Fixtures; Limits Of Use; Special Attachment Methods - Pfeifer GK 8 Manual Del Usuario

Fig. 3.7.2: looped
Fig. 3.7.4: double looped

3.8 Fixtures

For the intended use of the fixtures it is essential to take
into consideration their specific operating manuals,
unless they are described in greater detail in this
instruction manual.

4. Limits of use

CAUTION: Do not move chain slings over
sharp edges (Edge radius less than nominal
thickness of the chain). Use edge
protectors or intermediate layers to protect
chain. In the event of use on unprotected
sharp edges the carrying capacity of the
chain in DE, CH and LU must be reduced by
20 % according to DGUV rule 100-500.
According to ÖNORM a reduction by 50 %
should be taken into consideration.
Country-specific regulations must be
observed.
For example, this type of load occurs with choker
hitches.
Fig. 4.1: correct
Fig. 3.7.3: looped
Fig. 3.7.5: double looped
Fig. 4.2: wrong
Fig. 4.3: correct
4.1 Limits of use for special
attachment methods
There are attachment methods that are widely used, but
require the carrying capacity to be reduced:
Laced attachment method (Choker hitch)
In this case a chain leg of the chain sling is guided
through or under a load and the attachment part (e.g.
hook or ring) is fastened to surround the chain. This
attachment method can be used when no suitable
attachment points are available and offers the additional
advantage that the chain sling bundles the load. In the
case of use of a chain sling in the choker hitch the
normal angle should be possible to set without using
force (see Fig. 4.1.1 – 4.1.5). For the choker hitch the
carrying capacity (WLL) – as specified in the carrying
capacity tables – amounts to 80 % of the carrying
capacity according to the tag.
Double laced attachment method
This method offers greater safety for loose bundles by
means of additional looping of the load (see Fig. 4.1.3
and 4.1.5). If using the double choker hitch, the
carrying capacity (WLL) is likewise limited to 80 % of
the carrying capacity according to the tag. When two
chain legs are used in the single or double choker hitch,
make certain that:
• Lace consistently clockwise or anti-clockwise if no
torsional moment should act on the load
• Lace clockwise and anti-clockwise if the load should
not roll away during the first lift (see Fig. 4.1.4 and
4.1.5)
CAUTION: Do not lace with more than two
chain legs, because otherwise the load will
not be uniformly distributed to the chain
legs.
Fig. 4.4: wrong
Chain slings 11/2019 / Subject to change!
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