Where are firestop products typically used?

Firestop products are specifically designed to prevent the spread of fire, smoke, and gases in buildings by sealing openings and joints in fire-resistance-rated wall and floor assemblies. Their primary application is in concealed spaces and around penetrations, which can include areas where pipes, ducts, electrical conduits, and other utilities pass through fire-rated walls and floors.

This is crucial because these penetrations can create pathways for fire and smoke to spread from one compartment to another, potentially compromising the integrity of a building's fire protection systems. By effectively sealing these areas, firestop products help maintain the fire-resistance rating of the assemblies, ensuring that they can function as intended in the event of a fire.

In contrast, the other options do not accurately reflect the primary use of firestop products. For instance, firestop systems are not limited to window frames and doorways, nor are they designed for use in exposed areas where visibility would be prioritized over fire safety. Additionally, restricting the use of firestop products to non-structural elements overlooks their vital role in all types of assemblies that require fire protection, including structural components. Therefore, using them in concealed spaces and around penetrations is essential for comprehensive fire safety in building design.