Guardrail ntupu / nsu ntupu na-akpọkwa nsu, nsu na etiti ntupu. Guardrail ntupu na-eji guardrail nchedo okporo ụzọ, ụgbọ okporo ígwè, ọdụ ụgbọ elu, residential ebe, ọdụ ụgbọ mmiri na docks, ubi, ozuzu, anụmanụ na-azụ, wdg O nwere àgwà nke mgbochi corrosion, mgbochi ịka nká, anyanwụ iguzogide na ihu igwe na-eguzogide. Ụdị mgbochi corrosion dị n'elu nke ebe nchekwa na-agụnye electroplating, plating na-ekpo ọkụ, spraying plastic na ntinye rọba.