Pahu wai hao hao haoʻO ke kila kalapona māmā kiʻekiʻe o ka Q235 B a i ʻole ka papa Q345, me ka palekana, kūpaʻa, anti-corrosive, shockproof, a me ke ōlaʻi.
ʻO ke alahaka kila he alahaka nona ka mea nui e lawe ai i ke kila, ua hoʻohana ʻia i ke kahua o ka mākaukau kaua kaua aupuni a me ka ʻenekinia halihali.