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Clearly knuckle booms are the best.
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I do not agree with that. They both have their places.
But for my opperation, having only one large expensive truck that can do many things, is the right choice for us.
Being able to haul, 30,000 lbs of logs, chips, rocks, other equipment on the bed of my crane is a sure plus. The boom is nicely packaged behind the cab and out of the way.
I sure like not having to get the truck fully level for it to perform is nice too. Put down some blocks and pads and get that crane working. Not all the incrediable amount of time needed to stack blocks in order to get the crane perfectly level like other cranes.
I like being able to reach under things. heck, I've loaded logs into a boxed container with it. Or put things through missing windows into a building.
I like the speed of our boom, faster then you could want it if you went full speed.
Disadvantages: 1.Don't really have the height for the amount of ton the crane is in most cases.
2. Climber often works near the boom. Boom could smash or pin the climber if something done wrong. Once, a white pine limb was holding the boom back and there was tension on the boom that I did not know, when i was setting slings. Limb broke all of a sudden releasing the flexed boom and boom came at me. Could have been a problem.
3. If not using a long winch cable, to pick a peice straight up, you can't just boom up, you need to boom up and telescope out at the same time if you want the pick to go on a complete vertical path. Which, stick cranes have to be careful of other things too, like flex in stick when pretensioning will pull tip down and therefor out farther, etc.