SilverBlue
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Flowers my Asparagus, there must be some other kind of vegetation growing under them trees
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Kneejerk Bombas
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Looks like fun.
The pully could have been higher. You also need to understand the loads involved and use the right size equipment, so you don't pull a Geo.
The pully could have been higher. You also need to understand the loads involved and use the right size equipment, so you don't pull a Geo.
In MQuinn's TakeDown at University Thread ; a tree was fallen with a line top side rear that went wrong, luckily with out injury. For, here we set the weight, leverage, speed and direction of the tree against itself. Too much pretightening, too fast a fall, pulley set too high (too much restriction) etc. can over steer the tree quite powerfully i would think. Enoungh releif, quick enough as not to fold the tree back on itself(?); possibly killing someone i think.
i think the technique is very similar to using more pull on one side from side rear in the Tapered Hinge . The position exactly opposite of a motion (felling) is the most leveraged position to control by pull i think. The hinge pulls from the but, the line from the side, the line is more leveraged a position (from compressed part of hinge); but the hinge fibers are tighter, stornger, less elastic; so apply their resistant correction more inteseley and immediately upon movement of the spar.
Also, i think by the low angle of the line pulling back towars hinge there are some examinations of Hinge Pocket Pressure Rig ; though not in the pressure it places in the hinge, just the low angle, rear control of the line.
If line is laced on the load with a horizontal bend in line it would be similar to Self Tightening Torque a more dramatic correction is invoked i think.
Or something like that
:alien:
i think the technique is very similar to using more pull on one side from side rear in the Tapered Hinge . The position exactly opposite of a motion (felling) is the most leveraged position to control by pull i think. The hinge pulls from the but, the line from the side, the line is more leveraged a position (from compressed part of hinge); but the hinge fibers are tighter, stornger, less elastic; so apply their resistant correction more inteseley and immediately upon movement of the spar.
Also, i think by the low angle of the line pulling back towars hinge there are some examinations of Hinge Pocket Pressure Rig ; though not in the pressure it places in the hinge, just the low angle, rear control of the line.
If line is laced on the load with a horizontal bend in line it would be similar to Self Tightening Torque a more dramatic correction is invoked i think.
Or something like that
:alien:
matthias,
I've used that technique a few times to lower trees onto sensitive landscapes successfully, and oncelowered a pretty massive lighteningstruck ash that way. It all depends on the hinge holding out for you, I've also had some hinge failures occur and if you areonly using one rope to lower(i.e. one anchor point) you can get one mighty hell of a swing! For that reason I won't use that technique anymore unless I can lower off of two points and triangulate the operation.
I've used that technique a few times to lower trees onto sensitive landscapes successfully, and oncelowered a pretty massive lighteningstruck ash that way. It all depends on the hinge holding out for you, I've also had some hinge failures occur and if you areonly using one rope to lower(i.e. one anchor point) you can get one mighty hell of a swing! For that reason I won't use that technique anymore unless I can lower off of two points and triangulate the operation.
blue
ArboristSite Operative
an old one of me
blue
ArboristSite Operative
and another
blue
ArboristSite Operative
opps try again
MasterBlaster
TreeHouse Elder
What are ya, in Russia? Or os that an observatory underneath ya there?
blue
ArboristSite Operative
MB,
nah i 'aint in russia.the building is part of a 18th century garden.the tree was dyin and in a public area so rather than waste money keepin' it safe for 5years then takin it out it was taken out.the crane was used cause there was no access and the drag out was around 100m.from memory the job took 4 days.1 day lowerin off everything over the wall.one day speed linining everything else that was possible over the wall then 2 days for the rest.the trunk was the worst bit i did a big bit that the crane driver said went to over 1000kgs on his computer in the cab!!
nah i 'aint in russia.the building is part of a 18th century garden.the tree was dyin and in a public area so rather than waste money keepin' it safe for 5years then takin it out it was taken out.the crane was used cause there was no access and the drag out was around 100m.from memory the job took 4 days.1 day lowerin off everything over the wall.one day speed linining everything else that was possible over the wall then 2 days for the rest.the trunk was the worst bit i did a big bit that the crane driver said went to over 1000kgs on his computer in the cab!!
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