In refrence to the weights in the top of the building, I think episode 4 of the first season of Numb3rs deals with a building being unstable when the wind struct the building at a certain angle. The solution, if memory serves me, was to add the system of moving weights on the roof.
Just a possiblility, remember one years hint was "a shovels show" in refrence to Davis Spade of just shoot me.
