User: Captain's call

Concrete truss construction

On: Was The Florida Pedestrian Bridge Collapse Triggered By Post-Tensioning? (enr.com)

I think that there is a good reason why concrete truss bridges of this type are rare. The connections are fundamentally difficult to analyse correctly, although the member forces can be simply calculated by hand in a few minutes. I believe that an over-reliance on computer generated outputs may be an underlying cause of this failure. And a desire for "innovation" without wanting to pay the price in terms of thorough design reviews.