07-16-2020, 12:04 PM
There was a similar incident in BC that killed one worker, seems like there was a failure of the collar plate on the outrigger. Ultimately it doesn't seem anyone was held responsible for it.
I don't know if it was an outrigger failure in this one, or if it was just not following the reach charts that are posted in the truck, or if the truck wasn't properly levelled on the outriggers when it was setup. Looking at some of the reach charts for concrete pump trucks, they all show the end hose pointing down when the boom goes below the level of truck, so I guess if the boom was fully extended and someone swung the end hose out horizontally it might exceed the capacity when the concrete starts pumping, and combined with a truck setup out of level or on soft ground, it could be enough to cause a tip over.
When I got certified to operate a broderson crane (8t maximum capacity), most of the class was just explaining the load charts and driving it into our heads that you aren't to exceed the listed capacity, make sure you set the crane up on firm level ground and don't swing it over the front. If you don't have the capacity, get a bigger crane. Those small broderson cranes have computers that won't let you lift or swing over capacity without using an override switch to do so. I don't know if a concrete pumper has that same system.
I don't know if it was an outrigger failure in this one, or if it was just not following the reach charts that are posted in the truck, or if the truck wasn't properly levelled on the outriggers when it was setup. Looking at some of the reach charts for concrete pump trucks, they all show the end hose pointing down when the boom goes below the level of truck, so I guess if the boom was fully extended and someone swung the end hose out horizontally it might exceed the capacity when the concrete starts pumping, and combined with a truck setup out of level or on soft ground, it could be enough to cause a tip over.
When I got certified to operate a broderson crane (8t maximum capacity), most of the class was just explaining the load charts and driving it into our heads that you aren't to exceed the listed capacity, make sure you set the crane up on firm level ground and don't swing it over the front. If you don't have the capacity, get a bigger crane. Those small broderson cranes have computers that won't let you lift or swing over capacity without using an override switch to do so. I don't know if a concrete pumper has that same system.