How do you support upper floors in tall buildings? When I build a skyscraper out of LEGO and the floor above is weak do I remove the flooring from above and a pillar underneath and then put the floor back or something?
Extra support in form of pillars/walls underneath (remember that also weighs something and as such should be supported) is one (and probably the most widely used) solution, another would be to build the floor thicker, and depending on how weak the floor is and how much it has to support yet another solution might be to just not care.