Home › Forums › Discussion Forum › Engineering Prof releases draft report on 9/11 collapse of WTC Bldg 7 in NYC › Reply To: Engineering Prof releases draft report on 9/11 collapse of WTC Bldg 7 in NYC
Just watch the collapse videos. You can see the descending, accelerating front of dusty air ejected by the avalanche of concrete floor systems confined within the perimeter columns. It races ahead of the second wave of collapse (namely the toppling of perimeter sections), and the huge dust cloud wells out as it reaches ground. All just what you’d expect from progressive collapse of the concrete floor systems, all just as predicted by Newton’s laws.