Assignment of characteristics ================================ For these elements of 1D structures, it is necessary to assign geometric characteristics that are complementary to the mesh data. These data are defined with the AFFE_CARA_ELEM command associated with the following factor keywords: * **POUTRE** Allows you to define and assign the characteristics of the cross section. * **ORIENTATION** Allows you to define and assign the main axes of the cross sections of beam-type elements.