Is it Safe?

[TheTreeSpyder]

i found this advertisemeant at Wesspur's site.

Should all lines be pretightened?

 

[Colin]

Whaddoya mean, all lines?

 

[TheTreeSpyder]

i project that if climber's line is tight, and any 'BOING' happens from rigging line (pulling perpendicular to both spars support at most leveraged position) from recoil, line tension relief from running rig or landing load etc. ...

Could cause one spar to pull the climber into the other spar that is coming at him/her anyway as spars spread in opposite directions. The line pull on the climber will be almost perpendicular to their stance/stability too; also some uplift, making them lighter.

i'd think you'd want to run 2 rigs, high on the far spar, lower on close spar, run line on close spar, to let far spar catch, tie in on close spar, or spar that weight is coming off of. Possible bracing directions opposite horizontal pulls. Or hitch spar your cutting to close spar high, then brace to ground angled , and in opposite direction.

Nice picture, but that scenario, and any reason to have to trust far support, and swing to it, could be ruff too. i'd think the only reason to do as the pic shows is if ya have to/hanve been zigg zig-zagging between spars, working them down using each other. Even then, i'd go for seperate lifelines or something i'd think.

Not that I've ever played around a lil'too far and had anything like that ever potentialy happen to Me , to make Me think about it or nuthin!

/forum/images/graemlins/propeller.gif

 

[NickfromWI]

What advertisement?

love
nick

 

[TheTreeSpyder]

Sorry, i guess i missded this attatchment(i swear i put it in, renamed file etc. too?)!

Part of my tree story is here:
The thread title is from some discourse;
betwixt Giants: Dustin Hoffman and Sir Laurence Olivier;
in the dental torture scenes (a'la Josef Mengle) of
Marathon Man (that were shortened after being too strong for test audiences).


So, i allow/perpetuate those blood curdling scenes and that haunting question to ring in my head still.

"Izzzzzzzzzzz it Safe?" (as the drill motor starts)













AAAAAaaaaaaaaaaaaarrrrrrrrrrgggggggggghhhhhh!/forum/images/graemlins/crazy.gif

Well, "Izzzz it Safe?"
/forum/images/graemlins/propeller.gif

 

[Mark Chisholm]

I'd prefer a more tense climbing line. He may have been expecting some movement (being tied into a different tree and all) but with 2 blocks at near 90* the trees will draw closer and not likely to draw away at all. I would think that a taught line would slack when the load is applied in the rigging and then get taught again after released?

 

[tod_k]

I like my climbing line tight also. And yes those two spars will pull together during load. It seems the rigger is taking managable pieces and the movement would be minimal. Is it safe? I would say yes. The beauty of rigging trees, no one will do it the same. Is the rigger doing it the safest way? very hard to say with just a photo. But what is the safest way anyway? Is my plan the safest? your plan, Marks plan, Norms plan, Toms plan. This is whats makes tree work so interesting.

 

[Mike_Maas]

My guess is the climber needed to reposition during the cut and was relying mostly on his lanyard, with his climbing line as a back up.
I see no saftey issue with a small loop of slack in his climbing line. The line may have been taught when he started his work and became slack as he worked around the spar.

 

[Norm_Hall]

As long as a "tree risk assessment" is done, I would think this method is OK. It's definitely pulling the 2 trees together. Looks to me like the slack is there because there is a load on the lowering line. Once the load is released, the climbing line won't have the slack.

 

[cory]

Do you guys think he made his cut(s) leaving just enough to hold it and then stowed his saw and then pushed the piece off, or just how did he get his saw hanging on his belt with the piece looking like it just starting it's descent..?

 

[Mark Chisholm]

It looks to me like he cut it, it became static and then he decided to take a picture of it while it was hanging.

 

[cory]

But its not hanging straight down...doesn't it look like it swingin?? Do you mean it wasn't being lowered more but it was still swingin?

 

[Mark Chisholm]

Good eye. As I look more at it, I'd have to say that it looks tilted. I would still think that it is still, but it is titled due to being tied on the tip and on one side. What do you think?

 

[cory]

Wut about the line the piece is tied to....it looks far from perpendicular which could mean the piece is swingin.

 

[Mark Chisholm]

Yeah, could be swinging. The more I look at it the more those nubs are annoying me.

 

[cory]

Btw, that second "pulley"...is that a small pulley viewed from the narrow perspective or could that be a carabiner?

 

[cory]

Yes, lots of gnarly stubs.

 

[Mark Chisholm]

Yeah, it does look like a krab.

Don't you think he's holding a camera for the close-up?

 

[cory]

What kind of trees do you figure those are? My (east coast) guess is redwood or hemlock, but probably redwood.

 

[cory]

I can't see a camera. Have you ever tried that style of hardhat? They funnel all sounds into your head cuz of the sorta funnel shape and make everything louder