New Offya Video

Super cool vid! This is your basic Skyline Yarder setup employing a skyline, a carriage running on the skyline, a second line running through the carriage used to raise and lower your attachment point, a haul back line coming off the back of the carriage, and a skiddiing line coming off the front of the carriage. Curiuos how many guys were on the ground?
 
There was one climber (me) the other climber was filming there was one person running the grcs belly block and 2 people at the street end pulling the pieces in and chipping brush. A bit of standing around but everyone was moving at certain times of the day. If the setup had a steeper angle to the road you could get away with one less person on the crew.
 
Beautiful climbing and rigging, and that DMM Offya is quite a piece of gear. I grew up High lead and Skyline yarder logging and have used similar setups in the past to deal with big logs when no other option was available. Unfortunately the WLL of 2,200 lbs on the Offya would for me be a limiting factor for moving millable length logs.

A couple more questions if you dont mind-

1. I take it the man running the GRCS was manually pulling the empty carriage back to you with the haul back line? Because of the shallow rope angle on the skyline, and belly that was being created by the weight of the material, the fellas in the street were manually pulling the skidding line to get much of the material out to the street?

2. With what looks to be quite a bit of stretch in your skyline were you able to get most of the bigger wood out to the street using this system?

3. I assume the last spar was blocked to itself?

Thanks for sharing the vid cbugg, and I hope you and yours have a Happy Thanksgiving.
 
1. that is correct in terms of the haul lines. the people on the street just pulled the material "uphill" at the very end. we were conservative on how tight we made the highline to keep forces low.
2. there was flex in the anchor points but little to no stretch in the lines. they were dyneema core and very static.
3. the remaining wood was rigged out traditionally and hauled out with a loader.
 
rico said:
Super cool vid! This is your basic Skyline Yarder setup employing a skyline, a carriage running on the skyline, a second line running through the carriage used to raise and lower your attachment point, a haul back line coming off the back of the carriage, and a skiddiing line coming off the front of the carriage. Curiuos how many guys were on the ground?
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I am under the impression this is called an English Reeve system borrowed from rope access and beefed up for rigging trees
 
Very little stuff in the rigging world is new, and this is basically a classic skyline yarder set up with a simple twist to allow you to operate your attachment point (rigging hub, Block, ect.). Men have been flying BIG wood out of the steep canyons using this method for a very long time. If you ever have some time you could probably find some cool vids showing some skyline logging with both motorized and non motorized carriages. I myself worked for over a decade with an outfit out of Gold-Beach Oregon who ran a big skyline yarder where our skyline was a 1.5" cable which we could stretch a couple thousand feet out over a canyon. It all operated on the same basic principals as your rigging setup in the vid, with the biggest difference being the size and strength of our rigging, attachment points (tail holds, and spars), and the wood we were moving. I have seen 10-12 ft diameter old growth logs hit the carriage, which could be 100's and 100's of feet in the air, and haul ass to the landing.
 
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Some very impressive rigging work but I can not get by the fact that the rigging used is often exceeding the strength of the tree it is attached to by a fact of ten or more.

A human body is up there.

I feel certain that no one on that crew or at that company can predict the forces and vectors involved. Right at the end when the loaded spar bends and the climber is attached was the highlight for me. I'm glad it went well. I would not be impressed if that video was presented by a salesperson. I'd be worried.
 
TreeCo said:
Some very impressive rigging work but I can not get by the fact that the rigging used is often exceeding the strength of the tree it is attached to by a fact of ten or more.

A human body is up there.

I feel certain that no one on that crew or at that company can predict the forces and vectors involved. Right at the end when the loaded spar bends and the climber is attached was the highlight for me. I'm glad it went well. I would not be impressed if that video was presented by a salesperson. I'd be worried.
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This is the major problem with speedlining or similar setups. The lateral forces can be mind blowing. In our tall conifers, even when your just brushing a tree out the movement up top can be pretty amazing. When you get into some decent sized wood shit can get downright dangerous if you don't known what your doing. When I was younger we used to speed line some pretty big wood., and the only way we would get away with it was by running a few guy lines, both on the backside and laterally. These guy lines would have to be moved and pretensioned before each log, which was a royal pain in the ass.

I didn't witness it, but knew a guy who lost his life while speedlining some large logs without using the appropriate guy line setup. Uprooted the big Doug Fir he was working and he went down with the ship. R.I.P. homie...

I just watch the whole vid again and IMHO they never came remotely close to overloading any link in the chain. A mild ride on that last top, but thats the single best moment of our job...

As someone who dabbles in low budget vids, I have to say the quality of this vid is amazing and something to be proud of...
 
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I saw it at JAMBO this summer -- the training class on Monday. They are still in prototype mode, iirc. The DMM rep told me a ballpark price but I really cannot remember.

I will say that I added up the parts to do that with a rigging hub & biners & pulleys -- close in price.

Hope that helps.

--andrew
 
rico said:
I just watch the whole vid again and IMHO they never came remotely close to overloading any link in the chain. A mild ride on that last top, but thats the single best moment of our job...
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At 4:18 is where I'm talking about feeling uncomfortable with the looks of the system, with the climber tied into the spar above the load carrying anchor point of the trolly. I'd like to see what it looked like with the skyline loaded and the workers at the street pulling the trolly. Maybe the climber unhooked from the working spar and hung out on the spar he was on. It then jumps ahead several minutes to the part you mention liking, and I like it too, but I'm imagining the climber suggesting to not be doing a whole lot of tugging on the trolly line.

The work and video are at the top of our field, and the best I've seen. The trolly is a piece of work for sure.

Quite amazing and my hat is off to the crew!

Sorry to hear about the friend you lost and how he went.
 
The rig at 4:18 is probably the most controversial rig of the video and the climb. What we did to mitigate forces was lock off the hold back line and let the pice run on the belly block then crank the pice back up on that same block before having it run out to the road. I have taken out a lot of tops in a lot of configurations and this was not the roughest ride I have had by a long shot
 
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