Question about drag lines

KevinS

KevinS

Branched out member
Location
ontario
Tomorrow I have a sugar maple 20-24" by 80-90'. This tree is right off the back corner of the customer's house but is also neighboured by similar sized maples and beech.

My plan is to rig into the beech 15-20' away so to pull pieces away from the house. Butt tie tops that I need to then tip tie limbs, logs,etc. I've got a 5/8" db line and 3/4" tenex xrr ring to ring or a 5/8" block and dead eye sling for a terminal rigging point in the beech.

My question comes with the maple. I can't just let everything swing and fly free due to fences etc. so I am planning on putting a second sling just below each cut with a secondary line to a porti to slow any acceleration in momentum.

My plan is to use a 3/4" tenex sling with a xl(beast) xrr to hold the drag line. I think this will be sufficient with either a 1/2" or 5/8" db line just to help hold it back, mostly a redirect.

How much force should I expect on that 2nd sling? will it need to be a 50/50 rating so I should use a block or should it be significantly lower?

The angle and load will obviously change on the primary block with every block I go down but the 2nd line should be fairly constant, I'd think?

Thanks for the input

Kevin
 
For the limbs, were you going to set a high rigging point in the maple then move it to a negative block position once the crown is gone? Essentially as you would any way without the load transfer line in the beech.
 
Just wondering if the beech is coming down too. I'm sure you know what you're doing but that's an easy tree to scar. Sorry, I know that's a little off topic.
 
No the beech is staying and I did think of that and the drag lines would help avoid knocking the bark off the beech with the logs
 
It seems that your plan is solid and all the component seem up to task. I would think its now your rigger or rope guy who becomes the variable. As long has he knows that the drag line is supplementary and should not even see 50% of the load then all shall be well. I've run the drag line as the climber before with a mini porty or a figure 8, depending on the size of piece being managed. Good luck and take a video ;-)
 
Worthaug said:
It seems that your plan is solid and all the component seem up to task. I would think its now your rigger or rope guy who becomes the variable. As long has he knows that the drag line is supplementary and should not even see 50% of the load then all shall be well. I've run the drag line as the climber before with a mini porty or a figure 8, depending on the size of piece being managed. Good luck and take a video ;-)
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Thanks
 
And even if the drag line sees 50% (say in order to float the piece to a mid lying drop zone) thee components you described are good to share a 1200lb piece (which is a really long piece of 20" Sugar Maple which you wouldnt have room for any ways). Know what I mean?
 
Just curious, what device will be controlled the load on the set up in the Beech? The reason I ask is it's super nice to pretension the top tied line and straight back cut through the log towards the block so that the remaining fibers of the spar keep the cut piece from shock loading the drag line and the spar that the climber is on. GRCS, Stein Dual, or a Stein pre tension pulley and RC 1000 are great for that.
 
Worthaug said:
And even if the drag line sees 50% (say in order to float the piece to a mid lying drop zone) thee components you described are good to share a 1200lb piece (which is a really long piece of 20" Sugar Maple which you wouldnt have room for any ways). Know what I mean?
Click to expand...

Yeah I think so I usually take 6-8' blocks so I don't think anything should be over loaded 3/4" tenex slings dividing the load should suffice
 
ive never tried running lines as a climber, but if you are worried about the forces on the maple, (as worthaug stated) you can just put a porti or maybe a figure 8 in the tree for the drag line. if im not mistake that should lighted the force that point sees, rather than run a block / pulley / rings down to a lowering device.
 
CutHighnLetFly said:
ive never tried running lines as a climber, but if you are worried about the forces on the maple, (as worthaug stated) you can just put a porti or maybe a figure 8 in the tree for the drag line. if im not mistake that should lighted the force that point sees, rather than run a block / pulley / rings down to a lowering device.
Click to expand...

I think the amount of force should be ok for a porti.

I believe as long as the drag line sling can hold the weight of the piece it should be ok. If the rope carries half of a block that equals the sling carrying up to the 1x the logs weight.
 
Worthaug said:
Just curious, what device will be controlled the load on the set up in the Beech? The reason I ask is it's super nice to pretension the top tied line and straight back cut through the log towards the block so that the remaining fibers of the spar keep the cut piece from shock loading the drag line and the spar that the climber is on. GRCS, Stein Dual, or a Stein pre tension pulley and RC 1000 are great for that.
Click to expand...
There will be a block and sling under the cut (and probably a lanyard) so be careful on using remaining fibers to help slow things down. I would think depending on the height of the terminal rigging point in the beech you're going to see somewhere close to half on the drag line gear.
 
TreeLogic said:
There will be a block and sling under the cut (and probably a lanyard) so be careful on using remaining fibers to help slow things down. I would think depending on the height of the terminal rigging point in the beech you're going to see somewhere close to half on the drag line gear.
Click to expand...
You are correct Logic, it's a technique that take practice and awareness. Just a little nip at the end prevents tear out accidents.
 
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