The ECT value obtained through testing with the ECT Tester reflects the rigidity of the CFB box. This value can be used to compare the quality of different CFB boards. Moreover, it's possible to determine the compression strength of the CFB box using McKee's formula:
Compression Strength = K * ECT * T * Z
Where:
K = Constant
ECT = Edge Crush Test Value
T = Thickness of CFB board (wall thickness)
Z = Perimeter of the box (2 L + 2 W)