NFPA 285-2019 PDF Download

NFPA 285 is a standard fire test method that evaluates the fire propagation characteristics of exterior wall assemblies containing combustible components. It provides a means of measuring the flame spread resistance of exterior construction materials when exposed to interior fires that reach flashover, break outside windows, and reveal the building facade.

This standard is crucial for testing laboratories and manufacturers, as it covers details of test specimens, including new types of wall systems and materials, testing documentation, and instrumentation. It also includes the latest requirements, criteria, and diagrams for thermocouple locations.

The 2019 edition of NFPA 285 includes critical changes and additions, such as an expanded scope that applies to buildings of any construction type, revised content that encompasses both bearing and non-load-bearing assemblies, and additional sections that address joint and seam locations and window header construction.