skyline tips
- Thread starter natems361
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sgreanbeans
Treeaculterologist
Yep, they do it all the time up north, its the part of tree work called logging, you can see it on the show "axe men" on the History channel.
I know its logging, I'm dealing with a swamp cant skid em. I'm familiar with axe men. I have not seen anything to fit my budget. Did I miss something?
treeclimber101
UNCLE BUCK
They have helicopters for that kinda work works well with a dingy ....:msp_thumbup:
sgreanbeans
Treeaculterologist
Absolutely, see it all the time
Could you explain
AT sawyer
ArboristSite Operative
This highline was rigged to get locust logs up a mountain for a trail project. 250' 3/8" wire rope suspended from skookum blocks, anchored to stout trees, and tensioned with a griphoist. Lewis winch used to haul the load:
You have to be careful not to overload this type of rig, as the highline will sag under even modest loads. We never exceeded 500lbs.
View attachment 225736
You have to be careful not to overload this type of rig, as the highline will sag under even modest loads. We never exceeded 500lbs.
View attachment 225736
tree md
Addicted to ArboristSite
This highline was rigged to get locust logs up a mountain for a trail project. 250' 3/8" wire rope suspended from skookum blocks, anchored to stout trees, and tensioned with a griphoist. Lewis winch used to haul the load:
You have to be careful not to overload this type of rig, as the highline will sag under even modest loads. We never exceeded 500lbs.
View attachment 225736
Hey AT, the link is not working... I'd like to see it as well.
Carburetorless
ArboristSite Guru
This highline was rigged to get locust logs up a mountain for a trail project. 250' 3/8" wire rope suspended from skookum blocks, anchored to stout trees, and tensioned with a griphoist. Lewis winch used to haul the load:
You have to be careful not to overload this type of rig, as the highline will sag under even modest loads. We never exceeded 500lbs.
View attachment 225736
Yeah, I'd like to see what you guys are doing on the Appalachian Trail.
AT sawyer
ArboristSite Operative
How's this? Picture shows up on my login.
We usually use highlines to move cut stone. Putting logs on one was a first for me.
View attachment 225748
We usually use highlines to move cut stone. Putting logs on one was a first for me.
View attachment 225748
tree md
Addicted to ArboristSite
OK, I can see it now. Pretty cool. What are you guys using to control it while it traverses?
We were doing a lot of speed lining a few years ago when I was working with a contract climber. He had some cool speed line tricks. We used a porty and a figure 8 to control the lowering on the speed line. A little time consuming to set up but in some situations it just makes so much sense to use one.
We were doing a lot of speed lining a few years ago when I was working with a contract climber. He had some cool speed line tricks. We used a porty and a figure 8 to control the lowering on the speed line. A little time consuming to set up but in some situations it just makes so much sense to use one.
got it now. If I'm understanding pic , you lowered the highline hooked up the load, then tightened the highline. Lifting the load, then hauled it with a winch. Is that right?
AT sawyer
ArboristSite Operative
Yes, the the line was lowered each time. If you fully tension an unloaded line then place a load on it, the tension will spike at the midpoint of the load's traverse and the wire rope could fail. There is a multi-variable formula for determining the max working load on a highline that involves length of span, weight of load, weight of wire rope, and deflection of wire rope. It doesn't take much to over stress a highline and if you don't have stout anchor trees, you can pull your spar(s) over. Any professional rigger on this site could add more this discussion.
We were hauling uphill, so we had a smaller set of blocks for the Lewis winch wire to keep it aligned with the wire rope so the pull would be in-line with the highline. Whenever I've lowered cut stone from a landing, I've used a porty to control descent. I have to keep reminding people (mostly volunteers with little highline experience) to keep their hands off the wire when a loaded block is being lowered. The porty only has but so much control and the rope will stretch. It can't pull a 500lb rock back uphill if the running block goes over your finger.
We were hauling uphill, so we had a smaller set of blocks for the Lewis winch wire to keep it aligned with the wire rope so the pull would be in-line with the highline. Whenever I've lowered cut stone from a landing, I've used a porty to control descent. I have to keep reminding people (mostly volunteers with little highline experience) to keep their hands off the wire when a loaded block is being lowered. The porty only has but so much control and the rope will stretch. It can't pull a 500lb rock back uphill if the running block goes over your finger.
flushcut
Addicted to ArboristSite
Guy lines help greatly with any anchor tree wether it is a old growth oak or a boxelder sapling.
AT sawyer
ArboristSite Operative
This cartoon is an approximate, the formula will get you close to an actual WLL, and is better than a WAG. Pro riggers likely have a few more variables. Note how little weight it takes to run up the tension on a wire and why load determination is important. It's easy to measure the spar height, wire length, etc., but how accurately you determine the weight of your load is just as important. Having your blocks set high gives you more room for deflection.
This whole setup gets pretty expensive for pulling a few logs out of a bog unless you have the mother load of firewood and will use it on a regular basis.
Lastly, you don't ever want to stand under a load bearing wire.
View attachment 225800
This whole setup gets pretty expensive for pulling a few logs out of a bog unless you have the mother load of firewood and will use it on a regular basis.
Lastly, you don't ever want to stand under a load bearing wire.
View attachment 225800
That link isn't working , thanks for all the info. And yes a boat load of firewood and mill lumber is up for the taking. If i can get it out its mine.:help:This cartoon is an approximate, the formula will get you close to an actual WLL, and is better than a WAG. Pro riggers likely have a few more variables. Note how little weight it takes to run up the tension on a wire and why load determination is important. It's easy to measure the spar height, wire length, etc., but how accurately you determine the weight of your load is just as important. Having your blocks set high gives you more room for deflection.
This whole setup gets pretty expensive for pulling a few logs out of a bog unless you have the mother load of firewood and will use it on a regular basis.
Lastly, you don't ever want to stand under a load bearing wire.
View attachment 225800
AT sawyer
ArboristSite Operative
AS must have changed the way attachments upload; I've never had this trouble before. Try this:
View attachment 225816
View attachment 225816
Very nice thank you your a scholar
:msp_thumbup:
