Wednesday, July 14, 2010

May 24th, 2009

Guro South Korea (outside of Seoul)- A Tower Crane collapsed during the crane erection process killing two and injuring one.

The crane is a small top slewing crane. It appears that the Counter Jib had been hung and either a counter weight or the main jib was next to be installed. The maximum over-turning moment on a crane is experienced when just the Counter Jib in in place during either the assembly or disassembly. There is a video of the scene here. If you'll notice the crane is mounted to a small frame. I'm not familiar with this type of frame, but it looks as if it sits on the ground and is presumably bolted down. Hopefully to large concrete anchors. The one side has sunk and unfortunately the pictures are clears whether this is bad soil or bad anchors.

타워 크레인 붕괴

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