Flat Crush Test of Corrugated Board
(Flexible Beam Method), Test Method T 808 cm-25
The flat crush test (1) is a measure of the resistance of the flutes in corrugated board to a crushing force applied
perpendicular to the surface of the board under prescribed conditions. The test is satisfactory for single-faced or single
wall (double-faced) corrugated board, but not for double-wall or triple-wall corrugated board or other complex
corrugated structures, because of lateral motion of the central facing or facings.