Question #486
Unless otherwise specified by the manufacturer, what reduction in rope diameter is permissible due to wear of the outer layer of wires?
O ile producent nie określa inaczej, ile wynosi dopuszczalne zmniejszenie średnicy liny ze względu na wytarcie zewnętrznej warstwy drutów?
a
up to 3%
do 3%
b
10%, but no more than 5 mm
10% ale nie więcej niż 5mm
c
up to 15%
do 15%
d
up to 7%
do 7%
Correct answer
Why?
The limit in this question is 7% of the nominal rope diameter (średnica nominalna liny). This concerns the whole rope, not an individual wire. A 15% reduction already represents excessive wear, even if no broken wires are visible.