While I agree with SLS that if it's engineered properly it won't be an issue, Falling Water is not the photo I would have posted as an example of great engineering. While that building looks nice, they just spend a huge sum of money fixing all the structural and water infiltration issues it had. FLW was a genius when it came to making houses look nice, but he sucked in the detailing department- not unlike many of the other signature architects out there (Frank Gehry comes to mind immediately).