Opinions On This 50m Steel Span Bridge Without Supports

[morrobay]

The bridge sections in photo are being welded / bolted ? together on site. Is this going to be structurally
strong enough for a pedestrian bridge ?

 

[phinds]

Do you seriously think that nothing but the "information" in that picture is enough to base an engineering judgement on?

 

[berkeman]

I see a squirrel, what a cute squirrel. What is that he's eating?

 

[BvU]

It will certainly be safer than crossing a ten-lane racing circuit ...

 

[morrobay]

Do you seriously think that nothing but the "information" in that picture is enough to base an engineering judgement on?

No , but without inspecting it the general question is the stability of a 50m span with 3 sections put together on site and no center support
https://www.thaivisa.com/forum/topic/1056216-new-pedestrian-bridge-engineering/?page=4

 

[phinds]

No , but without inspecting it the general question is the stability of a 50m span with 3 sections put together on site and no center support
https://www.thaivisa.com/forum/topic/1056216-new-pedestrian-bridge-engineering/?page=4

And the answer is ... not enough information

 

[Tom.G]

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.)

 

[Baluncore]

Is this going to be structurally strong enough for a pedestrian bridge ?

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.

 

[phinds]

I have only light knowledge of structural design but that truss made of 8 inch (20cm) I-beams and box-beams...

and you are getting this from the picture, how?

 

[cjl]

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.

 

[phinds]

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.

I assumed those were all just examples of the KIND of structure he's talking about

 

[cjl]

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.

 

[russ_watters]

Is this going to be structurally
strong enough for a pedestrian bridge ?

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.