Hyundai Samho Heavy Industries is said to have inked an order for two 9,000-teu containerships from a Singapore-based shipowner.
In addition not considered here is the trim of the vessel although this will have an effect and should be considered
Crane Mounted Load Computer
The Grove Crane has a load computer which measures the load weight, Boom Extension and Boom angle. Form this it can compare computed load against a model stored within its memory. As the load approaches overload alarms are sounded. The computer has an extra mode which takes into account operation with the flyboom. This load computer is there as a safety factor and in no way should be considered to replace proper planning.
To carry out a safe lifting operation a set of variables must be known; these consist of the nofollowing
Weight Of lift
This may be either a known weight i.e. a weight which is certified and clearly marked, or an unknown estimated weight- in which case the weight is estimated and a factor of safety applied
To be added to the lift weight is the weight of the hook and lifting accessories before calculations are carried out. For the hook this is given as a test weight of
Note that unless the lift weight is certified it is always classed as estimated in all circumstances.
Height of the Lift
Note this is measured form the boom pivot point and not the deck
The height of the pivot point above the deck is 4.2m
Radius of Lift
In a similar fashion the radius is measured from the pivot point and not the centreline of the crane. The distance from the pivot to the centreline is 2.1m.