I kēia mau lā aku nei, ua kipa aku kahi hui o nā mea kūʻai aku ma Brazil i kā mākou hale hana hoa no kahi nānā ma ka pūnaewele, e kālele ana i nā kūkākūkā hohonu e pili ananā huahana culvert corrugated galvanizeda me ke kaʻina hana uhi anti-corrosion. Ua hele pū kā mākou limahana me nā mea kūʻai aku ma o kā lākou huakaʻi ʻana i ke keʻena a me ka wahi hōʻikeʻike, ka hale hana hana maʻamau, a me ka hale hana pena pena kūikawā. Ma o ka nānā ʻana ma ka pūnaewele, nā haki ʻana o ke kaʻina hana, a me nā hālāwai nīnau a me nā pane maka-a-maka, ua loaʻa i nā mea kūʻai aku kahi ʻike piha o kā mākou mau kūlana hana huahana a me nā kaʻina hana hoʻomalu maikaʻi koʻikoʻi.

Ua komo hohonu nā mea kūʻai aku i loko o nā hale hana hana koʻikoʻi e nānā pono i ke kaʻina hana holoʻokoʻa o nā paipu culvert galvanized.Mai ke koho ʻana i nā pepa kila galvanized a me ka hoʻokumu pololei ʻana a hiki i ka hoʻokaʻawale ʻana i ka huahana hope loa, ua hāʻawi kā mākou limahana i nā wehewehe ma ka pūnaewele no nā pono kūlohelohe o ka substrate galvanized., a me ke kūpaʻa o ke kūkulu ʻana a me ka ikaika compressive o nā huahana i hoʻopau ʻia, e hōʻike piha ana i ka maikaʻi o nā huahana i kūpono no nā papahana ʻōnaehana like ʻole e like me nā alaloa, nā tunnels, a me ka mālama wai.