Rock climbing equipment vrs. tree work equipment

The arborist/tree work field is constantly changing and improving. Of all the trades, I think tree work has changed more in the past 20 years than many other trades.

For example, the ropes used for climbing trees is changing, and improving, almost daily. Even 5 years ago the climbing ropes used were totally different in almost every way from what is used today. The only true resemblance is that they are made of fibers, and hold us from falling out of the tree.

New tree climbing saddles which are radically different from previous ones are introduced every year.

Even the field of knots, which is one of the oldest recorded skills/trades, is applied in new and innovative ways in today's tree work.

Tree workers are aggressive in the pursuit of new and better ways of doing their jobs. Borrowing, stealing and modifying any tool or technique from all other fields imaginable to streamline and make more efficient the difficult job of tree work.

When I think of this, I compare the field of electronics to the tree equipment field.
The two fields have an evolution factor which is similar. For example, a two year old computer or cell phone is darn near a dinosaur. The same applies to a two year old climbing line, or even something so basic as a climbing saddle.

In general, of all the fields which tree work borrows tools, techniques, and ideas from, the rock climbing field is one of the most heavily used.

Some of the fields which tree workers take ideas from include:

Utility pole climbers, window washers, high rise steel workers, industrial safety supply companies, fire departments, high angle rescue, the maritime industry, the aero-space industry, even mining has a few tricks which have been employed by tree workers in their constant pursuit to improve and make their jobs easier.

The sport rock climbing industry is one that has been heavily funded over the years. They can be credited with many of the new innovations which we, in the tree world, take for granted today.

However, there is a downside to all this cross use of tools and techniques.

The downside is that often tree workers will attempt to force a tool or technique from some other field to work for them in some tree work related task.

A few examples of this include, but are not limited to, the tibloc, toothed cams, non-locking 'biners, and high strength static lines.

Some of the disastrous results of using tools from other fields in tree work include:

Suspension trauma, snapped load points, ripped climbing lines, tree workers falling from trees, and tree worker deaths.

Tree work, while similar to other fields, is a unique trade. Tree work encounters situations which no other field encounters. Take for example the use of non-locking 'biners commonly used in the rock climbing industry for personal fall protection.

It has been shown time and time again that while a rock climber can get away with using a non-locking 'biner for primary fall protection, it just is not safe enough at all for tree workers to use as in the same application.

Another example is descent devices. Rock climbers commonly use the 'rack' to descend from heights.
Tree workers more commonly use descent devices which are auto locking. They have a lever which when squeezed, allow the climber to descend.

The difference between the two? On a rack, if you let go, then you fall. A rack has no built in safety feature. So for tree work, you must have a completely separate system in place to ensure you do not fall.

With the Petzl Stop, or the Gri-gri, or the Anthron, all of these employ a feature which will prevent you from falling if you let go of the device.


Just food for thought. Be very careful in what tools you use, and practice 'low and slow' before using the device or system at height.

Frans
 
Re: Rock climbing equipment vrs. tree work equipme

Good points Frans.

A difference that I see between arb work and other rope access disciplines is that arbos don't take the time to understand the limbitations [that's a Tree Spider-esque typo, so I'll leave it
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] of many pieces of equipment.

From the first climb arbos are taught to use a climbing system where 'let-go-lock-off' soon becomes a solid muscle memory. Then, without retraining brain and muscle tools, like figure eights or racks are used. This can lead to failure. There are plenty of other devices like you mentioned that have a LGLO feature that I'd rather see being used.

There have been tests run on various rope tools that have found that some of them are very sensitive to rope diameter and construction. Some are not very forgiving.

There are still plenty of ascenders being used that are not compatible with half inch arbo ropes.

At one of the SRT workshops that I taught I was asked why I didn't teach the class using half inch ropes and friction hitches. My explanation was that many more rope tools are compatible with smaller diameter ropes. Also, there are too many variables between rope and cord to even start to be comfortable teaching the use of friction hitches to do what properly chosen rope tools can do. There isn't a large body of research on rope/cord friction considering the variety of combinations that are available. I would be dollars to donuts that there are no two climbers who use the same climbing rope, friction hitch and friction hitch combination at the ITCC this year.

