UL PRODUCT CATEGORY

Exterior Wall Systems and Components, FWFF


Guide Information for Building Materials

This category covers exterior non-load-bearing wall assemblies and components investigated to ANSI/NFPA 285, "Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Non-Load-Bearing Wall Assemblies Containing Combustible Components," and ANSI/NFPA 268, "Standard Test Method for Determining Ignitibility of Exterior Wall Assemblies Using a Radiant Heat Energy Source," as required by the "International Building Code," ANSI/NFPA 5000, "Building Construction and Safety Code," and other governing Codes of various countries and regions.

ANSI/NFPA 285 is used to investigate the fire-propagation characteristics of exterior non-load-bearing wall assemblies and panels used as components of curtain wall assemblies that are constructed using combustible materials or that incorporate combustible components within the wall assemblies as follows:

1. The ability of the wall assembly to resist flame propagation over the exterior face of the wall assembly,
2. The ability of the wall assembly to resist vertical flame propagation within the combustible core or within other combustible components from one story to the next,
3. The ability of the wall assembly to resist vertical flame propagation over the interior surface of the wall assembly from one story to the next, and
4. The ability of the wall assembly to resist lateral flame propagation from the compartment of fire origin to adjacent compartments or spaces.

ANSI/NFPA 268 is used to investigate the propensity of ignition of exterior wall coverings and assemblies.

Exterior wall systems are covered under Exterior Wall Systems (FWFO).

Components intended for use with the exterior wall systems are covered under Exterior Wall System Components (FWFX).

Combustible exterior wall coverings and assemblies are covered under Exterior Wall Coverings Certified as to Ignitibility (FWFM).

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Last Updated on 2017-10-19
FWFF.GuideInfo FWFF Active 20171019 20171030

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