Description

NFPA 285 offers the insight and testing criteria to accurately determine flammability characteristics of exterior wall assemblies to help ensure adequate fire resistance.

NFPA 285, Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Wall Assemblies Containing Combustible Components, provides a method of measuring flame spread resistant properties of external construction materials when exposed to interior fires that reach flashover, break outside windows, and reveal the building facade.

Scope

An essential standard for testing laboratories and manufacturers, NFPA 285 covers details of test specimens including new types of wall systems and materials, testing documentation and instrumentation, and the latest requirements, criteria, and diagrams for thermocouple locations.

Critical changes and additions to the new 2019 edition include:

• Expanded scope applying to buildings of any construction type 
• Revised content to encompass both bearing and non-load-bearing assemblies 
• Addition of sections in Chapter 5 to include joint and seam locations and window header construction