probst RG-20/80 Instructions D'emploi page 44

Operation
The concrete pipes must be gripped in centre of gravity, otherwise there is a danger of slipping
off!
Be sure that the concrete tubes are completely hardened.
Gripping goods can slip away or roll away if they are deposited on slopes, unpaved or uneven
ground! Death and serious injuries can result.
Always place gripping goods only on horizontal, stable and level ground.
Always secure pipes against rolling away, for example with wedges.
Without lifting equipment/carrier the device may only be parked on even ground!
The gripping arms must be opened enough to ensure safe standing of the implement!
Otherwise there is a risk of tipping!
54500002 16 / 21 GB