“Standard for Positive Pressure Fire Tests of Door Assemblies."
These methods of fire tests are applicable to swinging door assemblies, including door frames with lights and panels, of various materials and types of construction for use in wall openings to retard the passage of fire.
These methods are intended to evaluate the ability of a door assembly to remain in an opening during a predetermined test exposure.
The tests expose a specimen to a standard fire exposure controlled to achieve specified temperatures throughout a specified time period, followed by the application of a specified standard fire hose stream.
For more information, visit the UL website.