is a type of steel piling that has a cross-sectional shape resembling the letter “U”. Isetshenziswa kakhulu kumaphrojekthi wobunjiniyela bomphakathi kanye nokwakha izicelo ezahlukahlukene, njengokugcina izindonga, ama-cofferdams, ukusekelwa kwesisekelo, kanye nezakhiwo zamanzi.