Question for giles

[DNgroundworks]

Here goes a crap desciption of a machine that i keep seeing on different sites, its a normal looking excavator, but with a ram on top and one of the side i think of the main boom, and the dipper looks as if its offset to the main boom.

What is it and what are they used for?

[msh paving]

it is used for offsett digging paralel with the trench such as basements or square manhole shafts so you dont have to reposition the exavator MSH

[DNgroundworks]

ahh thats why united utilities have one then eh

[msh paving]

so easy to dig a square hole,but you lose out on reach,my mate has a 13t case with a gimpy arm and street pads very usefull excavator MSH

[GB_Groundworks]

yeah knuckle boom, there ok we had a 3 ton zero tail swing hitachi with it, didnt get on with it prefer the pivoting king post like most 1-8 ton machines,

but its also easy to dig a square hole with a pivoting kingpost machine. the knuckle booms are betting for repeat offset digging like along side a wall etc if your doing a 100metre trench keep the cab square to the trench and keeps all the pull forces in the right direction.


like this

i like the city boom spec'd machines where you can staighten the main boom out as well as the stick,