Steel Bridge Erection Practices (2005) / Chapter Skim
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From page 10... ...
Another erector indicated that it is desirable that the flanges be sized so that each individual girder piece can laterally support itself when erected in a simple span or cantilever condition, depending on the erection sequence. With longer spans and smaller flanges, temporary lateral support trusses made of angles and wire rope are often required until adjacent girders are erected and permanent crossframes and lateral bracing are connected.
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From page 11... ...
Furthermore, it stated that geometry control is most important; preferring concentric, not oversized, holes in all members to ensure alignment, spacing, and cross-slope geometry with the exception of secondary members such as lateral bracing. Another erec12 tor stated that the use of drift pins before bolting ensures proper alignment.
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