Practices for Steel Bridge Fabrication and Erection Tolerances
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.
This Summary Last Modified On: 6/8/2023