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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

slide2

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.
slide9

Construction Sequence (Cont’d.)

11th

15th

12th

13th

14th

70

60

50

Temperature F degrees

40

30

Accident

Girder Erection