Posted is a picture of an Altec five sectional boom rear mount that tipover it's rear. Story posted along with picture. Credit to Baldwin City Signal and Lift and Access Magazine. I have always wondered about the stability of lifting over the back of rear mount cranes. He was only lifting trusses, how heavy could that have been. Even at a far pick his computer should have stopped the lift. The crane was only a month old. It looks like the second section from the top got cringled.
Crane tipover
- Thread starter Cameron
- Start date
- Location
- Retired in Minneapolis
That's the first time that I've read that $5k damages were "minimal" An odd perspective I guess...
NickfromWI
Participating member
- Location
- Los Angeles, CA
Now it looks like that boom has a little jib to it!
Lumberjack
Branched out member
127' main boom, no jib offered I dont believe. That ding is probably where it hit the concrete wall I am guessing.
Unless the operator did something stupid like override/disable the computer, Altec (or the company that mounted/certified the crane) has a bit of a liability on this one. Lifting over the rear is suppose to be its strongest chart, guess it wasnt strong enough!
What I am wondering...... how did they decide who got to clamber up the truck to set the slings on the nose of the truck? I am guessing the truck was sitting nearly vertical.
Unless the operator did something stupid like override/disable the computer, Altec (or the company that mounted/certified the crane) has a bit of a liability on this one. Lifting over the rear is suppose to be its strongest chart, guess it wasnt strong enough!
What I am wondering...... how did they decide who got to clamber up the truck to set the slings on the nose of the truck? I am guessing the truck was sitting nearly vertical.
Lumberjack
Branched out member
PS: The story on the bottom right is an accident in my town, dude walked behind a rough terrain forklift out at Server Core I belive.
Could you post that article please?
Could you post that article please?
Struck By Machine-Columbus, Miss.
A foreman was killed at a steel mill when a telescopic handler ran over him. According to the county coroner, the telehandler was about to lift a 20ft long beam on the construction site when the incident occurred. Site policy states that the area was supposed to be cleared before the telehandler lifted the large items in the air so they could be taken by a crane. The foreman did not get out of the way in time before he was struck by the 30,000lb machine.
The county coroner noted that the forklift has several blind spots for the operator - one of the most severe is the area halfway back on the right hand side of the machine where the man was struck. OSHA is investigating the inicident. - Commerical Dispatch Online
I get these articles from Lift and Access magazine. Each issue they dedicate the back two pages to recent accidents involing lifting equipment, Cranes,forklifts,Bucket trucks,etc. Every issue there is usally some sort of arbor related injury. In this issue was written about a tree trimmer powerline contact in Tamarac,FL.
A foreman was killed at a steel mill when a telescopic handler ran over him. According to the county coroner, the telehandler was about to lift a 20ft long beam on the construction site when the incident occurred. Site policy states that the area was supposed to be cleared before the telehandler lifted the large items in the air so they could be taken by a crane. The foreman did not get out of the way in time before he was struck by the 30,000lb machine.
The county coroner noted that the forklift has several blind spots for the operator - one of the most severe is the area halfway back on the right hand side of the machine where the man was struck. OSHA is investigating the inicident. - Commerical Dispatch Online
I get these articles from Lift and Access magazine. Each issue they dedicate the back two pages to recent accidents involing lifting equipment, Cranes,forklifts,Bucket trucks,etc. Every issue there is usally some sort of arbor related injury. In this issue was written about a tree trimmer powerline contact in Tamarac,FL.
Lumberjack
Branched out member
Yep, thats what it was. I was wondering if the magazine had anything more, or was it just a reprint of the Commercial Dispatch's release?
The steel mill is a large undergoing, but it sounds like this accident is soley the fault of the foreman, an out of towner.
I sat beside one of the owners of Utah Electric, one of the main contractors, on a flight up to MN back in August.
Back on topic, the local crane manager told me the chart lifting over the front with their 28 ton is its weakest chart. I am guessing that that is because of the increased radius (structural not stability) but I could be wrong.
