【国外标准】 Standard Practice for Minimum Structural Design Loading for Monolithic or Sectional Precast Concrete Utility, Water, and Wastewater Structures Using AASHTO LRFD Design

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.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.