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Steel Bridge Erection Practices (2005) / Chapter Skim
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Pages 8-9

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From page 8...
... Curved Box-Girder Assembly All respondents that fabricate boxes do bearing-to-bearing and/or a minimum of three-girder assembly. Five assemble curved box girders with crossframes.
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From page 9...
... The erector should provide an erection procedure that addresses measures that lead to the desired erected structure, keep the ends of the girders aligned and webs vertical, properly orient match-marked splice plates, and use qualified erectors and experienced crews. In general, horizontal and vertical alignment verification of both the substructure and the superstructure at all stages of the process is critical to attaining a well-positioned and erected structure.
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Key Terms

  • box girder
  • progressive assembly
  • shop assembly
  • erection procedure
  • webs vertical

  • curved box
  • box girders
  • curved structures
  • differential deflection
  • drift pins

  • splice plates
  • skewed bridges
  • vertical alignment
  • curved structure
  • crossframe connection

  • erected structure
  • individual girder
  • crossframe connections
  • field connection


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