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PAGE 6<br />
GOOD SLINGING PRACTICE<br />
BASIC RULES ... 1<br />
1.5. KNOW HOW TO FIND THE CENTRE OF GRAVITY ... 2.<br />
The "Centre of Gravity" of a load is a point which, if the load could be suspended from it,<br />
the load would be in perfect balance.<br />
The crane hook needs to be directly over the centre of gravity, for the load to be stable.<br />
This load is not stable.<br />
The hook is over the<br />
centre of gravity, but<br />
the C of G is above the<br />
crane hook.<br />
This load is top-heavy,<br />
and could overturn<br />
while being craned.<br />
This load is<br />
stable. The<br />
hook is right<br />
over the<br />
load's centre<br />
of gravity.<br />
WHAT WILL HAPPEN....?<br />
UNSTABLE<br />
Hook is not over<br />
centre of gravity.<br />
The load will shift until the<br />
centre of gravity is under the<br />
hook.<br />
This will make landing the<br />
load very difficult, and could<br />
cause major problems in<br />
craneage.
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