WLL values given in the chart apply to steel wire ropes class
6x36 and 6x19 with fiber core with nominal wire durability of
according to EN-PN 12385 standard. Change
of the tensile strength to 1960 N/mm2
increases the WLL by
10,7%. Using a rope with a steel core will increase the WLL
by another 7,8%. When steel core, and rope of bigger tensile
strength is combined, as a result there is an almost 19,5%
increase of the WLL. Using ropes class 6x19M or 6x37M will
lower the WLL value in comparison to the presented ones.
A technical survey on slings should be carried out at least
every 12 months. In case of using slings for heavy duty,
the period between inspections should be respectively
shortened. Please find below the criteria disqualifying a sling
for further use:
WLL marking is illegible
The ferrule is visibly broken
There are at least 6 wires broken in a section equal to 6 lengths of the sling’s
There are at least 14 broken wires in a section equal to 30 lengths of the
There are at least 3 wires broken in one spot of the sling
Rope’s diameter is less than 90% of the nominal diameter
Corrosion causes lack of elasticity
There are discolouriations caused by high temperature
Under no circumstances it is allowed to exceed the WLL. This
value is given on a tag on each loop. Slings with an illegible
tag must not be used, and have to be decommissioned.
User is obliged to inspect slings periodically according to the
PN-EN 13414-2 standard.
See this page, where you can find safe temperature ranges for
working with slings, depending on how they are constructed.
Following those directives is obligatory.
Rope class 6x19 is not identical with construction 6x19! In
Poland, a typical, and popular rope 6x19 or T6x19 belongs
to class 6x19M, according to PN-EN 12385 norm. A typical
representative of 6x19 class is the 6x19S construction.
Rope slings should be conserved in a similar way as ropes,
or other metal tools. We recommend Unolit Spray Oil, for more information
about corrosion click here.
When lifting loads of asymmetrical mass distribution, it is
important to make sure that the load is equally distributed
– if in doubt, contact our specialists.