1.1 本规范涵盖主要用于支撑吸声瓦或吸声铺设板的金属天花板悬挂系统。 1.2 一些悬挂系统包含锁定组件细节，通过在天花板格栅的相邻部分之间提供一些连续性或负载转移能力来提高性能。试验方法的试验方法 E3090/E3090M 本规范中引用的内容不提供完整评估连续梁系统的方法，也不提供评估连续性对整体系统性能的贡献的方法。然而，试验方法可用于评估主要结构构件以及联锁的次要构件，以及非联锁类型的构件。 1.3 虽然本规范适用于金属悬挂系统的外部安装，但大气条件和风荷载需要额外的设计注意，以确保安全实施。因此，对于新建筑物或建筑物改造施工中金属悬挂系统的任何外部应用，应征求负责建筑师和工程师（或两者）的具体审查和批准。 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值； 因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.5 以下安全隐患警告仅适用于本规范中描述的测试方法。 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、健康和环境实践，并确定监管限制的适用性。 1.6 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。

1.1 This specification covers metal ceiling suspension systems used primarily to support acoustical tile or acoustical lay-in panels. 1.2 Some suspension systems incorporate locking assembly details that enhance performance by providing some continuity or load transfer capability between adjacent sections of the ceiling grid. The test methods of Test Methods E3090/E3090M referenced in this specification do not provide the means for making a complete evaluation of continuous beam systems, nor for assessing the continuity contribution to overall system performance. However, the test methods can be used for evaluating primary structural members in conjunction with secondary members that interlock, as well as with those of noninterlocking type. 1.3 While this specification is applicable to the exterior installation of metal suspension systems, the atmospheric conditions and wind loading require additional design attention to ensure safe implementation. For that reason, a specific review and approval should be solicited from the responsible architect and engineer, or both, for any exterior application of metal suspension systems in the construction of a new building or building modification. 1.4 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. 1.5 The following safety hazards caveat pertains only to the test methods described in this specification. 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. 1.6 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.