the foundation of the building is deep. it was built with 192 columns being put into the ground. each column was in diameter and long. of steel rebar was used in the construction of the tower. it took 22 million man-hours to build. a high density, low permeability concrete was used in the foundations of burj khalifa. a cathodic protection system is used to lessen any bad effects from corrosive chemicals in local ground water.