Based on the geometry of the concrete section, the software automatically disables (grey) those combinations that cannot be placed due to the available space. Note that the maximum number of Sika® Carbodur® layers that can be displayed is 3, and the minimum distance to the edge of the beam should equal the concrete cover of the internal steel reinforcement (fib Bulletin 14, sections 7.2.1.1 and 7.2.1.2). The maximum number of SikaWrap® layers that can be displayed is 5.