Under normal conditions when a man exerts a pull of 70 lb when backing up a wire, each turn round a bollard reduces the strain required on the hauling part to one-quarter of the load, so that one man will be able to hold: one-eighth of a ton with one turn, half a ton with two turns, two tons with three turns, and eight tons with four turns.
Phantsi kweemeko eziqhelekileyo xa indoda itsala intsontelo enobunzima obungama-70 lb xa incedisa ucingo, umjikelezo ngamnye okwintsika ekubotshelelwa kuyo intambo yenqanawa unciphisa uxinzelelo olufunekayo ekutsaleni luya kwikota enye yomthwalo, nto leyo ebangela ukuba indoda enye ikwazi ukumelana noku: isinye kwisibhozo setoni ngomjikelezo omnye, isiqingatha setoni ngemijikelezo emibini, iitoni ezimbini ngemijikelezo emithathu, kunye neetoni ezisibhozo ngemijikelezo emine.