1 / 16

Superstructure Project Case Study

Superstructure Project Case Study. Steel vs. Concrete. Short Span Steel Bridges Compete and Win. Case Study Bridges: Side-by-Side Comparison. Audrain County, MO Bridge 411 Built 2012 Steel 4 Girders 47.5 ft Span, 24 ft Roadway Width 2 ft Structural Depth No Skew.

gil-cain
Download Presentation

Superstructure Project Case Study

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Superstructure Project Case Study Steel vs. Concrete

  2. Short Span Steel Bridges Compete and Win

  3. Case Study Bridges: Side-by-Side Comparison Audrain County, MO Bridge 411 Built 2012 Steel 4 Girders 47.5 ft Span, 24 ft Roadway Width 2 ft Structural Depth No Skew Steel Concrete Audrain County, MO Bridge 336 Built 2012 Precast 6 Hollowcore Slab Girders 50.5 ft Span, 24 ft Roadway Width 2 ft Structural Depth 20o Skew

  4. Total Bridge Costs Material = $41,764 Labor = $24,125 Equipment = $21,521 GuardRail = $ 7,895 Rock = $ 8,302 Engineering = $ 8,246 TOTAL = $111,853 Case Study Bridges: Side-by-Side Comparison Steel Concrete Total Bridge Costs Material = $67,450 Labor = $26,110 Equipment = $24,966 GuardRail = $ 6,603 Rock = $ 7,571 Engineering = $21,335 TOTAL = $154,035

  5. Total Bridge Costs per ft2 Total Cost = $ 97.48 / ft2 Total Construction Cost = $ 90.29 / ft2 (no Engineering) Adjusted Construction Cost = $ 83.05 / ft2 (no Engineering or Rock) Case Study Bridges: Side-by-Side Comparison Steel Concrete Total Bridge Costs per ft2 Total Cost = $ 120.82 / ft2 Total Construction Cost = $ 104.08 / ft2 (no Engineering) Adjusted Construction Cost = $ 98.14 / ft2 (no Engineering or Rock)

  6. Superstucture Costs Material Girders = $21,463 Deck Panels = $ 7999 Reinf Steel = $ 3135 Concrete = $ 4180 Labor = $ 5522 Equipment* = $ 500 SUPER TOTAL = $42,799 SUPER TOTAL = $37.54 / ft2 Case Study Bridges: Superstructure Only Comparison (Remove Site Prep, Abutment, Grading & Finishing, Guardrail, Engineering, Rock, Etc) Steel Concrete Superstructure Costs Material Slab Girders = $50,765 Deck Panels = $ 0 ReinfSteel = $ 724 Concrete = $ 965 Labor = $ 4884 Equipment* = $ 4000 SUPER TOTAL = $61,338 SUPER TOTAL = $50.61 / ft2 *County Crane (30 Ton) used for Steel, Larger Rented Crane (100 Ton) Required for Concrete (Equivalent County Crane Cost is $1520, would result in Steel Cost of $38.88 / ft2)

  7. Case Study Bridges: Audrain County, MO • Same bridge conditions: • Structural Depth = 2 ft (No Difference in Approaches) • Roadway Width = 24 ft • Same Abutments for Both Can be Used (Steel Could Use Lighter) • Same Guard Rail System • Same Work Crew Cost increase of 35% Steel: Superstructure $37.54 per ft2 Concrete: Superstructure Cost $50.61 per ft2

  8. Lighter Cranes Required (Owner Cranes Can Save Costs) Steel Bridge - Advantages

  9. Lighter Abutments Possible for Steel Bridges Steel Bridge - Advantages

  10. Cast-in-Place Deck on Prestressed Concrete Deck Panels Steel Bridge - Economy

  11. Simple and Practical Details Steel Bridge - Economy

  12. Elastomeric Bearings & Integral Abutments Steel Bridge - Economy

  13. Weathering Steel Steel Bridge - Economy

  14. Other Bridges in Missouri – Total Constructed Costs Steel Concrete

  15. Other Bridges in Missouri – Average Total Constructed Costs Steel Concrete

  16. Bottom Line: Short Span Steel Bridges Compete and Win Questions or Comments?

More Related