Tell me again how damaging ONE TRUSS could have brought down WTC 7 [View All]

[Ghost in the Machine]

In November 1988, Salomon Brothers withdrew from plans to build a large new complex at Columbus Circle in Midtown and agreed to a 20-year lease for the top 19 floors of 7 World Trade Center.<23> The building was extensively renovated in 1989 to accommodate the needs of Salomon Brothers.<24> Most of three existing floors were removed as tenants continued to occupy other floors, and more than 350 tons (U.S.) of steel were added to construct three double-height trading floors. Nine diesel generators were installed on the 5th floor as part of a backup power station. "Essentially, Salomon is constructing a building within a building - and it's an occupied building, which complicates the situation," said a district manager of Silverstein Properties. The unusual task was possible, said Larry Silverstein, because it was designed to allow for "entire portions of floors to be removed without affecting the building's structural integrity, on the assumption that someone might need double-height floors."

http://en.wikipedia.org/wiki/7_World_Trade_Center#Tenants

So, they could remove entire sections of floors without compromising structural integrity, but one truss could cause the whole building to collapse??