Fekthering ea rona ea ho etsa ente, re sebetsa ka thata ho hlahisa liforomo tsa polasetiki tsa boleng bo holimo tse etselitsoeng ho nepahala le ho tšoarella. Mefuta ea rona e etselitsoe ho sebetsana le litlhoko tse thata tsa ho lahla konkreite, ho netefatsa liphetho tse tsitsitseng le tse nepahetseng ka ts'ebeliso e 'ngoe le e' ngoe.

E entsoe ka lipolasetiki tse matla, tse sebetsang hantle, hlobo ea rona ea konkreite e fana ka ts'epo ea nako e telele le boiketlo ba tšebeliso. Ebang ke bakeng sa ho haha, ho khabisa naha, kapa ho khabisa, re fana ka litharollo tse hlophisitsoeng tse ntlafatsang katleho le boleng ba ts'ebetso ea hau ea tlhahiso ea konkreite.