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Construction Sequence. Michele McMurtry. C-470 overpass. Source: Jefferson County Sheriff’s Office. Construction Sequence. 9:00 p.m. on May 11 until 5:00 a.m. on May 12 I-70 to be closed for 8 hours 11:00 p.m. until 12:30 a.m. Hoisting girder sections. Splice plates.

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Construction sequence

Construction Sequence

Michele McMurtry


C-470 overpass

Source: Jefferson County Sheriff’s Office


Construction sequence1
Construction Sequence

  • 9:00 p.m. on May 11 until 5:00 a.m. on May 12

  • I-70 to be closed for 8 hours

  • 11:00 p.m. until 12:30 a.m.

    • Hoisting girder sections


Construction sequence cont d

Splice plates

Construction Sequence (Cont’d.)

The bolts in the photograph are the actual splicing bolts




Construction sequence cont d1
Construction Sequence (Cont’d.)

  • 4:00 a.m. 1st girder in place

    • No time to install 2nd girder

    • Installation of temporary bracing

  • Bolting problems

    • Bolts too long

    • Employee sent for different bolts

  • I-70 reopened at 5:30 a.m.


Construction Sequence (Cont’d.)

11th

15th

12th

13th

14th

70

60

50

Temperature F degrees

40

30

Accident

Girder Erection


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