Preferences > structural > ok. Pre - processor > element type > add/edit/delete > add > shell > 3D - 4 node 181 > ok > close. Pre - processor > material properties > material model > structural > linear > elastic > isotropic > enter (EX = 50, PRXY = 0.49) > ok > materials > exit. Pre - processors > sections > shell > lay-up > add/edit > enter "thickens = 1 > ok. Pre - processor > modelling > create > key points > in active cs > enter the below co-ordinates. Key point No X - location Y - location Z - location 1 0 0 0 Apply 2 10 5 0 Apply 3 10 15 0 Apply 4 0 5 0 apply 5 0 15 0 Ok Pre - processor > modeling ...