Granted, arbos do have the best understanding of what combinations work together. I do wonder if the hitch/cord combos were tested in the same manner than belay/rappel devices are tested if they would stand up to scrutiny. I think taht we would be pleasantly surprised.

Add to your train of thought...the Unicender. The first, and only, rope tool that ascends and descends without a changeover. The Unicender came from the arbo field. In time it will cross over to other rope access use and it's descendants will change the way all rope access workers move on rope.
 
Re: Rock climbing equipment vrs. tree work equipme

[ QUOTE ]

It has been shown time and time again that while a rock climber can get away with using a non-locking 'biner for primary fall protection, it just is not safe enough at all for tree workers to use as in the same application.



Frans

[/ QUOTE ]

Good info.... As a climber, I would like to add a bit to the use of non locking biners. Usually, when rock climbing, you will have a long string of gear in place. So, in the event if one piece pulls or you have a gate failure, most likely the next one in place will do the job. Never in my 28 years of rock climbing have I had a biner failure (but certainly have had pieces rip out). I think the problem with the use of non locking biners in tree work is that you do not have a string below it, rather that is the only piece preventing you from taking an unsuspecting swing into the trunk. Seems to me most non locking biners used in tree work ( at least I hope) are used as redirects. Not me, though... always a locker.

One other odd thing: In rock climbing, it is a huge no no to use a biner (locking or not) to tie into your harness. You always connect with a figure 8. The biner is just another piece of gear that could fail. I wonder why cannot come up with a way to leave the biner out of our system for tree climbing?
When I think about all the individual pieces of gear that my life is relying on, it kind of spooks me out a bit. I can think of so many areas that if one piece of my gear failed, I would be dead. A ring on my saddle, my bridge, a biner, my friction saver pully, etc.. Yikes
 
Re: Rock climbing equipment vrs. tree work equipme

When I started climbing in an old ttraditional saddle, I tied a clove hitch to both d rings and no snaps or biners. It worked great for crane work since you constantly are removeing your rope. Spliced rope does change that now though. Although I am pretty sure I can untie and tie my anchor hitch just as quick as I can unlatch my biner.
 
Re: Rock climbing equipment vrs. tree work equipme

Non-lockers should never be used in any part of a climbers's support system. If a redi failed or unclipped it is likely that the climber would fall not just swing. Even if this weren't contrary to Z133 it is not good practice.
 
Re: Rock climbing equipment vrs. tree work equipme

[ QUOTE ]
Non-lockers should never be used in any part of a climbers's support system. If a redi failed or unclipped it is likely that the climber would fall not just swing. Even if this weren't contrary to Z133 it is not good practice.

[/ QUOTE ]

I agree. No non lockers.

Also, a swing into the trunk, depending on where you are, could be just as bad or worse than a fall. I have seen guys fall out of trees in flat, soft areas and laugh it off.

Leave the non lockers for tool storage. Or rock climbing. Heck, I even have a locker on my chain saw laynard
 
Re: Rock climbing equipment vrs. tree work equipme

I have many single action biners...use them mostly for speed lining or lowering light loads. For critical work, I'll use a locker, or two non lockers, gates opposed. and for pole saw, tool attachments, sending tools up and down....etc etc. It's simple to know which to use for what task.
 
Re: Rock climbing equipment vrs. tree work equipme

wire gates are great for racking things, I would not rule them out

I have rock climbed since 88 and have never carried a "rack" to rappell with. LEARN to rappell/belay the right way. When the gri-gri first came out, newbies were learning some bad habits. A brake hand is a brake hand, don't let go unless you have a back up. Rock gear is designed to be light, tree gear is designed to be durable. Keep this in mind when tranfering the two.

When I first started tree work..96....everyone poo-poo'ed ascender and anything aluminum.Also, rope diameter decrease is a good thing IMO. I like light.

bottom line....If you don't know the limits of your gear, don't push it.
 

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