SAFETY
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2.5
STABILITY
2.5.1
Guidelines for Stability
Rig capacity charts are calculated in compliance with the European standard DIN EN
791 (issue 1995).
WARNING!
Rig tipping hazard!
The conditions listed in the following must be observed in order that the
stability of the rig is guaranteed.
Conditions for operation:
– Rig angles and loads on main rope, auxiliary rope and crowd given in the capacity
charts are maximum values which must not be exceeded for safety reasons.
The specified loads apply only when not combined and not used on an altered setup
of equipment.
Mounting attachments which are heavier or have a higher centre of gravity (like ex-
changing a Kelly with CFA equipment) requires a new calculation of the rig's stability.
– Machine on firm, horizontal and even surface. National safety codes and guidelines
observed concerning the soil and working platform conditions.
– Upper carriage held stationary with crowd and main rope load.
– Slow swing of upper carriage with load on auxiliary rope.
– No diagonal pull.
NOTE
Pulling and pushing forces of the winches / crowd cylinder and the
present centre of gravity (position of the work attachments) are factors
which have additional influence on the rig’s stability.
The loads given in the capacity charts take into consideration the most
adverse position of the components.
Conditions for onsite travelling:
– Firm and even travel surface. National standards and guidelines observed regarding
ground, soil and surface conditions.
– Upper carriage in line with undercarriage.
– Work attachments and movable loads kept as close to the ground as possible.
– Mast vertical.
– No abrupt movements.
