ADOPTED_FROM:EN 1156:2013 This European Standard specifies a method of determining in a constant climate both a duration of load factor and a creep factor for wood based panels stressed in flatwise bending with and without a shear component. Details of an alternative but provisional method employing medium sized test pieces are given in Annex A; this method can also be used for test pieces loaded under varying climates. NOTE The duration of load factor is necessary to modify the characteristic strength values obtained in short term structural tests in order to derive long term values. The creep factor obtained in the test is used to predict a long term deflection from the initial elastic deflection.