Standard EUMOS 40509:2020
Test Method for Load Unit Rigidity
This normative describes a test method to quantify the rigidity of a load unit in a specified direction when subject to an inertial force in that direction. EUMOS 40509:2020 is a revision of 40509:2012 adding new elements to the evaluation method for more precise results. This normative also addresses some relevant minimum requirements for test equipment, acceptance criteria, reporting and certification. This normative is especially relevant to quantify the effectiveness of transport packaging in preventing deformation or relative shifting of cargo in the load unit resulting in an elastic and even permanent deformation of the load unit itself. The cause of these deformations of the load unit is a horizontal inertial force as occurs during transport, especially road and rail transport. Air and Ocean may cause substantial additional inertial forces in the vertical direction. Therefore, the conclusions of this test method are more relevant to road and rail freight. The background concept for this test is a limited acceptable elastic and permanent deformation, as an effect of a controlled acceleration force. The effective acceleration force on each piece of cargo in the load unit during transport can be slightly different in magnitude and can be shifted in time. Therefore, the load unit rigidity in each direction is expressed as the maximum acceleration of the loading platform in that given direction that does not cause unacceptable deformation nor unacceptable relative movement. This maximum acceleration is expressed as a fraction ¿k¿ value of g with g the gravitational acceleration. Examples: 0.2 g, 0.5 g, 0.7 g, this normative is limited to accelerations in any direction up to 2 x g.