本手册旨在帮助桥梁业主建立符合国家桥梁检验标准（NBIS）的检验程序和评估实践。手册分为八个部分，每个部分代表整个桥梁检查和评估计划的不同阶段。本版更新了第3节:桥梁管理系统；4:检查；6:额定载荷；7:钢桥的疲劳评估。PDF下载包含2018年10月勘误表和2019年中期修订版，可从以下链接下载，用于硬拷贝版本。2020年中期修订版包含在印刷版中，并纳入PDF。

This manual has been developed to assist bridge owners by establishing inspection procedures and evaluation practices that meet the National Bridge Inspection Standards (NBIS). The manual has been divided into eight sections, with each section representing a distinct phase of an overall bridge inspection and evaluation program. This edition updates Sections 3: Bridge Management Systems; 4: Inspection; 6: Load Rating; and 7: Fatigue Evaluation of Steel Bridges.The PDF Download incorporates the October 2018 Errata and the 2019 Interim Revisions, which can be downloaded from the links below for use with the hardcopy version. The 2020 Interim Revisions are included with the print version and incorporated into the PDF.