Akụkụ oghere bụ ihe nke ụfọdụ geometry mere nke ígwè ma ọ bụ ígwè na ihe nwere ụfọdụ ike na ike (dị ka plastik, aluminum, fiber glass, wdg) site na ntụgharị, extrusion, nkedo na ihe ndị yiri ya. Gụnyere nchara nchara, nchara ọwa, I-beam, square steel, H-beam, wdg bụ ihe nke ụfọdụ geometry mere nke ígwè ma ọ bụ ígwè na ihe nwere ụfọdụ ike na ike (dị ka plastik, aluminum, eriri iko. , wdg) site na ịtụgharị, extrusion, nkedo na ihe ndị yiri ya. Gụnyere akụkụ ígwè, ọwa ígwè, I-beam, square ígwè, H-beam, wdg.