Ƙarfafa raga kuma an san shi da welded karfe raga, welded karfe raga, welded karfe raga, welded karfe raga, karfe raga, da dai sauransu. Rago ne wanda a cikinsa an shirya sandunan ƙarfe na tsaye da sandunan ƙarfe masu jujjuya su a wani ɗan lokaci kuma a kusurwoyi daidai. ga juna, kuma duk intersections an welded tare.