simbi mapepa mirwi anoshandiswa zvakanyanya muminda yakawanda senge hwaro gomba rutsigiro, kusimbiswa kwebhangi, kuchengetedzwa kwemadziro egungwa, kuvaka wharf uye engineering yepasi pevhu. Nekuda kwehukuru hwayo hwekutakura, inokwanisa kushingirira kutarisana nedzvinyiriro yevhu uye kudzvanywa kwemvura. Mutengo wekugadzira wekupisa-yakaputirwa simbi simbi murwi wakaderera, uye unogona kushandiswa zvakare, uye une hupfumi hwakanaka. Panguva imwecheteyo, simbi inogona kushandiswa zvakare, maererano nemafungiro ekusimudzira. Kunyangwe iyo inopisa-yakatenderedzwa simbi murwi pachayo ine kumwe kusimba, mune dzimwe nzvimbo dzinoita ngura, anti-corrosion kurapwa senge coating uye inopisa-dip galvanizing inowanzo shandiswa kuwedzera hupenyu hwesevhisi.