There are a variety of ways to achieve tolerances in steel bridge fabrication and erection. One common method is to use shop assembly, which is the process of assembling steel members in the shop before they are erected on site. Another method is to use oversize holes, which are holes that are slightly larger than the required size.
NCHRP Synthesis 603: Practices for Steel Bridge Fabrication and Erection Tolerances, from TRB's National Cooperative Highway Research Program, details the use of tolerances, which is a complex issue with approaches varying depending on the type of bridge, the specific requirements of the project, and the budget.
National Research Council. 2023. Practices for Steel Bridge Fabrication and Erection Tolerances. Washington, DC: The National Academies Press. https://doi.org/10.17226/27096.
Chapters | skim | |
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Front Matter | i-viii | |
Summary | 1-1 | |
Chapter 1 - Introduction | 2-4 | |
Chapter 2 - Literature Review of Steel Bridge Fabrication Tolerances | 5-16 | |
Chapter 3 - Survey on Steel Bridge Fabrication and Erection Tolerances | 17-35 | |
Chapter 4 - Case Examples | 36-55 | |
Chapter 5 - Summary of Findings | 56-58 | |
References | 59-60 | |
Appendix A - Survey Questions | 61-66 | |
Appendix B - Survey Responses | 67-105 | |
Appendix C - Case Example Questionnaire | 106-110 |
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