With another use of the double bag technique you could throw the bag / line over the tree near the center. pull it back, drop it down next to the trunk, hopefully next to a good limb. attach another line on, pull the 2nd bag up, manipulate, and drop the set of bags over the good limb. At minimum...
In that example the throwline was thrown over two branches on one side of the tree that are say at a right angle to eachother. That angle will push the line / ropes towards the trunk. attach a second line / bag to the end, pull it back until the two fall between the two branches. Now you have a...
Michael Oxman captured some of the instruction portion of the event on video and posted them.
Check it out here:
https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2Fmauicrf450rider%2Fposts%2F10156916430893229&
I think if a team is well versed in rescue and operation of dual rope (possibly twin tension) work positioning systems, it's a non-issue.
At ARC (Aerial Rescue Challange) Troll, a SPRAT instructor showed how quickly a rescue could be performed. He used his gear, rescuing an arborist on arborist...
A well designed twin tension system can be easily operated with one hand. Drop the lanyard and bomb. Less heat build up due to spread out load / heat.
It may not be beneficial in every situation, but I think it can be reasonably implemented in many.
So, Jeff Inman is the one who outlined twin tension system at ARC. He prefaced it with an acknowledgement that it may not be best or practical in all situations, but it's worth considering.
The way you'd use it on a conifer if you're presetting a line is:
- throw over 2 suitable limbs
- double...
I can operate both zigzags with one hand, not an issue. I did have to play with the carabiners to get the height correct. I believe others have successfully operated 2 hitches, and some other mechanical too.
We just did some training at Aerial Rescue Challenge 2019 with SPRAT techniques, as well as some seminar style education on twin tension systems.
I've been trying to implement twin tension into my work practices. So far it's been on spar (bottom up conifer takedown, and on a cottonwood...
I wrote an article on Facebook a while back about this. The senas actually can create hazardous noise levels inside your muffs in these situations. We use earplugs under our muffs.
Not sure if you want something that can be useful on trucks too, but this is what I settled on. Haven't actually purchased it, but it's the best value I could find.
http://www.pfdiagnose.com/Store1.html
I'm doing some research on these, but I'm interested. I'm up in Stanwood so shipping isn't necessary.
What is your experience on this vs a comparable self propelled unit in productivity? We've been subbing everything out too, but I'd been thinking of getting a grinder for some of the smaller...
We use Fleetio, it's a cloud based app for fleet management.
FYI, FMCSA changed the rules, you don't need to have post trip forms filled out unless there is a defect. The actual inspections are still required.
We set firm dates. Generally we stick to them. We have a "catch-up" day penciled in for every other Friday, and we'll reschedule someone if we have to make something work. Usually they understand.
We do the same as far as recording them. Depending on the project I do or don't share the tip with the team. I've had a job where I felt like it was a pity tip after we spent way too long on a project because I'd sent an apprentice up and he was spinning his wheels, the client knew it took way...
Out here you can do it. like working within the 20' MAD you need a spotter. However this spotter has to be elevated to the height of the lines so that can ensure you don't encroach the applicable MAD. The spotter would probably be in a bucket truck... Or, get the lines shut off.