I hope this doesn't come off to many of you skyscraper experts as a dumb question, and I am sure it has been asked before, but hopefully you can enlighten a novice such as myself..
Just curious, exactly what type of structure is 1wtc? I know the old twin towers were tubular, and their strength came from the outside columns which acted as bracers, like a stick of celery. The old towers got most of their strength from the outside columns, and did not have many interior columns so as to free up more office space..1WTC looks to have an-all glass facade. Does it have a rigid steel skeleton as well on the exterior? I know it has strong interior concrete reinforced columns and beams? I heard somewhere that 1wtc's exterior facade is merely superficial, that it gets its strength from the interior, unlike in the old twin towers. Is this more akin to older skyscrapers like the ESB? Thanks.