Toppling Crane

Frogmogman

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Kronstadt is in Russia. They don't do H&S in Russia, or sobriety while operating heavy machinery.
Kronstadt is where CMBs of the Royal Navy, inspired by Augustus Agar VC’s 1919 sinking of the Russian cruiser Oleg in CMB4, attacked the Bolshevik navy in harbour, resulting in the award of 2 more VCs.

The Royal Navy Attacks on Kronstadt, Russia, 1919 and 3 VCs

There is quite a readable book about the whole episode called Operation Kronstadt by Harry Ferguson.


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CMB4 is tucked away in a corner at the IWM Duxford, where she seems rather out of place.
 

starfire

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Yes they do. It shows the rated load for the setup of the crane at that time & the load on the hook
An alarm goes off at 90% of capacity.
That's if it was even working or setup correctly.

Some of the time it's the operator not extending the stabiliser legs all the way, but telling the safeload they are all the way out.

Spent a good chunk of my life driving the big ones, some jobs were standing small cranes back up again
 

Slowboat35

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All to easy to do, judging from the number of such incidents on Yoube. Between the eejits that simply don't bother to think about load and extension to those that probably just accept "Oh? Four tons mate I expect" - and then act on it unquestioningly.
Darwinism is everywhere...
 

Concerto

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Should have used a bigger crane.

Agree about the final 10% limit with a crane ringing a bell. In the very late 1960's my father employed a crane to lift out a similar size yacht. Capacity was 12 tons, but we rang the bell once clear of the water. The craner driver advised he was close to the limit but believed he could complete the lift. It was lifted very slowly and nudged in as close to the wall as soon as possible until the bell stopped. For the lift back in, we used a larger crane for safety. 50 years ago there were very few crane hire firms that had any cranes larger than 12 tons.
 
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