Crane overturns while erecting tilt-up wall - GIF

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Oct 17, 2022, 08:14 AM
Altair

Crane overturns while erecting tilt-up wall - GIF

Crane overturns while erecting tilt-up wall.

<video controls autoplay loop> <source src="https://diqn32j8nouaz.cloudfront.net/crane_overturn_rigging_fail.mp4" type="video/mp4"> Your browser does not support the video tag. </video>

Previously:

https://www.homemadetools.net/forum/...441#post162098
https://www.homemadetools.net/forum/...239#post211322
https://www.homemadetools.net/forum/...243#post208018
https://www.homemadetools.net/forum/...371#post192609
https://www.homemadetools.net/forum/...545#post185759
Oct 17, 2022, 08:20 PM
IntheGroove

Bragg Crane Service is a pretty big company, I am surprised this happened...
Oct 17, 2022, 10:30 PM
nova_robotics

Quote:

Originally Posted by IntheGroove

Bragg Crane Service is a pretty big company, I am surprised this happened...

I dunno. Every crane company I've ever worked with, big or small, has about 25% of their operators that are complete yahoos and will run the machine way past chart. And in Canada these are red seal ticketed journeymen. It's always old farts who "know better" than the computer. The young guys are still too timid to do anything stupid. I've seen some catastrophes, including one really bad injury. It basically liquified some guy's leg. He spent 6 months in the hospital before I changed jobs and lost track of him. 6 months later they were still talking about amputating his leg.
Oct 17, 2022, 11:29 PM
thevillageinn

Those structures intimidate me, particularly as they are being constructed.
Oct 18, 2022, 04:31 AM
NeiljohnUK

Seen this sort of thing before: https://www.homemadetools.net/forum/...441#post162215
Oct 18, 2022, 08:36 PM
Ralphxyz

The way the panel was rigged was asking for trouble.

Ralph
Oct 18, 2022, 10:24 PM
Frank S

Quote:

Originally Posted by Ralphxyz

The way the panel was rigged was asking for trouble.

Ralph

In this case the rigging is not the source of the failure. The lifting points are engineered into the design of the casting of the wall panels made right into the reinforcing steel inside of the panels. the use of pulleys on the slings is also how the transition from horizontal to as near vertical as possible. due to the location of the lifting points and the way the slings are rigged allows the wall slab to be supported and kept from buckling as it is raised.
The cause of the crane toppling was because the car body or track carriage was perpendicular to the crane boom this is also acceptable in most cases, but the crane was just a little too far away from where the wall needed to be erected, or a miscalculation in the amount of counterweight required. But in my opinion since it is evident they had already aet at least 2 of the full-sized panels and 1 panel with a door opening it might be that this panel may have been just a little bit thicker than the previous panels. As large as those panels are it would be entirely possible to have an extra of concrete and the extra thickness not be noticed at the edges
Oct 21, 2022, 03:59 PM
trinketman

Quote:

Originally Posted by Frank S

In this case the rigging is not the source of the failure. The lifting points are engineered into the design of the casting of the wall panels made right into the reinforcing steel inside of the panels. the use of pulleys on the slings is also how the transition from horizontal to as near vertical as possible. due to the location of the lifting points and the way the slings are rigged allows the wall slab to be supported and kept from buckling as it is raised.
The cause of the crane toppling was because the car body or track carriage was perpendicular to the crane boom this is also acceptable in most cases, but the crane was just a little too far away from where the wall needed to be erected, or a miscalculation in the amount of counterweight required. But in my opinion since it is evident they had already aet at least 2 of the full-sized panels and 1 panel with a door opening it might be that this panel may have been just a little bit thicker than the previous panels. As large as those panels are it would be entirely possible to have an extra of concrete and the extra thickness not be noticed at the edges

Agreed. I've worked on several tilt up's. Most of ours were 16ft walls. These look taller. The whole structure is pretty shakey in general until the bar joists are set. And we just had one near Edwardsville ,IL , Amazon collapse during a storm.
Oct 22, 2022, 06:36 PM
Frank S

Quote:

Originally Posted by trinketman

Agreed. I've worked on several tilt up's. Most of ours were 16ft walls. These look taller. The whole structure is pretty shakey in general until the bar joists are set. And we just had one near Edwardsville ,IL , Amazon collapse during a storm.

I've been on job sites where they were trying to stand those short 15 or16 foot tall panels with a telehandler, nothing but an open invitation for a disaster.
How would you have liked to be on this job site? I would have paid admission to watch that one
https://www.concreteconstruction.net...ilt-up-panel_o
Oct 23, 2022, 07:54 AM
trinketman

I think I might have been so tight bunged it would be very hard to do #2. These jobs made a lot of work for 90 days then nothing. Ate up real estate. Sprouted like mushrooms. The first one I worked to 15 minutes to walk diagonally. Then they got bigger.