Mtedza zosapanga dzimbiri hex ntchito molumikizana ndi akapichi ndi zomangira kulumikiza ndi kulumikiza mbali. Pakati pawo, Type 1 mtedza wazinthu zisanu ndi chimodzi ndiwo omwe amagwiritsidwa ntchito kwambiri. Mtedza wa Giredi C umagwiritsidwa ntchito pamakina, zida kapena zomangamanga zokhala ndi malo olimba komanso zosafunikira kwenikweni. Mtedza wa Class A ndi Class B umagwiritsidwa ntchito pamakina, zida kapena nyumba zokhala ndi malo osalala komanso zofunikira kwambiri. Makulidwe ake amtundu wa 2 mtedza wokhala ndi mbali zinayi ndi wandiweyani, womwe umagwiritsidwa ntchito nthawi zambiri pomwe kusonkhanitsa ndi kutaya nthawi zambiri kumafunika.