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Look! Ang Moh Eat Shit! How dumb! LOL!
- Thread starter tun_dr_m
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- Aug 8, 2008
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This case I think not photoshop.
2 factors caused the problems:
- ground there is sloped towards water.
- wrong type of lifting equipment used for this job.
They had been just using the trucks with hydraulic arms for the salvage / rescue. These are not suitable. They are actually for loading Ground Level Loads into the back of the truck. The correct equipment is a real hoisting crane, which have a cable to be lowered down to the water level which is 3m or more below the ground level where the trucks stood.
Thus Stupid Ang Moh I said.
The tuck they used has no hoisting cable chook only a hydraulic boom / arm, that are not meant to be lowered down below the ground level where they stood. Because that deep downwards angle need to be level up to horizontal and then upwards (towards vertical) to lift up the heavy weights. When it is near horizontal, the weight is actually being pushed outwards to wards the sea, and causing high bending moments to tip the truck into the water.
It is tricky, because car filled with water is much heavier than they normally are. When initially lifting they seemed easy. Once the body is out of water the effect of buoyancy is gone. Plus that angle of arm / boom now extends towards the water - it swings outwards as it swings upwards. The chance of tipping the truck when the operator is distracted by the apparently successful lift, the truck goes out of balance and tip into water.
The host type of crane will be totally different. It will not lower it's arm towards water surface nor swing up the arm in process of lifting. It will just lower the cable vertically down after fixing the arm at a suitable position, then it will pull the cable up with the load without swing arm up / down. Once the wreckage is lifted clear the ground level, crane can swing it towards ground while keeping the same vertical angle of arm. Then lower the wreckage on ground.
I know because I am learning class 5 driving and lifting this year.
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