UL 9-2020 pdf free download

UL 9-2020 pdf free download.Fire Tests of Window Assemblies.
disk 1/2 in (12 mm) in diameter and 0.01 in (0.2 mm) thick, which is secured to the surface of the specimen at the required position. The thermocouples are to be placed under flexible, oven-dry, felted pads. The properties of these pads are to comply with the requirements specified in Appendix B. Requirements for Thermocou pie Pads.
5.3.3 When measured, the unexposed surface temperatures are to be taken at not less than two points, with a minimum of one thermocouple in each 16-ft2 (1.5 m2) area of the glazing material. Thermocouples are not to be located more than 12 in (305 mm) from the edge of the framing.
5.3.4 The disk and the pad are to be fixed to the surface of the specimen by a sodium silicate (water glass) adhesive or an adhesive that is rated for use at temperatures equal to or greater than 700° F
(370°C).
5.3.5 The thermocouples and pads are to be removed after 30 minutes of fire exposure.
Exception: The thermocouples and pads are to remain on the assembly when unexposed surface temperature data beyond the first 30 minutes of fire exposure is being evaluated.
5.4 Fire endurance test
5.4.1 The pressure in the furnace chamber is to be maintained as described in 3.3.8 for window assemblies tested under positive pressure conditions, and as in 3.3.9 for window assemblies tested under neutral pressure conditions.
5.4.2 The test is to be continued for the predetermined test exposure unless the conditions of acceptance set forth in Section 6 are exceeded in a shorter period.
5.4.3 The distance between the junction of the thermocouples used to measure furnace temperature is to be adjusted during the test so that the distance remains at6 ii in (152 ±25 mm) during the test.
5.5 Hose stream test
5.5.1 Immediately following the fire endurance test and within 1-1/2 minutes, the fire exposed side of the test assembly is to be subjected to the impact, erosion, and cooling effects of the hose stream.
5.5.2 The hose stream is to be delivered through a 2-1/2-in (63.5-mm) hose discharging through a National Standard playpipe of corresponding size equipped with a 1-1/8 in (28.6 mm) discharge tip of the standard-taper smooth-bore pattern without shoulder at the orifice.
5.5.3 The tip of the nozzle is to be located 20 ft (6.1 m) from, and on a line normal to, the center of the test assembly. UL 9-2020 pdf free download.