Isinyithi kunye nentsimbi i-slag inokwahlulwa ibe yi-Blast ye-Slast Stog kunye ne-Steelmenking Slag. Kwisandla sokuqala, umntu wangaphambili uveliswa kukunyibilika kunye nokuncitshiswa kwentsimbi kwi-uqhubs. Kwelinye icala, enye yenziwa ngexesha lenkqubo yokuthambisa ngokutshintsha ukwakhiwa kwesinyithi.