Penetrations in fire-resistance-rated walls must be installed as tested in what type of assembly?

Penetrations in fire-resistance-rated walls must be installed as tested in an approved fire-resistance-rated assembly because this ensures that the integrity and performance of the wall are maintained. Fire-resistance-rated assemblies are specifically designed and tested to resist the spread of fire for a predetermined period. When penetrations occur—whether through pipes, ducts, or other openings—they can compromise the wall’s fire-resisting capabilities.

Using an approved fire-resistance-rated assembly means that the installation of the penetration must adhere to the same standards and methods used during testing. This helps maintain the fire barriers necessary to protect lives and property by preventing smoke and flames from moving from one area to another during a fire event.

In contrast, non-rated assemblies would not provide the necessary fire-resistance characteristics, and temporary assemblies may lack the durability or compliance needed for long-term use. Installing penetrations in any assembly without the strict adherence to tested methods could lead to dangerous consequences, making it critical to follow the approved procedures established for fire-resistance-rated constructions.