1.1 本火灾测试响应标准涵盖了暴露于源自建筑物外部的模拟火源的屋顶覆盖物的相对火灾特性的测量。当按预期用途使用时，适用于安装在易燃或不易燃屋顶板上的屋顶覆盖物。包括以下试验方法: 1.1.1 间歇性火焰暴露试验。 1.1.2 火焰蔓延试验。 1.1.3 燃烧品牌测试。 1.1.4 飞行品牌测试。 1.1.5 雨水测试。 1.2 描述了三类火灾试验暴露: 1.2.1 A类测试 适用于预计可有效防止严重火灾暴露、对屋顶甲板提供高度防火保护、不会从位置滑落以及预计不会造成飞行危险的屋顶覆盖物。 1.2.2 B类测试 适用于预计可有效抵抗中度火灾暴露、对屋顶甲板提供中等程度防火保护、不会从位置滑落以及预计不会造成飞行危险的屋顶覆盖物。 1.2.3 C类测试 适用于有效防止轻度火灾暴露的屋顶覆盖物，为屋顶甲板提供轻度防火保护，不会从位置滑落，预计不会造成飞行危险。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 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。 1.5 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。 1.6 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。 1.7 本标准的文本引用了提供解释信息的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 ====意义和用途====== 4.1 本文所述的试验方法旨在为屋顶覆盖物的相对比较提供依据。试验方法包括模拟屋顶覆盖物外部的火灾暴露，以及在适用的情况下，确定屋顶覆盖物的防火性能特征是否会因长期暴露在雨水中而受到不利影响。 4.2 这些测试方法测量火焰的表面传播以及屋顶覆盖材料或系统在暴露条件下抵抗从屋顶板外部到底面的火灾渗透的能力。 4.3 这些试验方法还提供了标准，以确定在模拟火灾暴露试验期间，当受到12 mph（5.3 m/s）的风时，屋顶覆盖材料是否会形成飞行燃烧材料，被确定为飞行品牌。 4.4 这些试验方法不一定说明屋顶覆盖物在所有实际火灾条件下的预期性能，但它们确实为比较屋顶覆盖材料在遭受本文所述火源时的性能提供了基础。 4.5 这些试验方法不提供任何依据，以确定当暴露在源自应用屋顶材料的建筑物的火灾中时的耐火特性。 4.6 本文所述的测试方法涉及使用倾斜5英寸的校准平台校准测试设备。每水平英尺（0.416:1）。本文所述的试验在坡度小于等于5英寸的试验台上进行。 每水平英尺。测试暴露的严重性随着测试平台的坡度降低到5英寸以下而降低。每水平英尺。

1.1 This fire-test-response standard covers the measurement of the relative fire characteristics of roof coverings exposed to simulated fire sources originating outside the building. It is applicable to roof coverings intended for installation on either combustible or noncombustible roof decks when applied as intended for use. The following test methods are included: 1.1.1 Intermittent flame exposure test. 1.1.2 Spread of flame test. 1.1.3 Burning brand test. 1.1.4 Flying brand test. 1.1.5 Rain test. 1.2 Three classes of fire test exposure are described: 1.2.1 Class A Tests are applicable to roof coverings that are expected to be effective against severe fire exposure, afford a high degree of fire protection to the roof deck, do not slip from position, and are not expected to present a flying brand hazard. 1.2.2 Class B Tests are applicable to roof coverings that are expected to be effective against moderate fire exposure, afford a moderate degree of fire protection to the roof deck, do not slip from position, and are not expected to present a flying brand hazard. 1.2.3 Class C Tests are applicable to roof coverings that are effective against light fire exposure, afford a light degree of fire protection to the roof deck, do not slip from position, and are not expected to present a flying brand hazard. 1.3 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. 1.4 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. 1.5 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. 1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 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 this standard. ====== Significance And Use ====== 4.1 The test methods described herein are intended to provide a basis for relative comparison of roof coverings. The test methods include simulated fire exposure to the outside of the roof coverings, and, where applicable, a determination as to whether the fire performance characteristics of the roof coverings will be adversely affected by prolonged exposure to rain. 4.2 These test methods measure the surface spread of flame and the ability of the roof covering material or system to resist fire penetration from the exterior to the underside of a roof deck under the conditions of exposure. 4.3 These test methods also provide criteria to determine if the roof covering material will develop flying burning material, identified as flying brands, when subjected to a 12-mph (5.3-m/s) wind during the simulated fire exposure tests. 4.4 These test methods do not necessarily illustrate the expected performance of roof coverings under all actual fire conditions, but they do provide a basis for comparing roof covering materials when subjected to fire sources that are described herein. 4.5 These test methods do not provide any basis for determining the fire resistance characteristics when exposed to a fire originating in the building to which the roofing material is applied. 4.6 The test methods described herein involve calibrating the test equipment using a calibration deck inclined at a slope of 5 in. per horizontal ft (0.416:1). The tests described herein are performed on test decks inclined at slopes up to and including 5 in. per horizontal ft. The severity of the test exposure decreases as the slope of the test deck decreases below 5 in. per horizontal ft.