Kuunza yedu nyowani inodzorereka yekudonha yekusunga, yekupedzisira yekuchengetedza mudziyo wekushanda pakakwirira. Ichi chibatiso chekudonha chakagadzirirwa kupa kuchengetedzwa kwakanyanya, kubvumira vashandi kuita mabasa avo nechivimbo uye rugare rwepfungwa.
Retractable fall arresters dzakanyatsogadzirirwa kumisa vashandi kubva pakudonha muchiitiko chekudonha kamwe kamwe. Kunyangwe iwe uri kushanda panzvimbo yekuvaka, telecommunications tower kana chero chimwe chimiro chakakwirira, ichi chinosunga chinodonha chinokuchengetedza kubva kune njodzi dzinogona kuitika. Icho chikamu chakakosha chechero nzira yekudzivirira yekudonha sezvo ichinyatso kudzikisa njodzi yekukuvara kwakakomba kana kufa.
Ichi chidziviriro chekuchengetedza chidziviriro chinogadzirwa kubva kumhando yepamusoro, yakasimba zvinhu zvinomira kuoma kwenzvimbo yebasa. Chimiro chayo chinodzoreredza chinobvumira rusununguko rwekufamba kana uchishanda pakakwirira, uchiri kuona nekukurumidza uye kunoshanda mhinduro muchiitiko chekudonha. Iyo nzira inodzoreredzwa inongowedzera nekudzoreredza, ichipa huwandu hwakakodzera hwekunonoka pazvinenge zvichidikanwa uye kudzivirira kuterama kwakanyanyisa kunogona kukonzeresa tangles kana njodzi dzekugumburwa.