Steel Bridge Erection Practices (2005) / Chapter Skim
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Pages 12-13
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From page 12... ...
UNANTICIPATED DISTORTION General Two erectors agreed that there are generally few problems with the alignment of straight girders. Problems occur with deflection, web verticality, and elevation on certain highly skewed or curved and skewed bridges.
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From page 13... ...
The problems often are a result of unanticipated differential deflections between adjacent girders in sharply skewed or curved bridges, improper or inadequate use of falsework, poor horizontal and vertical alignment control, use of oversized holes, or detailing inconsistencies. Four fabricators reported problems as a result of unanticipated distortions in the span of bridges.
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