ʻOihana kilahe hale i haku ʻia me nā mea kila a ʻo ia kekahi o nā ʻano hale nui. Hoʻokumu nui ʻia ka hale i nā kaola kila, nā kolamu kila, nā pahu kila a me nā mea ʻē aʻe i hana ʻia i nā ʻāpana kila a me nā papa kila, a hoʻohana i ka silanization, ka manganese phosphating maʻemaʻe, ka holoi ʻana a me ka hoʻomaloʻo ʻana, galvanizing a me nā kaʻina hana pale ʻē aʻe. Hoʻohui pinepine ʻia nā ʻāpana a i ʻole nā mea e nā welds, bolts a i ʻole rivets. Ma muli o kona kaumaha māmā a me ka hana maʻalahi, hoʻohana nui ʻia i nā hale hana nui, nā wahi, nā hale kiʻekiʻe kiʻekiʻe, Bridges a me nā māla ʻē aʻe. He mea maʻalahi ke kila kila, ʻo ka hale kila maʻamau e wehe i ka ʻōpala, galvanized a pena paha, a me ka mālama mau.