5.1 Mechanical propertiesThe mechanical properties must due to the requirements of IEC 61061-3-1 and IEC 61061-3-2(beech veneers). The sample pretreatment has to be carried according to IEC 61061-2 section 3.The maximal tolerable decrease of minimum flexural strength perpendicular to laminations by 90 0 Ccomparing to the requirements on room temperature according IEC 61061-3-1 is 40 %.The maximal tolerable decrease of minimum apparent modulus of elasticity in flexure perpendicular tolaminations comparing the requirements on room temperature according IEC 61061-3-1 is 35 %.