Penetration firestops play a crucial role in maintaining a building’s fire resistance by preventing fire and smoke from spreading through service penetrations. In this article, John Muse and Kevin Zachariah explore the importance of proper installation, testing standards, and certification processes to ensure fire safety compliance.

When the topic of passive fire protection arises, the first point often discussed is its role in compartmentation. Compartmentation is essential for life safety, as it protects or subdivides escape routes and provides internal or external means of escape. It also plays a critical role in property protection by limiting fire spread and containing fire and smoke to the point of origin, ensuring the safety of both the building and its occupants.

A common concern is how services that pass through these compartments impact fire resistance. These services, which breach fire-resistant barriers, are categorized as through penetration firestops (passing through both faces of a wall or floor) or membrane penetration firestops (breaching only one surface). In both cases, the fire rating of the separating element is affected.

Penetration firestops are designed to restore the compromised fire rating. These assemblies are essential for all openings in fire-resistant walls and floor/ceiling assemblies. A through-penetration firestop assembly consists of materials specifically designed to work with penetrating items such as cables, ducts, pipes, or mechanical supports. This assembly helps maintain the integrity and insulation properties of fire-separating elements.

Observational studies and lab experience have identified common failure points when testing penetration firestops against fire testing standards such as ASTM E814, EN 1366-3, IS 12458, and UL 1479.

One significant issue arises when service penetrations exceed the recommended annular space parameters for firestop sealants, often leading to system failure. Additionally, proper installation is critical, including allowing adequate curing time after applying sealant, as failure to do so can render the firestop ineffective.

Furthermore, firestop systems must not support the penetrating item, as per international firestop standards. Inadequate service support can transfer loads onto the firestop seal, causing failure during fire tests. Other common causes of failure include improper installation, using non-listed firestop sealants, and failing to maintain or replace service supports over time.

The Role of Fire Testing and Certification

Fire testing is essential for certification, demonstrating how long a firestop assembly can endure a fire while maintaining its integrity. The certification process begins with selecting and marking the firestop assembly under the supervision of a certification engineer.

Once the fire test is successfully completed and the firestop meets the required fire rating, a certification body conducts audits to review the production process and ensure compliance with quality standards. Upon completion of the audit, the certification body allows the firestop manufacturer to use a certification mark, indicating that the product meets the necessary quality and safety standards.

It is important to note that the personnel installing penetration firestops on-site may differ from those trained for fire testing installations. This is where inspection teams play a crucial role. They conduct Conformity Assessments after installation to verify that the firestop matches what was originally tested.

By ensuring proper certification, testing, and inspection, penetration firestops can effectively compartmentalize buildings, safeguarding both people and property in the event of a fire.

If you would like to learn more about bringing your penetration firestops to market, please reach out to fire@bell-wright.