Fenzi yeConcertinayave ichizivikanwa senzira ine simba kwazvo yekudzivisa kupinda kwevavengi kana mhuka dzisingadiwi. Mapadza akapinza uye chimiro chedenderedzwa zvinogona kubata chero munhu anoda kupfuura kana kupfuura waya yekonsati.
Kazhinji, fenzi yekontina musanganiswa wewaya yekontina nefenzi yeketani kana welded wire mesh inongovhara vanhu uye haizokuvadzi (ona Mufananidzo 1). Rudzi urwu rwefenzi yekontina runowanikwa zvakanyanya mujeri, panhandare yendege, mudzimba dzekugara, muhurumende nemunzvimbo dzekutengeserana.
Rumwe rudzi rwemafenzi econcertina runosanganisira waya dzinotenderera dzeconcertina. Kune rumwe rutivi, dzinogona kusungirirwa pachimiro chesimbi kuti dzigadzire fenzi yekuchengetedza (ona mufananidzo 2). Kune rumwe rutivi, dzinogona kuiswa pasina chimiro chesimbi (ona mufananidzo 3).