Okay Ag Engineers, knowledge us on what happened here.
http://uproxx.com/news/crane-collapses-lower-manhattan-death/2/
http://uproxx.com/news/crane-collapses-lower-manhattan-death/2/
quote:Someone effed up.
Okay Ag Engineers, knowledge us on what happened here.
quote:
Crane failures are almost always installation errors, or from operating outside the equipment's load/reach envelope.
quote:quote:
Crane failures are almost always installation errors, or from operating outside the equipment's load/reach envelope.
You're forgetting weather.
quote:saw the snow and was thinking reduced allowable stress.quote:
Crane failures are almost always installation errors, or from operating outside the equipment's load/reach envelope.
You're forgetting weather.
quote:
and ice good point, adding extra load and moment to the end of the crane.
quote:quote:saw the snow and was thinking reduced allowable stress.quote:
Crane failures are almost always installation errors, or from operating outside the equipment's load/reach envelope.
You're forgetting weather.
hard to tell what happened but i think the bigger question is why they were doing this type of lift to begin with.
quote:Cut the rigging into pieces and use another crane to lift the cab onto a flatbed. The tracks come off too.
How do you MOVE it now? Cut it into pieces?
quote:
Depending on the size of the load it wouldn't take much snow/ice accumulation on either the crane itself or the load to very quickly get way out of specs. Granted this is just speculation of course that this was the principal cause. Large lifts are not quick operations, so it's very likely they were in need of a window that was several hours long.
quote:That's not the kind of crane you would use for a wrecking ball.quote:
Depending on the size of the load it wouldn't take much snow/ice accumulation on either the crane itself or the load to very quickly get way out of specs. Granted this is just speculation of course that this was the principal cause. Large lifts are not quick operations, so it's very likely they were in need of a window that was several hours long.
I read it was swinging a wrecking ball to demo one of the buildings.
quote:
Gravity....that's what happened. I'm surprised you guys haven't figured that out by now!
quote:quote:That's not the kind of crane you would use for a wrecking ball.quote:
Depending on the size of the load it wouldn't take much snow/ice accumulation on either the crane itself or the load to very quickly get way out of specs. Granted this is just speculation of course that this was the principal cause. Large lifts are not quick operations, so it's very likely they were in need of a window that was several hours long.
I read it was swinging a wrecking ball to demo one of the buildings.