That is the neat thing with Intamin Giant Drop Tracks, they can be tacked onto just about anything that can support the weight.
The one in london was loosely attached to a roof column(I say loosely as it also had alot of support of it's own, and it was one hell of a drop with clearances you wouldnt believe)
Intamin brochure says (and shows in a drawing) that you can attach a giant drop track to the outside of a building. I think owners of tall SkyScrapers should look into that
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073
I do think one of the 9 Columns of the Sears tower does go from the ground to the very top(having trouble though picturing in my mind each of the 9 columns though, I think one is on the outside)
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073
Two kiddie corners drop off about halfway up. Then the other two corners drop off (so you're left with a + ). Then three of the outside columns drop off, leaving you with the center column and an outside column at the top.
Though Giant Drop on a glass building without much supporting the exterior of the building probably wouldnt be ideal for this application, but we can all dream
Amoco Building would be nice also(and pheasable, exept for the cost and I'm sure lack of interest by the owners)
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073