Tulin takardar karfe mai siffar Uwani nau'i ne na tulin karfe wanda ke da sifar giciye mai kama da harafin "U".Ana amfani da shi sosai a aikin injiniyan farar hula da ayyukan gine-gine don aikace-aikace daban-daban, kamar riƙon bango, ɗakunan ajiya, tallafin tushe, da sifofin ruwa.
Daki-daki na tarin tulin karfen U-dimbin yawa yawanci ya haɗa da dalla-dalla masu zuwa:
Girma: Girma da girma na tari na karfe, kamar tsayi, nisa, da kauri, an ƙayyade bisa ga buƙatun aikin.
Kaddarorin sassan-giciye: Maɓallin kaddarorin tulin takardar ƙarfe na U-dimbin yawa sun haɗa da yanki, lokacin rashin aiki, modulus sashi, da nauyi kowane tsayin raka'a.Waɗannan kaddarorin suna da mahimmanci don ƙididdige ƙirar tsari da kwanciyar hankali na tari.