1.Reinforced bead design awade ibu loading ike, nke kwesịrị ekwesị maka obere anya na Ngwuputa na agwakọta ụzọ.
2.Transverse nnukwu blocks ụkpụrụ imewe na-enye magburu onwe ya ala adịgide na ịrị elu ike.
3.Na-enye iguzogide ịdọka na ịkụ ọkpọ n'okporo ụzọ siri ike, nke na-eme ka taya ndụ dịkwuo ogologo.