REI120

REI120 refers to a fire resistance rating, specifically indicating that a product or system can withstand fire for a period of 120 minutes. This rating is determined through standardized fire resistance testing conducted by accredited laboratories. The testing typically involves exposing a sample of the product or system to a controlled fire according to a specific time-temperature curve, simulating a real-world fire event.

During the test, various performance criteria are monitored. These include the integrity of the barrier, meaning its ability to prevent the passage of flames and hot gases. Another crucial criterion is insulation, which measures the temperature rise on the unexposed side of the barrier. If the product or system maintains its structural integrity and limits the temperature rise below specified thresholds for the full 120 minutes, it achieves the REI120 rating.

This rating is commonly applied to building elements such as fire doors, firewalls, and structural components. It signifies a high level of protection against fire spread and collapse, contributing significantly to life safety and property protection in buildings. Building codes and regulations often mandate specific fire resistance ratings for different building elements based on occupancy type, building size, and proximity to other structures. An REI120 rating indicates a substantial level of fire performance, offering extended resistance to fire conditions.