Posts Tagged ‘collapse’

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Sydney Scaffold Collapse

Monday, March 16th, 2009

Saw a post on Kevin Jone’s SafetAtWork blog (see my blog roll) on an accident involving a scaffold collapse. 

The accident is reported in this website. Note that there had been a scaffold incident just weeks before this accident.

The victim did not put on his harness, the other painter that did survived. Based on the report, it seems like a scaffold connection failed… fall arrest system harnesses is a last line of the defence that should never be neglected.

Apparrently the painter that survived was hanging on the harness for about 45 minutes, luckily he was able to stand on a window ledge, if not suspension trauma could have set in.

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Another crane collapse in U.S. (Miami)

Wednesday, March 26th, 2008

Take a look at this short report on a crane collapse that killed two persons in Miami, Florida… according to the report it is similar to the collapse in New York, so I presume it is another tower crane.

Click here for recent posts on crane collapses.

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Tower Crane Collapse in New York (16 March 2008)

Sunday, March 16th, 2008

Looks like this is not a very good year for tower cranes. Another tower crane collapsed in New York killing four and making significant damage to surrounding buildings. Click here for more detail.

This blog reported a tower crane collapse in Singapore recently. Click here for posts on tower cranes.

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Possible causes of tower crane collapse as reported in ST

Friday, February 29th, 2008

Straits Times interviewed an engineer and they came up with 4 possible causes of toper crane crashes

  1. Corrosion of anchor bolts
  2. Low quality or wrong steel anchor bolts
  3. No “tie-backs” for taller cranes
  4. Overloading

Item 4 is of course irrelevant to this case as the crane was not carrying any load at the time of the accident.

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MOM press release on the tower crane collapse

Thursday, February 28th, 2008

Pretty fast response from Ministry of Manpower. Click here for the press release. There’s a large photo of the failed anchors and some basic details.

Can’t resist it… some logical questions on the cause of the collapse:

  • Which anchor failed first? Assuming point A matches anchor 4 (see photo from MOM) so logically anchor 4 failed first… as it is the furthest and subjected to the highest load?
  • If the crane collapsed without any load, does it imply that the material is defective, in particular the portion joining anchor 4 and point A? Bearing in mind that the foundation is intact.
  • When was the crane last inspected? What was the condition? How old is the crane? …

The list can go on… but I would not want to be drawn too far into this! All the best to the investigators.

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