The steel mill is a large undergoing, but it sounds like this accident is soley the fault of the foreman, an out of towner.
I sat beside one of the owners of Utah Electric, one of the main contractors, on a flight up to MN back in August.
Back on topic, the local crane manager told me the chart lifting over the front with their 28 ton is its weakest chart. I am guessing that that is because of the increased radius (structural not stability) but I could be wrong.
- Location
- Home of the New Jersey Devils
Also, the engine is the counter weight for lifting over the rear.
- Location
- urbana, il.
Yeah that's weird to see a rear mount, tip off the back with such light weight! Thanks for posting cameron.
A crane went over in Brooklyn NY today, there was way too many emergency vehicles around when i passed by to get a peek at it. I'll see what i can fin out tomorrow.
Which is a similar reason why I'm wary of mobile platforms that rely on outriggers for stability on wet ground - I can't know who has dug up what previously, and wet ground is common over here. In fact, on one HSE awareness course I helped run, an outrigger sank but it wasn't critical at that point. They still seem to think its safer than climbing ??? They're certainly not top of my risk control measure list.
allmark
Participating member
I bid a job a couple weeks ago in an area that has been developed for 50 + years. The contractor told me there is anold tank somewhere. Cant figure on the crane unless it is located. It made me think if I would have known if he hadnt told me and what is available to check ground stability before setting up. Something similar to a resistograph maybe?
There are expensive radar types, but I suppose its use a CAT scan for services where the outriggers go, then use an earth auger to check the soil. Bit of a pain. Also use plenty of pads to spread the load under the outriggers.
I'd hazard a guess that it was the outriggers sinking that caused the rear lift Altec to go over. Disturbed ground on a dvelopment site. Its amazing how some drivers only put a small pad down so as not to mark a drive, when really it should be a stacked pyramid to distribute weigth over a wide area. A few extra inches make a huge difference (i'm sure theres a better way to word that, but I don't have the time /forum/images/graemlins/blush.gif).
I'd hazard a guess that it was the outriggers sinking that caused the rear lift Altec to go over. Disturbed ground on a dvelopment site. Its amazing how some drivers only put a small pad down so as not to mark a drive, when really it should be a stacked pyramid to distribute weigth over a wide area. A few extra inches make a huge difference (i'm sure theres a better way to word that, but I don't have the time /forum/images/graemlins/blush.gif).
Cleaning hangers in Buffalo last week a Bucket Truck with his outriggers setup on the county road asphalt went through, tipped all the way sideways and landed in some high power lines.
It could have happened to me. There was nothing to indicate any problem under the pavement. I doubt any pad would have prevented the problem.
We work in in a high risk busines.
If people would pay for CAT scans more it would be nice, but it's a hard enough world to husle things in as it is.
Money is what most thigs come down to, unfortunatly
It could have happened to me. There was nothing to indicate any problem under the pavement. I doubt any pad would have prevented the problem.
We work in in a high risk busines.
If people would pay for CAT scans more it would be nice, but it's a hard enough world to husle things in as it is.
Money is what most thigs come down to, unfortunatly
[ QUOTE ]
Cleaning hangers in Buffalo last week a Bucket Truck with his outriggers setup on the county road asphalt went through, tipped all the way sideways and landed in some high power lines.
It could have happened to me. There was nothing to indicate any problem under the pavement. I doubt any pad would have prevented the problem.
We work in in a high risk busines.
If people would pay for CAT scans more it would be nice, but it's a hard enough world to husle things in as it is.
Money is what most thigs come down to, unfortunatly
[/ QUOTE ]
Now thats scary.
Cleaning hangers in Buffalo last week a Bucket Truck with his outriggers setup on the county road asphalt went through, tipped all the way sideways and landed in some high power lines.
It could have happened to me. There was nothing to indicate any problem under the pavement. I doubt any pad would have prevented the problem.
We work in in a high risk busines.
If people would pay for CAT scans more it would be nice, but it's a hard enough world to husle things in as it is.
Money is what most thigs come down to, unfortunatly
[/ QUOTE ]
Now thats scary.
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