just a safety thought, after making brush picks, depending on ground conditions, when the crane takes a strain on the spar it might want to go back to vertical depending on root ball weight. just a thought, work safe. tom
Well, the tree was removed using 4 brush picks and a spar pick. I wound up doing the work and had someone to take 'stills' and 'vid', but they left after the 1st pick.
I did notch it to stand it up vertical.
I went back this morning and took some stills of the stump and spar.
The crane co. showed up with a 70 ton Link Belt.
[ QUOTE ]
Seems like the shelf/ "notch"/ snapcut combo would work best if the piece doesn't want to roll side to side, whereas the regular hinged notch would give resistance to side-to-side roll.
Thoughts?
[/ QUOTE ]
I think that if the pick is going to roll then, I'd either pick the limbs off that would make it roll or rig it so it wouldn't roll. If the hinge is keeping the piece from rolling then it's going to roll when you cut the hinge.
It depends on where the 'choke' is, if you're using a choker.
I used a 'red roundsling' and choked it on top of the spar. Had the CO hoist slow and swing towards the stump. When it was vertical, the hinge broke and it didn't roll a bit. The CO said it was the nicest 'tree pick' he's ever done. No shock load to the crane. He loved it.