UL-10B:2015 pdf free download – STANDARD FOR SAFETY Fire Tests of Door Assemblies.
4A.5 The pressure-sensing probes are to be located at a minimum of 18 inches from the edges of the furnace chamber.
4A.6 The pressure at each location is to be measured using a differential pressure instrument capable of reading in increments no greater than 0.01 inch water gauge (2.5 Pa) with an accuracy of ±0.005 inch water gauge (±1.2 Pa) or better. The differential pressure measurement instrument is to be located so as to minimize stack effects caused by vertical runs of pressure tubing between the pressure-sensing probes and the differential pressure measurement instrument locations.
4A.7 Based on the vertical separation and pressure differences between the two pressure-sensing probes, a calculation of the zero pressure plane is to be made. The furnace pressure is to be positive above the zero pressure plane.
5 Unexposed Surface Temperatures
5.1 Unexposed surface temperatures are to be recorded, and are to be determined in the following manner.
Exception. Single-layer metal doors are not required to comply with this section.
5.2 Unexposed surface temperatures are to be taken at not less than three points, with at least one thermocouple in each 16-square foot (1 .5-m2) area of the door. Thermocouples are not to be located over reinforcements extending through the door, over glass panels, or nearer than 12 inches (305 mm) from the edge of the door.
5.3 Unexposed surface temperatures are to be measured with thermocouples placed under flexible, oven-dry, felted pads. The properties of these pads are to comply with the requirements specified in Appendix B. The thermocouple and felted pad are to be fixed to the surface of the test specimen by mechanical fastening, tape or adhesive, based on the nature of the material forming the specimen. When a mechanical fastening method is used to secure the thermocouple and felted pad, the testing laboratory shall ensure the fastener is not greater than 3/8 inch in length. The pads shall be fixed so as to maintain contact between the thermocouple and the surface of the test specimen.
Revised 5.3 effective February 16, 2018
5.4 Unexposed surface temperatures are to be recorded at intervals not exceeding 1 minute for the first 30 minutes of the test. After 30 minutes the thermocouples and the felted pads are to be removed unless the sponsor requests additional surface temperatures be recorded.
TEST ASSEMBLIES
6 Construction and Size
6.1 The construction and size of the test door assembly, consisting of single doors, doors in pairs, special-use doors (such as Dutch doors or double-egress doors), or multisection doors, shall be representative of that for which classification or rating is specified.
6.2 A floor structure shall be provided as part of the opening to be protected, other than where such floor interferes with the operation of the door. The floor segment shall be of noncombustible material and shall project into the furnace for twice the thickness of the test door, the anticipated deflection of the bottom bar of a rolling door, or to the limit of the frame, whichever is greater.
7 Mounting for Test Purposes
7.1 Swinging doors shall be mounted so as to open into the furnace chamber.
7.2 Sliding and rolling doors, other than horizontal slide-type elevator doors, shall be mounted on the exposed side of the opening in the wall closing the furnace chamber.
7.3 Horizontal slide-type elevator doors shall be mounted on the unexposed side of the opening in the wall closing the furnace chamber.
7.4 Access-type doors and chute-type doors and frame assemblies shall be mounted so as to have one assembly open into the furnace chamber and another assembly open away from the furnace chamber.
7.5 Dumbwaiter and service-counter doors and frame assemblies shall be mounted on the exposed side of the opening in the wall.
7.6 The mounting of all doors shall be such that they fit within the frame, against the wall surfaces, or in guides, and such mounting shall not prevent free and easy operation of the test door.