AlRajhi showroom in Riyadh is four floor building with an area per floor of 4000 Square meters, the challange in the design of the concrete floors with spans up to 15.00 meters, the second is the design of vertical elments thats due Arch. requirements some of the columns didn't run vertically through the building, forced the designers to use transfer beams or slabs, the post tension worked well with the system to reduce the overall deflection of the structure and elements design on flexible supports such as planted columns has been enhanced due to lower deflection happened in the floor