12 - INFORMATION FOR USE371
CAUTION
Do not put the lifting straps in way of intakes, of sea exhausts or of other
protrusions.
Lifting straps must be positioned according to the loading conditions of
the yacht at the moment of its lifting, because these vary remarkably, for
instance, when the yacht is unloaded and dry or when the yacht is fully
loaded. The lifting straps arrangement must be carefully evaluated each
time, in order to prevent any damage to the yacht.
CAUTION
RIVA declines all responsibility for the location of the lifting straps, the
lowering of the yacht to the ground and the support points carried out in
other Shipyards.
DANGER
During haulage and launch, never stay underneath or in proximity of the
yacht.
• When ashore, the yacht must be located on a cradle with seventeen sup-
ports of width and size adequate to distribute the yacht weight evenly.
• The hull inclination must be as “natural” as possible, e.g. it must be par-
allel to the waterline and not to the keel. This to prevent that liquids on
board keep a normal level and that rainwater can be drained naturally.
Cradles
RIVA is capable of providing the cradles for a correct support of the yacht (op-
tional on demand). RIVA is not responsible for any damage resulting from the
use of cradles different from those expressly produced by RIVA.
Propping
It is a common procedure to use supporting props if no actual storage capaci-
ties are available. It is very important to take some basic precautions while po-
sitioning the supporting props for the yacht in order to prevent damage to the
hull structures, accidental falls of the yacht or injury to the involved personnel.
The following list contains useful advice. We also recommend always having
propping operations carried out by experienced personnel.
• Use supports with adequate strength and stability.
• Use correctly dimensioned supporting plates to prevent negative weight
concentrations.
• Place the supports preferably next to transversal structural reinforce-
ments (stringers).
• Locate the supports along the supporting ns of the hull.
• Always place at least 7 supports along the keel, 5 supports starboard
and 5 supports port in order to guarantee stability and weight distribution.
• Start positioning the seven keel supports along a straight line, appropri-
ately spaced to distribute weight.
• It is important that the supports have the same height in order to prevent
that the load is concentrated mainly on one of them.
• Have the yacht lowered very slowly until it almost touches the keel sup-
ports, adjust the height of the supports until they are in contact with the
keel, in order to guarantee a uniform load distribution and a neutral trim
of the yacht; keep part of the weight supported by the crane.
• Position the adequately spaced lateral supports; it is important to re-
member that the lateral supports must guarantee stability, but the whole
weight must be supported mainly by the keel supports.
• Check the support for stability, then completely lower the yacht and re-
move the belts.
To Next Page
Loading...