1. Ọnụọgụ dị ukwuu nke isi, usoro mgbochi mmiri kpọrọ nkụ niile, enweghị mmanụ e ji emeju ihe, dị ọcha ma dị ngwa n'oge a na-arụ ya, ọ dịghịkwa emetụta gburugburu ebe obibi gbara ya gburugburu.
2. Mgbakwunye etiti nke eriri plastik e ji iko modulus mee ka ọ sie ike (FRP).
3. Ihe mkpuchi teepu ígwè a kpuchiri n'akụkụ abụọ nke e ji ihe nkiri kpuchie ogologo oge nwere ike ime ka ike nrụgide dị n'akụkụ nke eriri anya ka mma nke ọma.