22-05-2011, 05:26 AM
In fact, the design of the twin towers would not result in a tangled mass being arrested and supported by the columns. WRONG!
The twin towers design off the long span column free interiors were what enabled the floors being swept away and destroyed by the destructive mass descending on them.
I am not asserting the floors turn into tanks.. but the mass of broken floors and contents had the destructive mass of a tank and more.
In order for columns to support loads the loads must be applied to the columns in a manner that the column can support the load and the connect to it is strong enough. The loads were attached to the columns in the core via beam stubs which were designed to transfer a specific load with appropriate safety factor. If a core column descended on a beam stub it would destroy it and the beam stub would NOT be able to transfer the weight of the descending column to the column to which it was affixed. Sure if a refrigerator dropped onto the beam stub it would be mangled and come to rest and that beam stub would not fail and the refrigerator load WOULD be transferred to the column it was attached to. But in the collapse of the debris.. the beam stubs, truss seats, bracing was over come by the dynamic loads and RIPPED off or fractured and were severed from and unable to transfer loads to columns and the columns were therefore UNABLE to arrest the descent of the huge loads of collapsing floor rubble.
Sorry Charlie, you can't describe how to get those loads onto those strong columns in such a scenario. You are dreaming!
The twin towers design off the long span column free interiors were what enabled the floors being swept away and destroyed by the destructive mass descending on them.
I am not asserting the floors turn into tanks.. but the mass of broken floors and contents had the destructive mass of a tank and more.
In order for columns to support loads the loads must be applied to the columns in a manner that the column can support the load and the connect to it is strong enough. The loads were attached to the columns in the core via beam stubs which were designed to transfer a specific load with appropriate safety factor. If a core column descended on a beam stub it would destroy it and the beam stub would NOT be able to transfer the weight of the descending column to the column to which it was affixed. Sure if a refrigerator dropped onto the beam stub it would be mangled and come to rest and that beam stub would not fail and the refrigerator load WOULD be transferred to the column it was attached to. But in the collapse of the debris.. the beam stubs, truss seats, bracing was over come by the dynamic loads and RIPPED off or fractured and were severed from and unable to transfer loads to columns and the columns were therefore UNABLE to arrest the descent of the huge loads of collapsing floor rubble.
Sorry Charlie, you can't describe how to get those loads onto those strong columns in such a scenario. You are dreaming!