It's been slow here lately so here's an interesting OT I thought you guys might like. Got it in an email.

9 day old 250t (275 US tons) Liebherr Crane (first job)
$4 million price tag


Failure to use back propping (shoring) beneath the 200mm (just under 8" ) thick concrete deck
has catastrophic results.
Crane support outrigger punches through slab causing crane to lose balance and collapse across
the site and onto adjoining property.


It appears there was nothing other than the factory pad under the outriggers.
Shoring may not have helped anyway.


Crane balanced in the air for approx 1 hour before entire rig & boom collapse completely across site
and rigs falls through to the basement level.





Amazing that no-one was seriously injured or killed.
Can you say: "oops".
What do you tell the boss? Sorry,I had a bad morning?
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