Who Broke The Bridge?

[zzvyb6]

Its a lateral bending failure, not a vertical overload. Could be wind force or even sun loading on 1 side. Three members = over-strained. ! has to yield.

 

[PILOON]

Its a lateral bending failure, not a vertical overload. Could be wind force or even sun loading on 1 side. Three members = over-strained. ! has to yield.

What about expansion joints? or are they omitted in that style of construction, or climate.

 

[Streetcar]

Cause of failure has not been determined.
Speculation at this point

Its a lateral bending failure, not a vertical overload. Could be wind force or even sun loading on 1 side. Three members = over-strained. ! has to yield.

 

[Streetcar]

It has been long time since bridge in us failed from normal winds

What about expansion joints? or are they omitted in that style of construction, or climate.

 

[Streetcar]

Fracture critical members of bridge require yearly inspection. He deserves to be fired if crack is shown in 2019

It's not very likely they fired him without determining his area of responsibility included the failed beam. Based on the info provided he should have been fired.

 

[PILOON]

It has been long time since bridge in us failed from normal winds

Expansion joints have nothing to do with winds.
They are to allow expansion/shrinkage from temperatures.
At 30-40 below steel can shrink as much as 2-3 inches over a typical bridge span and if firmly affixed, i.e., welded the metal can fail.
Heat can stretch most metals, ('cause them to expand').

 

[FTG-05]

Fracture critical members of bridge require yearly inspection. He deserves to be fired if crack is shown in 2019

They better start going back in time then: There are pics of the crack visible going back to 2016!

This is per a pic shown on the TNDeer.com site.

 

[ArlyA]

They better start going back in time then: There are pics of the crack visible going back to 2016!

This is per a pic shown on the TNDeer.com site.

No pic from 2016?

 

[Diggin It]

Picture from '16 here:

MSN

It's fairly large, so I don't want to embed it.

 

[Darryle]

Picture from '16 here:

MSN

It's fairly large, so I don't want to embed it.

Picture #1 Photos of the Hernando de Soto bride, captured by Memphis resident Barry Moore during an August 2016 canoe trip, suggest the fracture in the steel box beam began much earlier than previously acknowledged.

Picture #2: Based on the meta data from Barry Moore's submitted photo taken in 2016, the Commercial Appeal input the coordinates (35° 9' 13.40"N, 90° 3' 40.00" W) into Google Earth to find approximate location that the photo was captured.