Tsarin ƙarfeana amfani da su sosai a cikin manyan gine-gine, manyan masana'antu, tsarin sararin samaniya mai tsayi, tsarin ƙarfe mai haske, da gine-ginen zama. A manyan hanyoyin mota da na dogo gadoji, thermal power main shuke-shuke da tukunyar jirgi na karfe Frames, watsawa da canji hasumiya, rediyo da talabijin hasumiyai, da tekun mai dandali, nukiliya ikon samar da iska, ruwa conservancy yi, karkashin kasa tushe karfe sheet tara, da dai sauransu. Gine-ginen birni yana buƙatar babban adadin tsarin ƙarfe, kamar hanyoyin jirgin ƙasa, hanyoyin jirgin ƙasa na birni, wucewar wucewa, gine-ginen muhalli, wuraren jama'a, gine-ginen wucin gadi, da sauransu. Bugu da ƙari, tsarin ƙarfe kuma ana amfani da shi sosai a cikin ƙananan sassa masu nauyi kamar manyan kantunan kantuna. zane-zane, zane-zane mai murabba'i, sassaka sassaka da wuraren baje kolin wucin gadi.