Would you build a mansion by putting in the skylights first, using hacked together scaffolding to hold the skylight in place while others work on putting up walls, only to rip it all down again in order to put the foundation in?? Or would you lay a solid foundation, put up solid walls, add on a nice solid roof, and then put in the skylight?
I know you are going to hate me for this but: http://www.emporis.com/en/wm/bu/?id=standardbankcentre-johannesburg-southafrica In particular: - This tower was built from the top down, meaning that after the central core was built, the floors were suspended from three cantilevered arms with the top floors added first, followed by each lower floor. Sorry I couldn't resist.