1.1 本建筑材料比较表面燃烧行为的防火测试响应标准适用于墙壁和天花板等外露表面。试验是在试样处于天花板位置的情况下进行的，待评估的表面朝下暴露在点火源下。试验期间，材料、产品或组件应能够安装在试验位置。因此，试样应通过其自身的结构质量实现自支撑，通过沿试验表面添加的支撑件固定到位，或从背面固定。 1.2 试验方法 E84 是一种10分钟的火灾测试响应方法。以下标准涉及根据测试方法对材料进行测试，这些测试方法是测试方法或用于测试方法的仪器的应用或变体 E84 : 1.2.1 用户为满足延长30分钟隧道试验所需的材料应按照试验方法进行测试 E2768 . 1.2.2 用于空气处理空间的电线和电缆应按照NFPA 262进行测试。 1.2.3 控制系统的气动管道应按照UL 1820进行测试。 1.2.4 可燃喷淋管道应按照UL 1887进行测试。 1.2.5 用于空气处理空间的光纤和通信电缆管道应按照UL 2024进行测试。 注1: 附件A13 包括描述本节所列标准以外的标准的附加信息，该标准还利用了用于测试方法的设备的修改 E84 . 1.3 本试验方法的目的是通过观察沿试样的火焰蔓延来确定材料的相对燃烧行为。 报告了火焰蔓延和烟雾发展指数。然而，这两个测量值之间不一定有关系。 1.4 在试样下侧使用支撑材料可以降低火焰蔓延指数，而如果试样可以在没有这种支撑的情况下进行测试，则可以获得火焰蔓延指数。这些测试结果不一定与没有这种支持的测试材料获得的指标有关。 1.5 对熔化、滴落或分层到破坏火焰前缘连续性程度的材料进行测试，会导致火焰蔓延指数较低，与测试留在原地的材料所获得的指数没有直接关系。 1.6 单位-- 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.7 本标准的文本引用了提供解释性信息的注释和脚注。除表和图中的注释和脚注外，这些注释和脚注不应被视为本标准的要求。 1.8 本标准用于测量和描述材料、产品或组件在受控条件下对热和火焰的反应，但本身并不包括火灾所需的所有因素- 在实际火灾条件下对材料、产品或组件进行危险或火灾风险评估。 1.9 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.10 防火测试具有固有的危险性。在进行这些测试时，应采取足够的人员和财产保护措施。 1.11 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 本试验方法仅用于在本文所述的特定火灾暴露条件下，提供表面火焰蔓延和烟雾密度测量值与选定等级的红橡木和纤维水泥板表面的比较测量值。 4.2 该试验方法将一个标称长24英尺（7.32米）、宽20英寸（508毫米）的试样暴露在受控的气流中，并调整火焰暴露量，使火焰沿选定等级的红橡木试样的整个长度传播5分钟 1. / 2. 最小。 4.3 本试验方法不提供以下内容: 4.3.1 测量通过被测表面的热传递。 4.3.2 由于靠近可燃墙壁和天花板，组件的火焰蔓延行为加剧。 4.3.3 通过火焰蔓延指数本身将材料分类或定义为不燃材料。

1.1 This fire-test-response standard for the comparative surface burning behavior of building materials is applicable to exposed surfaces such as walls and ceilings. The test is conducted with the specimen in the ceiling position with the surface to be evaluated exposed face down to the ignition source. The material, product, or assembly shall be capable of being mounted in the test position during the test. Thus, the specimen shall either be self-supporting by its own structural quality, held in place by added supports along the test surface, or secured from the back side. 1.2 Test Method E84 is a 10-min fire-test response method. The following standards address testing of materials in accordance with test methods that are applications or variations of the test method or apparatus used for Test Method E84 : 1.2.1 Materials required by the user to meet an extended 30-min duration tunnel test shall be tested in accordance with Test Method E2768 . 1.2.2 Wires and cables for use in air-handling spaces shall be tested in accordance with NFPA 262. 1.2.3 Pneumatic tubing for control systems shall be tested in accordance with UL 1820. 1.2.4 Combustible sprinkler piping shall be tested in accordance with UL 1887. 1.2.5 Optical fiber and communications raceways for use in air handling spaces shall be tested in accordance with UL 2024. Note 1: Annex A13 includes additional information describing a standard other than those listed in this section that also utilizes a modification of the apparatus used for Test Method E84 . 1.3 The purpose of this test method is to determine the relative burning behavior of the material by observing the flame spread along the specimen. Flame spread and smoke developed index are reported. However, there is not necessarily a relationship between these two measurements. 1.4 The use of supporting materials on the underside of the test specimen has the ability to lower the flame spread index from those which might be obtained if the specimen could be tested without such support. These test results do not necessarily relate to indices obtained by testing materials without such support. 1.5 Testing of materials that melt, drip, or delaminate to such a degree that the continuity of the flame front is destroyed, results in low flame spread indices that do not relate directly to indices obtained by testing materials that remain in place. 1.6 Units— The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.7 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of the standard. 1.8 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire-hazard or fire-risk assessment of the materials, products, or assemblies under actual fire conditions. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.10 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method is intended to provide only comparative measurements of surface flame spread and smoke density measurements with that of select grade red oak and fiber-cement board surfaces under the specific fire exposure conditions described herein. 4.2 This test method exposes a nominal 24-ft (7.32 m) long by 20-in. (508 mm) wide specimen to a controlled air flow and flaming fire exposure adjusted to spread the flame along the entire length of the select grade red oak specimen in 5 1 / 2 min. 4.3 This test method does not provide for the following: 4.3.1 Measurement of heat transmission through the tested surface. 4.3.2 The effect of aggravated flame spread behavior of an assembly resulting from the proximity of combustible walls and ceilings. 4.3.3 Classifying or defining a material as noncombustible, by means of a flame spread index by itself.