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[quote user="rdamon"]Interesting video ... Not in German ;) Warning Bad Language [/quote] Thank you for posting. I hadn't seen the dash cam videos before. It sounds like a reasonable explanation what happened. The why is not so plain for me. When in the final position the strut, that might have caused the failure, is a compression member. When on the SPTMs during transport that same strut was a tension member as the bridge end cantilevered in this state. So let's assume the strut was pre-tensioned for the transporting state so that there were no tensile stresses left to avoid cracks. When the bridge was placed on the columns there was compressive stress added to the already compressed strut it seems. But not really. Additional compressive force means the strut gets shorter with the pretensioning bar inside getting shorter too and loosing part of is tensile force on the way. So what was the reason to get to this tensioning bar again? And why let loosing this bar let the bridge collapse? According to the drawing there were three more tensioning bars in that strut. For me it looks like the last strut survived: <a href="https://cdn.cnn.com/cnnnext/dam/assets/180315142241-02-bridge-collapse-screengrab-0315-exlarge-169.jpg">https://cdn.cnn.com/cnnnext/dam/assets/180315142241-02-bridge-collapse-screengrab-0315-exlarge-169.jpg</a> Might have been the second diagonal strut. During transport it was compressed but in the final position it was a tension member. From my point of view correcting the pre-stressing power in this diagonal makes more sense. I feel it is still speculation. Perhaps the proposal reveals some more information. Regards, Volker PS.: Here is the proposal for the bridge: <a href="https://facilities.fiu.edu/projects/BT_904/MCM_FIGG_Proposal_for_FIU_Pedestrian_Bridge_9-30-2015.pdf">https://facilities.fiu.edu/projects/BT_904/MCM_FIGG_Proposal_for_FIU_Pedestrian_Bridge_9-30-2015.pdf</a> Edit: Link replaced
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