[BC] Strong buildings vs open space

[Robert Meuser]

Mike McCarthy wrote:

>
> Sears Tower and John Hancock, as well as most other tall buildings 
> here in Chicago do not follow that design philosophy.  Only the AON 
> building here has open floors.  But the building is also a much 
> smaller building and made totally of steel reinenforced concrete. Not 
> open face steel.  All the major buildings here have multiple columns 
> in the buildings inside the outer perimeter.  In fact, Sears is made 
> of 9 very independent columns mated together for rigidity.
>

I was looking at the Sears tower when I was in Chicago last year. No way 
would that have come down like the WTC.  There is a reason Chicago is 
the home of American architecture.

R