Crushing - Weber Rescue Systems SP 40 C Operating Instructions Manual

28 | Possible applications
Chains must not be used if:
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5.4

Crushing

Pipes and other hollow profiles are crushed by closing the spreader arms.
If possible obly use the tips to crush material. With the old SP 35 with steel arms it's
also possible to use the fluted area of the arms.
ATTENTION!
Material to be crushed can suddenly jump away.
Do not remain in the work area of the spreading devices!
Deformations, cracks, signs of corrosion are present.
The wire diameter of the chain link has decreased by 10%
of the nominal thickness.
An individual chain link has been permanently stretched.
An individual link has been enlarged by more than 2%.
The internal chain pitch over a measuring distance of 11 chain
links has increased by more than 2%.