1.1 本火灾测试响应标准规定了一种定性评估屋檐悬挑和其他突出物（如屋顶屋檐和悬挑地板突出物的拱腹）在暴露于模拟外部野火暴露的直接火焰冲击时的耐火性的方法，例如在“野地-城市界面”场景中遇到的情况。本试验方法提供的数据适用于比较用作屋檐悬挑和其他突出物的暴露底面的材料的相对性能。 1.2 本试验方法测量了屋檐悬挑和其他突出物在暴露条件下抵抗火从外部渗透到墙体空腔或试样未暴露侧的能力。 1.3 本试验方法适用于屋檐悬挑和其他突出物，如用于可燃或不可燃建筑围护结构的屋檐拱腹和悬挑地板突出物。 1.4 第节列出了试验方法的局限性 5. . 1.5 以公制单位表示的值应视为标准。括号中的值仅供参考。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 1.7 本标准用于测量和描述材料、产品或组件在受控实验室条件下对热量和火焰的响应，但其本身并不包括在实际火灾条件下对材料、产品或组件进行火灾危险或火灾风险评估所需的所有因素。 1.8 防火测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 1.9 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（包括表和图中的注释和脚注）不应视为本标准的要求。 1.10 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本文所述的试验方法监测了火灾特性以及屋檐悬挑和其他突出物在规定的火灾暴露条件下抵抗来自下方的外部火灾渗透的能力。 5.2 当这些细节代表最终用途结构时，屋檐悬挑或突出部分的代表性接缝和其他特征应包括在试样中。 5.3 本试验方法不适用于用于封闭或盖住屋檐、拱腹和其他突出物的通风口或穿孔材料。 注1: 试验方法 E2912 和 E2886/E2886M 是用于测试通风口或穿孔材料以抵抗直接火焰冲击和火焰穿透建筑物的方法。 5.4 该试验方法适用于屋檐悬挑和其他独立于覆盖建筑围护结构的材料的突出部分。 注2: 本试验方法不考虑覆盖建筑围护结构的燃烧材料超过规定火灾暴露的热量贡献。 5.5 该测试方法不一定代表屋檐悬挑和突出物在所有实际火灾条件下的预期性能，但它确实为在进行本文所述测试程序时比较屋檐悬挑和突出物材料提供了基础。 5.6 在本程序中，将试样置于特定的实验室火灾试验条件下。如果替换了不同的测试条件或预期的最终使用条件发生了变化，则不知道是否可以通过使用该测试来预测所测性能特性的变化。因此，结果仅在耐火试验条件和结构试验中严格有效。 5.7 本试验方法不提供确定屋檐悬挑或突出物在暴露于源自建筑物的火灾时的耐火特性的任何依据。 5.8 本试验方法不涉及内部或外部火焰传播。

1.1 This fire-test-response standard prescribes a method for qualitatively assessing the resistance to fire penetration of eave overhangs and other projections, such as the soffits of roof eaves and cantilevered floor projections, when exposed to direct flame impingement from a simulated external wildfire exposure, such as encountered in a “Wildland Urban Interface” scenario. This test method provides data suitable for comparing the relative performance of materials, which are used as the exposed underside surfaces of eave overhangs and other projections. 1.2 This test method measures the ability of eave overhangs and other projections to resist fire penetration from the exterior into the wall cavity or unexposed side of the test specimen under the conditions of exposure. 1.3 This test method is applicable to eave overhangs and other projections such as the soffits of roof eaves and cantilevered floor projections intended for use with either combustible or noncombustible building envelopes. 1.4 Limitations of the test method are listed in Section 5 . 1.5 The values stated in metric units are to be regarded as the standard. Values in parentheses are for information only. 1.6 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 and health practices and determine the applicability of regulatory limitations prior to use. 1.7 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled laboratory 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. 1.8 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.9 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (including those in tables and figures) shall not be considered as requirements of the standard. 1.10 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 ====== 5.1 The test method described herein monitors the fire characteristics and the ability of eave overhangs and other projections to resist exterior fire penetration from underneath under the specified fire exposure conditions. 5.2 Representative joints and other characteristics of the eave overhang or projection shall be included in the test specimen when these details are representative of the end-use construction. 5.3 The test method does not apply to vents or perforated materials used to enclose or cap eaves, soffits, and other projections. Note 1: Test Methods E2912 and E2886/E2886M are methods used to test vents or perforated materials to resist direct flame impingement and flame penetration into the building. 5.4 The test method is devised for eave overhangs and other projections independent of the materials covering the building envelope. Note 2: Heat contribution from burning materials covering the building envelope beyond the prescribed fire exposure is not considered in this test method. 5.5 The test method does not necessarily represent the expected performance of eave overhang and projections under all actual fire conditions, but it does provide a basis for comparing eave overhang and projections materials when subjected to the test procedure described herein. 5.6 In this procedure, the test specimen is subjected to specific laboratory fire test conditions. If different test conditions are substituted or the anticipated end-use conditions are changed, it is not known whether it is possible by use of this test to predict changes in the performance characteristics measured. Therefore, the results are strictly valid only for the fire test conditions and construction tested. 5.7 The test method does not provide any basis for determining the fire resistance characteristics of eave overhangs or projections when exposed to a fire originating in the building. 5.8 The test method does not address interior or exterior flame spread.