Quote:
Originally Posted by hammersklavier
Yes, buildings designed for overbuilding are overengineered in their initial phases where the tower pads are meant to be. They are deliberately built with the foundations, footings, and internal infrastructure necessary to support later additions. This is a calculated risk, as it may take generations (see the Gallery) for overbuilding to occur. However, if -- and this is an if for me as I haven't seen the site plans yet, but this is what Summersm was reporting -- the building is designed for an overbuild, it is also a statement of faith on Brandywine's part that the market will demand a more intensive use on this parcel sooner than the building's natural replacement cycle (at which point raze-and-replace becomes viable).
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One question I've always wondered about is the additional cost for, lets say, building a 15 story building so an additional 15 stories can be added in the future. Penn did that with the HUPP admin building. Besides making certain items stronger, like the foundations and columns, some would need to be sized larger, like drain pipes and fire systems. But what about elevator shafts? I think adding them in the future through the lower floors that were already being used, would be a big expense and a royal pain in the ass for everyone. But what do you do with 2 or 3 unused shafts, use them as closets?