Posachedwapa, gulu la makasitomala aku Brazil linapita ku fakitale yathu yogwirizana nayo kuti akaione pamalopo, poyang'ana kwambiri zokambirana zakuya zokhudzazinthu zopangidwa ndi galvanised corrugated culvertndi njira yotetezera dzimbiri. Antchito athu anatsagana ndi makasitomala paulendo wawo wonse woyendera ofesi ndi malo owonetsera zinthu, malo ochitira zinthu okhazikika, komanso malo ochitira zinthu opaka utoto wapadera. Kudzera mu kuyang'anitsitsa pamalopo, kusanthula njira, komanso mafunso ndi mayankho pamasom'pamaso, makasitomala adamvetsetsa bwino miyezo yathu yopangira zinthu komanso njira zowongolera khalidwe.

Makasitomala adapita mozama kwambiri ku malo ochitira misonkhano yopangira zinthu kuti aone momwe ntchito yonse yopangira mapaipi opangidwa ndi galvanised corrugated culvert imachitikira.Kuyambira kusankha mapepala achitsulo opangidwa ndi galvanized ndi kupangidwa molondola mpaka kusankha zinthu komaliza, antchito athu adapereka kufotokozera komwe kuli ubwino wa galvanized substrate womwe sungathe kudzimbidwa., komanso kukhazikika kwa kapangidwe kake ndi mphamvu yolimba ya zinthu zomalizidwa, zomwe zikuwonetsa bwino kuti zinthuzo ndi zabwino kwambiri pa ntchito zosiyanasiyana monga misewu ikuluikulu, ngalande, ndi malo osungira madzi.