Ramin ƙarfafa welded wanda kuma aka sani da ƙarfafawar waya mai walda, wani nau'in ƙarfafa raga ne.Ƙarfafa raga shine ingantacciyar inganci, tattalin arziƙi da sassauƙa don ƙarfafa kankare, yana adana lokacin gini sosai da rage ƙarfin aiki.Ana amfani da shi sosai wajen gina titina da babbar hanya, injiniyan gada, rufin rami, ginin gidaje, bene, rufin, da bango, da sauransu.