1.1 本规范涵盖了主要用于压载应用的干铸、制造混凝土构件。这些装置由水硬性水泥、水和合适的矿物骨料制成，包括或不包括其他材料。 注1: 用于抵抗风扬的混凝土压载装置系统的设计超出了本规范的范围。在设计抗风压时，应参考建筑规范和其他标准。 注2: 以前，有两个标准涵盖压载物使用的装置。规格 C1491 用于混凝土屋顶摊铺机，主要用于屋顶压载和屋顶薄膜保护。规格 1884年 用于屋顶设备的压载装置。 由于这些装置和应用的相似性，本标准现在成为所有压载应用中使用的制造混凝土装置的单一标准。 1.2 本标准的文本引用了提供解释性材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应被视为本标准的要求。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.5 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。

1.1 This specification covers dry-cast, manufactured concrete units that are primarily used for ballast applications. These units are machine-made from hydraulic cement, water, and suitable mineral aggregates with or without the inclusion of other materials. Note 1: The design of concrete ballast units systems for resisting wind uplift is beyond the scope of this specification. Building codes and other standards should be consulted in designing for wind uplift resistance. Note 2: Previously, there were two standards that covered units used for ballast. Specification C1491 was for concrete roof pavers, primarily used for roof ballast and protection of roof membrane. Specification C1884 was for units for ballast for rooftop equipment. Due to the similarity in these units and application, this standard now serves as the single standard for manufactured concrete units used in all ballast applications. 1.2 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 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 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.