UL 1479-2021 pdf download

UL 1479-2021 pdf download.Fire Tests of Penetration Firestops.
2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3 References 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 4 Glossary 4.1 For the purpose of this standard the following definitions apply. 4.2 AIR-FLOW METERING SYSTEM – A device used to measure the air flow. 4.3 AIR LEAKAGE (Q) – The volume of air flowing, per unit of time, through the openings around the test sample under a test pressure difference, expressed as ft 3 /min (m 3 /s). This air leakage volume is to be reported standardized to an ambient air temperature of 75°F (24°C). 4.4 AIR LEAKAGE TEST CHAMBER – A sealed chamber or box with an opening, a removable mounting panel, or one open side in which or against which the test sample is installed and sealed. 4.5 AIR SYSTEM – A controllable blower, compressed air supply, exhaust system, or reversible blower designed to provide an essentially constant required air flow at the specified fixed test pressure difference for the period required to obtain readings of air leakage. 4.6 AMBIENT TEMPERATURE EXPOSURE – The temperature at the exposed face of the test sample is to be 75 ±20°F (24 ±11°C).
5 Fire Exposure Test 5.1 Test sample 5.1.1 Through-penetration firestop 5.1.1.1 For through-penetration firestop systems, the penetrations and supporting construction to be tested shall be representative of the construction for which ratings are desired with respect to materials, workmanship, and details such as dimensions of parts. The through-penetration firestop system is to be installed in accordance with the manufacturer’s specified installation instruction procedure. When a through-penetration firestop is intended for use in both floor and walls, each orientation is to be tested unless it is demonstrated that testing in a single orientation does not affect the test results. 5.1.1.2 Penetrating items are to be installed in the test sample so that they extend a minimum of 11 in (279 mm) from the exposed side, and a maximum of 37 in (940 mm) from the unexposed side unless either or both of these extensions are not characteristic of actual field installations. For conditions where a penetrant is required to be longer for the Water Leakage Test, Section 8, the unexposed side penetrant is permitted to extend a maximum of 4 in (100 mm) beyond the water level utilized per Section 8 to accommodate the additional length needed for water leakage testing and securement of the penetrant. For partially insulated penetrations, a minimum of 11 in (279 mm) of the bare penetration shall extend beyond the termination of the insulation on the exposed side of the assembly. The extended portions of the penetrating items on the unexposed side are to be mechanically supported by a metal rack and secured at no more than two points.
5.1.2 Membrane-penetration firestop systems for other than outlet boxes 5.1.2.1 For membrane-penetration firestop systems for other than outlet boxes, the penetrations and supporting construction to be tested shall be representative of the construction for which ratings are desired with respect to materials, workmanship, and details such as dimensions of parts. The membrane- penetration firestop system is to be installed in accordance with the manufacturer’s specified installation instruction procedure. 5.1.2.2 Each representative construction type of membrane-penetration firestop system for which rating is desired is to be tested. The membrane-penetration system, other than metallic outlet boxes, shall be evaluated with the firestop system exposed to the furnace condition and also a second configuration with the firestop system facing away from the furnace. If it is determined by the testing laboratory that one exposure is representative of both exposures, the testing laboratory shall test that one exposure.UL 1479-2021 pdf download.