A NIOSH study found that unprotected lightweight engineered I-joist floor assemblies fail after how many minutes of fire exposure?

A NIOSH study indicates that unprotected lightweight engineered I-joist floor assemblies can fail after approximately 6 minutes of fire exposure. This critical time frame emphasizes the importance of understanding how different materials react under fire conditions, especially in construction where lightweight materials might be used due to their benefits in weight and ease of installation.

The study highlights vulnerabilities associated with engineered wood products in fire situations, underscoring the need for appropriate fire protection measures in building design and construction. This data can inform firefighting strategies, building codes, and safety training for firefighters, ensuring preparedness when responding to incidents involving such structures. It's essential for firefighters and safety professionals to understand these time frames to properly assess potential risks during a fire emergency.