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Opinions On This 50m Steel Span Bridge Without Supports

  1. Sep 9, 2018 #1

    morrobay

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    The bridge sections in photo are being welded / bolted ? together on site. Is this going to be structurally
    strong enough for a pedestrian bridge ?
    750x422_812013_1535965137.jpg
     
  2. jcsd
  3. Sep 10, 2018 #2

    phinds

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    Do you seriously think that nothing but the "information" in that picture is enough to base an engineering judgement on???
     
  4. Sep 10, 2018 #3

    berkeman

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    I see a squirrel, what a cute squirrel. What is that he's eating? :oldeyes:
     
  5. Sep 10, 2018 #4

    BvU

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    It will certainly be safer than crossing a ten-lane racing circuit ... :rolleyes:
     
  6. Sep 11, 2018 #5

    morrobay

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  7. Sep 11, 2018 #6

    phinds

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  8. Sep 11, 2018 #7

    Tom.G

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    I have only light knowledge of structural design but that truss made of 8 inch (20cm) I-beams and box-beams looks very sturdy. If there had been a center support, the bridge would only remain until a vehicle crashed the center support; a somewhat likely thing to happen.

    I agree the assembly of the three pieces is critical.

    (Dimensions were estimated assuming the bus is 10 feet (3m) high.)
     
  9. Sep 11, 2018 #8

    Baluncore

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    That depends on how many students try to break the "greatest number of people on a bridge" record.
    Where is it? India? Or will it be coated in ice during winter, then hit by a hurricane?
    The pedestrians are the least of the problems.
     
  10. Sep 11, 2018 #9

    phinds

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    and you are getting this from the picture, how?
     
  11. Sep 11, 2018 #10

    cjl

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    There are some more pictures linked in that forum in post 5. It looks pretty sturdy, but you really can't tell any detail without knowing a lot more about the design.
     
  12. Sep 11, 2018 #11

    phinds

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    I assumed those were all just examples of the KIND of structure he's talking about
     
  13. Sep 11, 2018 #12

    cjl

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    Could be. I was under the impression that was the exact structure in question, but regardless, there's no way to say what the safe load and safety factor is without far more info.
     
  14. Sep 11, 2018 #13

    russ_watters

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    Based on the fact that it is a real bridge under construction I conclude that it has been designed by a qualified engineer and the plans reviewed and approved by a qualified code enforcement agency and therefore will be structurally strong enough. Anything beyond that - as others indicate - is pointless speculation. Thread locked.
     
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