fuck off you disgusting deadbeatBULLSHITThe steel went up to 7 floors over the top of the concrete in WTC 1 and perhaps as many as 12 floors in WTC 2.
why do you lie so much??
concrete goes up FIRST
Lying moron agents supporting secret methods of mass murder and treason.
WTC 7 was rebuilt with a concrete core.
STRUCTUREmag: Concrete Construction at 7 World Trade Center
Having chosen the system, Tishman Construction compared the pros and cons of constructing either the concrete core or structural steel first. An additional factor to be considered, as noted by Allan Paull, was the fact that the labor union in New York City does not allow concrete construction to be performed above steel workers. The steel-first approach was chosen based on the following advantages: expedited construction of the mechanical/electrical work, simplified building hoist, simplified crane logistics, expedited curtain wall construction, and a reduced overall construction schedule and cost.
pay your fucking child support
and, dipshit, the steel first approach is the way it was done
and thats talking about the NEW buildings, not the OLD
you have to have the STEEL up before you can pour concrete around it
you are a fucking delusional fucktard
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