Loaʻa i ka hana girder precast nā pono o ke kiʻekiʻe o ke ʻano, ka maʻalahi o ke kūkulu ʻana, ka hiki ke huki hou ʻia, ka maʻalahi o ka wehe ʻana a me ka hana maʻalahi. Hiki ke hāpai ʻia a kauō ʻia paha i kahi hoʻolei ʻana me ka hoʻohui ʻia, a hiki ke wehe ʻia me ka hoʻohui ʻia a i ʻole ka ʻāpana ma hope o ka loaʻa ʻana o ka ikaika o ka sima, a laila e huki i waho i ka ʻōmole o loko mai ka girder. He mea maʻalahi ke kau ʻana a me ka debugging, haʻahaʻa ka ikaika o ka hana, a kiʻekiʻe ka pono.
Ua māhele ʻia ke alahaka viaduct i nā ʻāpana liʻiliʻi, i hana mua ʻia ma ka pā hoʻolei mana maikaʻi, a laila, hāʻawi ʻia e hoʻokomo ʻia e nā lako kūkulu maikaʻi.