1. Hoʻokumu ʻia i ʻelima mau ʻōnaehana nui: ʻōnaehana hydraulic, ʻōnaehana kaomi ʻana i ka ea, ʻōnaehana vacuum, ʻōnaehana mokuahi a me ka ʻōnaehana mana aunoa.
2. ʻO ka palekana interlock triple e hōʻoia i ka palekana.
3. 100% X-ray inspection e hōʻoia i ka maikaʻi o ka huahana.
4. ʻO ka mana piha piha, ka mana kūpono o ka mahana a me ke kaomi, mālama i ka ikehu.