Tus choj tiv thaiv pov tseg net muaj ntau yam kev siv thiab tuaj yeem siv los ua lub laj kab kev loj hauv kev sib cais. Nws tsuas yog siv cov hlua hlau zoo li cov khoom siv, thiab cov khoom siv mesh yog galvanized thiab pvc-coated, uas muaj cov yam ntxwv ntawm kev tiv thaiv corrosion thiab tiv thaiv ultraviolet ntev.