many tower crane on top of a big building in construction work, there`re moving machine on top floor, scaffolding on each story

aerial apartment architecture armbeam blue builder building business city civil concrete condominium construction consultant crane development engineer engineering equipment estate floor foundation high house industrial industry landscape machine machinery materail modern move net new precast prefab project property protection real residential scaffolding site sky skyscraper slab steel story structure tall technology top tower town urban view wire work worker working