JayinKitsap wrote:So on Saturday was the load test for a 5,000 ton capacity crane, lifting 5,500 lb in the test. Before the barge that was the test weight was lifted out of the water, it appears the massive 4 way hook fractured, causing slack in the line and a whiplash. The crane went over backwards in a total failure.
Okie wrote:JayinKitsap wrote:So on Saturday was the load test for a 5,000 ton capacity crane, lifting 5,500 lb in the test. Before the barge that was the test weight was lifted out of the water, it appears the massive 4 way hook fractured, causing slack in the line and a whiplash. The crane went over backwards in a total failure.
The video does not start until long after the failure of the hook mechanism/swivel.
The entire barge in the foreground was the test weight and I did not see any waves from when the test barge would have settled after the hook failure which indicates to me that it failed long before it reached its 5,500 ton test.
Argh matety someone will have to walk the plank.
Sokes wrote:I wonder if the hook manufacturer didn't make an overload test? Bad calculation or casting mistake?
Sokes wrote:Anyway offshore is a new technology. Such accidents can be expected. At half load is a bit strange though.
Okie wrote:Only having a wild guess there was a bad calculation since the failure was apparently less the 50% of the rated load.
Okie wrote:Building cranes is not new technology no matter their use. The technology has been around since Egyptian times.
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