catogery                    model(high*width)   

HW/HM/HN/HP           100*100

                                  125*125

                                  150*150

                                  175*175

                                  200*200

                                  250*250

                                 300 *300

                                 350*350

                                 400*400

                                 500*300

                                 900*300

steel profiles-steel H-beams