本文件提供了符合6.1中规定限制条件的道路预应力混凝土箱梁桥的设计信息。本文件中规定的设计规则是对更详细要求的简化。在箱形梁桥的几种架设方法中，本文件的规定主要适用于全分段法（FSM）。 新公路桥梁的设计和细节通过考虑以下因素来解决结构完整性问题: -？使用连续性和冗余来提供一条或多条备用路径； -？抗损坏或不稳定的结构构件和轴承座宽度；和 -？外部保护系统，以尽量减少合理设想的严重负载的影响。

This document provides information to perform the design of the prestressed concrete box girder bridge for road that complies with the limitations established in 6.1. The rules of design as set forth in the document are simplifications of more elaborate requirements. Among several erection methods of box girder bridges, the provisions of this document are mainly applicable to full staging method (FSM). Designs and details for new road bridges address structural integrity by considering the following: —    the use of continuity and redundancy to provide one or more alternate paths; —    structural members and bearing seat widths that are resistant to damage or instability; and —    external protection systems to minimize the effects of reasonably conceived severe loads.