scope:

This standard sets the performance requirements for skylights under simulated laboratory conditions. They shall be examined for their ability to limit fire propagation on the topside and/or through the assembly, wind resistance, hail resistance, windborne debris and UV exposure. The standard also examines the ability of the skylights to withstand the effects of temporary live loads such as those imposed by foot traffic and snow.

Skylights are normally installed in the plane of the roof but they can be installed in numerous orientations and configurations including what are commonly referred to as north lights or saw tooth applications.

This standard is intended to qualify skylights when their slope is less than or equal to 45° from the horizontal. This standard does not qualify skylights when installed vertically in a north light or saw tooth configuration. When oriented vertically, as would be the case in a north light or saw tooth configuration, the skylight shall be considered as an exterior wall panel. For the certification requirements of exterior wall panels, see FM 4881, Examination Standard for Class 1 Exterior Wall Systems.

This standard is intended to evaluate only those hazards investigated and is not intended to determine suitability for the end use of the product.

This standard does not qualify automatic heat and smoke vents. For the certification requirements of heat and smoke vents, see FM 4430, Examination Standard for Heat and Smoke Vents.

Purpose

This standard states testing and certification requirements for skylights. Skylights are also referred to as roof lights. For purposes of this standard, skylights and roof lights shall be considered as the same product and shall be referred to as skylights.

Testing and certification criteria shall include, but are not limited to, performance requirements, marking requirements, examination of manufacturing facility(ies), an audit of quality assurance procedures, and a surveillance program.