Chotchinga chamsewu waukulu chimapangidwa makamaka ndi zitsulo zamapangidwe achitsulo ndi mayamwidwe amawu ndi gulu lotsekereza.Mzerewu ndi chigawo chachikulu chonyamula katundu chotchinga phokoso, chomwe chimakhazikitsidwa pamsewu wotsutsana ndi kugundana kapena mbale yachitsulo yomwe ili pambali pa njanji ndi ma bolts kapena kuwotcherera;Bokosi lokhala ndi phokoso komanso phokoso ndilo gawo lalikulu la phokoso, lomwe limakhazikika muzitsulo za H-mawonekedwe a H kupyolera mu kasupe wapamwamba kwambiri kuti apange chotchinga chomveka.