ʻO nā kūlana hana o nā excavators, bulldozers, crawler cranes a me nā mea hana ʻē aʻe i nā mīkini hana ʻoi aku ka paʻakikī, ʻoi aku ka paʻakikī.nā mea koloi ka ʻōnaehana hele wāwae ma ka hana pono e kū i ka ʻoi aku ka ʻoi aku o ka haʻalulu a me ka hopena. No ka hoʻokō ʻana i nā waiwai mechanical o ka mea kolo, pono ia e hana i ka hoʻomaʻamaʻa wela e like me ka mālama ʻana i ka wela, ka forging, ka hoʻolei ʻana a me nā kaʻina hana ʻē aʻe ma nā ʻāpana he nui i hana i ka mea kolo. ʻO nā kaʻina hana wela i ʻōlelo ʻia ma luna nei, ʻo ia nā ʻano hana hoʻoikaika ikaika. No laila, ua lilo ka hoʻohana ʻana i ka ikehu hou, ka ʻenehana hou, a me ka ʻenehana i hoʻopaʻa ʻia i mea nui e hoʻomaikaʻi mau ai i ka hana huahana a hoʻemi i nā kumukūʻai hana, ʻoiai e hoʻomaikaʻi mau ana i ke ola lawelawe huahana. E lilo i ala kūpono e mālama ai i ka ikehu.