With the Single Column Testing Framework, designed to quickly and accurately determine 4-Point Flexural Stiffness of standard corrugated cardboard samples according to ISO 5628. Flexural Stiffness is the relationship between the Flexural moment applied to a normalized sample according to ISO 5628 and the Deflection within the elastic zone. The Flexural Stiffness of Corrugated Cardboard is of great importance to achieve great resistance to Stacking, BCT, in the corrugated cardboard box. What primarily determines this flexural stiffness of corrugated cardboard is the mixture of the thickness of corrugated cardboard and the tensile strength of Liner Papers.