Vetter Wedge Lifting bags - Manual (Page 5)

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2.4 Safety instructions
The prespecified protective clothing is to be worn during the ope-
ration. National regulations connected with the lifting bag sys-
tems and their operation are to be observed.
Wedge Lifting bags are only to be used with compressed air. Un-
der no conditions are inflammable or toxic acting gases to be
used. The lifting bags must only be inflated with original Vetter
fittings because these are subjected to an acceptance test by the
manufacturer. The lifting bag system is to be checked before and
after operation to determine whether it is in perfect condition.
Never lay two or more wedge lifting bags
on top of each other.
Ensure that the load does not slip. Gravitationally support loads
being lifted during a continuous lifting procedure. Always pay
particular attention to the stable condition of the support materi-
al during support work.
The support structure must at least support
the whole area of the bag and must be larger
in its length and width than in its height!
Attention danger of slipping! Never place
metal on metal when carrying out support work
Place stones, branches or similar items under the bag in order to
increase ground grip when the ground is slippery (ice, snow, mud
etc.). Avoid pointed loads such as grips or screws etc.
Never place the bags on sharp edges or hot to red hot components.
Use suitable intermediate layers and cover the whole bearing area
of the bag. Protect the bag from sparks from welding or separa-
tion work. Do not additionally subject the bag to such things as
hydraulic stamps, hoists, falling loads etc.
Never remain under the load being lifted,
and never try to grip the load from below!
Remain at a safe distance!
Avoid shearing effects caused by bag squeezing when deflating.
Never stand in front of the load during operation, always place
yourself to the side of it, because the bag can be catapulted out
under unfavourable conditions.