×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Tower crane collapse onto occupied apartment building in Sydney, Australia

Tower crane collapse onto occupied apartment building in Sydney, Australia

Tower crane collapse onto occupied apartment building in Sydney, Australia

(OP)

Link

No apartment occupants injured, but many displaced.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

OUCH!

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Gotta link to the article?

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Glad no one was injured... no code requirements for crane loading?

Dik

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Never seen one like that before. The video at about 14 seconds in seems to show the crane being fixed to two cantilevered and knee braced beams sticking out the side of the building that is being built.

so it appears as if the beams have failed.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

I hadn't noticed what LittleInch has pointed out. Looks like the structure of the building wasn't strong enough to support the crane. Maybe the right hand didn't know what the left hand was doing?

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

(OP)
Here is a photo of the post-collapse cantilever platform: Source

Quote (VertiKal.net)

The crane - owned by Morrow tower cranes - was being erected on a cantilever base mounted to the side of the building when the cantilever structure pulled away from the wall.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

I'm amazed anyone would attempt this folly! How is an optimized skyscraper expected to support a crazy moment-arm dynamic load like a tower crane?

Keith Cress
kcress - http://www.flaminsystems.com

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Keith,
The key word in your comment is "optimized". There is no reason a crane cannot be supported off the superstructure of a building, provided the superstructure is designed for the forces imposed. The other issue is connections to the structure, and that may be the problem here.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Hi hokie.

I realize they could build any building to do this but why? I'd think you might have to do fairly odd things to a building to get it to safely support a crane like that. I'd expect the building to be made to support vertical loading (weight of the building) not large lateral forces applied essentially at a point.

Looks to me the building failed more than the connection to the building, since the building shape appears to have been affected in the accident. I'd sure like to see a picture of the inside. :)

Keith Cress
kcress - http://www.flaminsystems.com

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

I assume they did it that way to avoid supporting it at ground level. Must be something important down there.

We can't really see much of the building from those pictures. The scaffolding is in the way. But you may be right, the structure may have failed. Whichever, coordination between the crane design and the building design/construction was faulty.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Gien that the building itself is only a few stories above the connection maybe it hadn't got to its 28 day curing time?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Apparently no higher elevation connection to the building was planned since the operator was in his seat at the time and apparently thinking all is OK to go to work. That's still one heck of a moment arm on the base with any lean of the tower or jib load.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

Most of them that I've seen go into an elevator shaft and the building gets built around the crane until it's time to pull it out.

RE: Tower crane collapse onto occupied apartment building in Sydney, Australia

and sometimes even a hole in the floor slab. It's wedged in place at floor levels to take any moment... and has timbers to support it vertically.

Dik

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close