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ALP accident
In response to the comments with picture 20081 I said I would show an example of what can go wrong! - this ALP was set up on a tarmac road but with restrictions for jacking - the offside (drivers) front jack is on a 'restricted jacking mode - (not as far out as the others) the offside rear jack has collapsed through the road surface - possibly because of the proximity of drains/gulleys along the road edge there were no 'jack pads' in use so the applied load on the jack base has a smaller area in which to transfer its weight, - it can also be seen from the position of the booms and turntable that the majority of the applied/enforced weight is over the jack (this is the 'burdened' jack) that has collapsed throgh the road surface the jack on the nearside front (in the air) is the 'unburdened jack' and had least weight on it at the point of failure. The only reason the appliance did not go over fully is because the rear jack beam and bodywork came into contact with the ground - the booms are not leaning on or touching the building nearby .
This is why it is so important to take account of all conditions and hazards when setting up an ariel appliance !!
Just so you know the operator in the cage was shaken but uninjured and made their own way down the boom ladders !!
In response to the comments with picture 20081 I said I would show an example of what can go wrong! - this ALP was set up on a tarmac road but with restrictions for jacking - the offside (drivers) front jack is on a 'restricted jacking mode - (not as far out as the others) the offside rear jack has collapsed through the road surface - possibly because of the proximity of drains/gulleys along the road edge there were no 'jack pads' in use so the applied load on the jack base has a smaller area in which to transfer its weight, - it can also be seen from the position of the booms and turntable that the majority of the applied/enforced weight is over the jack (this is the 'burdened' jack) that has collapsed throgh the road surface the jack on the nearside front (in the air) is the 'unburdened jack' and had least weight on it at the point of failure. The only reason the appliance did not go over fully is because the rear jack beam and bodywork came into contact with the ground - the booms are not leaning on or touching the building nearby .
This is why it is so important to take account of all conditions and hazards when setting up an ariel appliance !!
Just so you know the operator in the cage was shaken but uninjured and made their own way down the boom ladders !!
i see what could of happened then. well if there are any ESFRS ALP firefighters take a look and take note.
Added by Harvey Dan on 08 November 2009.
Added by Harvey Dan on 08 November 2009.
Harvey,
its not just East Sussex Firefighters, all aerial operators ought to be shown this picture it has a far greater effect than 'burdened and unburdened jacks etc etc ' Its incredible no one was injured in this accident !!
Added by Rick Loudon on 08 November 2009.
its not just East Sussex Firefighters, all aerial operators ought to be shown this picture it has a far greater effect than 'burdened and unburdened jacks etc etc ' Its incredible no one was injured in this accident !!
Added by Rick Loudon on 08 November 2009.
Rick,
Thanks for adding this photo very interesting and scary to see what could happen if all goes wrong. Cheers
Added by Richard Whiting on 08 November 2009.
Thanks for adding this photo very interesting and scary to see what could happen if all goes wrong. Cheers
Added by Richard Whiting on 08 November 2009.
Other
Added by Barrie Green on 08 November 2009.