Jeffrey Orling
Senior Member
right and the main contention is if the floor system is robust enough including the connections to substantially pull in the facade. It appears to me that without some sort of increased axial loads the amount of column deformation would not lead to the large IB and buckling. This is a guess... I don't know how out of "true" a column assembly like the twin towers could be and perform ...ie not buckle.
We do know that not very long after the IB the whole top descended and this is a clear sign that axial support was below service loads... whether from loss of strength, alignment or both.
We do know that not very long after the IB the whole top descended and this is a clear sign that axial support was below service loads... whether from loss of strength, alignment or both.