Question

Through penetrations of horizontal assemblies shall be protected by an approved firestop system with an F rating/T rating of not less than ____ ____ but not less that the required rating of the floor penetrated.

Answer 1

Through penetrations of horizontal assemblies must be protected by an approved firestop system with a specific F rating/T rating that meets or exceeds the required rating of the floor being penetrated.

Step-by-step explanation:

Through penetrations of horizontal assemblies refer to openings or holes made in floors that can potentially allow fire or smoke to spread between different areas or levels of a building. These openings can include pipe penetrations, ductwork, cable trays, and electrical conduits.

To ensure fire safety, these penetrations must be protected by an approved firestop system. The firestop system should have an F rating/T rating of not less than a certain value, but it cannot be less than the required rating of the floor being penetrated. The specific value required depends on the building codes and regulations applicable in a particular jurisdiction.

For example, if a horizontal assembly has a fire rating of 2 hours, the firestop system used to seal penetrations should also have a fire rating of 2 hours or more.