U-section karfe wani nau'i ne na karfe tare da sashin giciye kamar harafin Turanci "U".Babban halayensa shine babban matsin lamba, dogon lokaci na tallafi, sauƙin shigarwa da sauƙi na lalacewa.Ana amfani da shi musamman a titin ma'adanan, tallafi na biyu na titin nawa, da tallafin rami ta tsaunuka.