1.1 本指南提供了一种评估建筑系统抵抗烟雾通过的相对有效性的方法。 1.2 评估建筑系统相对有效性的方法基于形成建筑系统的建筑元件的开口、贯穿件、接缝和界面的泄漏率的聚合。 1.3 单位- 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。1.5 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====== 5.1 使用本指南有助于确定建筑系统的相对有效性，因为它涉及在环境温度和高温下防止燃烧产物在建筑空间之间通过的潜在保护。 5.2 确定建筑系统限制建筑空间之间的总空气泄漏的相对有效性在评估和选择潜在的建筑部件以满足建筑的期望性能要求中是重要的。5.3 为了正确评估建筑系统的总空气泄漏率的相对有效性，需要关于如何将单个部件的空气泄漏率汇总成建筑系统的总空气泄漏率的指南。 5.4 本指南的目的是提供一种方法，用于将单个部件的空气泄漏率转换为公共值，这些公共值可以汇总为建筑系统的总空气泄漏率，从而提供一种用于确定各种建筑系统阻止燃烧产物通过的相对有效性的方法。

1.1 This guide provides a method of evaluating the relative effectiveness of building systems to resist the passage of smoke. 1.2 The method of evaluating the relative effectiveness of a building system is based on the aggregation of leakage rates of openings, penetrations, joints, and interfaces of the construction elements forming the building system. 1.3 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.4 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. 1.5 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 Use of this guide can be beneficial in determining the relative effectiveness of building systems as it relates to potential protection from passage of products of combustion between building spaces under both ambient and elevated temperatures. 5.2 Determining the relative effectiveness of a building system to limit the total air leakage between building spaces is important in the evaluation and selection of potential construction components to meet desired performance requirements for a building. 5.3 To properly assess the relative effectiveness of a building system’s total air leakage rate, a guide as to how to aggregate the individual component air leakage rates into a total air leakage rate for the building system is needed. 5.4 It is the intent of this guide to provide a methodology for the conversion of individual component air leakage rates into common values that can be aggregated into a total air leakage rate for a building system, thus providing a means for establishing the relative effectiveness of various building systems to resist the passage of products of combustion.