed dimensional variance, installers can maintain the integrity of the firestop system, ensuring that it effectively prevents the spread of fire, smoke, and gases through the penetrations. This concept is key in ensuring compliance with fire safety regulations and performance standards, ultimately contributing to the overall fire safety of buildings.