Here is what the world's largest drill bit..............er, I mean Chicago Spire would have looked like.
$1 billion seems like it would have been pretty low budget for this size of building in the U.S.
Here is what the world's largest drill bit..............er, I mean Chicago Spire would have looked like.
$1 billion seems like it would have been pretty low budget for this size of building in the U.S.
More like a busted bolt “easy out”. Notice the reverse threads.