1.1 本规程描述了在需要AASHTO LRFD设计的情况下，设计整体或分段预制混凝土公用设施结构或分段预制混凝土水和废水结构时应用的最小荷载。规范中涵盖的混凝土管、箱涵和材料 C478型 被排除在本惯例之外。不需要AASHTO LRFD设计的结构应使用ASTM中规定的荷载进行设计 C857 或ASTM C890 ，如适用。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.3 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。 1.4 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====== 4.1 本规程旨在使用AASHTO LRFD标准化用于设计预制混凝土产品的最小结构荷载。 4.2 提醒用户将预期的现场条件和要求与设计荷载适当关联。现场条件可能决定负载大于此处所述。

1.1 This practice describes the minimum loads to be applied when designing monolithic or sectional precast concrete utility structures, or sectional precast concrete water and wastewater structures, where AASHTO LRFD design is required. Concrete pipe, box culverts, and material covered in Specification C478 are excluded from this practice. Structures not requiring AASHTO LRFD design are to be designed using the loads specified in ASTM C857 or ASTM C890 , as applicable. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only. 1.3 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. 1.4 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 ====== 4.1 This practice is intended to standardize the minimum structural loads used to design a precast concrete product using AASHTO LRFD. 4.2 The user is cautioned to properly correlate the anticipated field conditions and requirements with the design loads. Field conditions may dictate loads greater than described here.