Slacking on the blog, I know. But I have always said that the blog needs to be fun, if it were to become a chore it would lose something essential. So there you go: life kicks, simply out of the time and head space necessary to sit down and give things sufficient thought to then be able to write about them in a more or less coherent fashion. Not for the lack of themes, mind you!

In Japan right now. After the earth quake last time, this time I can add a typhoon to my Japan experience list. That was a lot of wind and water.

Had a great few days at Shop K in Ina. It was a pleasure talking for two days to the group there about how we select anchor points in tree care. This involved practical demos and breaking some stuff, as well as screen- and whiteboard based elements. And lots of discussion. I love running this kind of session, as apart from an outline you do not really know where you are going to end. As well as keeping me on my toes, I also learn a lot from these discussion.

It was also a good opportunity to chat to people about the treeMOTION evo, DMM’s Transformer, the new Hitch Climber Excentric and the Offya trolley.

Thank you to Atsunori Yamaguchi for the video…

Up to Oona in Nagano province tomorrow to do two days discussing rigging systems with the crews of Maruichi.

A big thank you goes out to all who made this trip possible, all at ODSK, Takashi Osaka and the Poynter family… as well as everybody who made time to come along and attend the workshops.

Gear in trees

Back climbing today. I keep coming back to the fact that I struggle to think of something I’d rather be doing, especially on a lovely, late summer day like today. Perfect conditions to work on a group of enormous beeches, they must be pushing forty meters at their very tips.

I was using the treeMOTION evo with the Transformer on the bridge, as well as the Hitch Climber eccentric – and was absolutely loving it. Or actually, let me rephrase that: my rule of thumb tends to be that if I can put gear on my harness and forget that it is there, then it is doing its job well. If it is clunky and unwieldy, forcing me to focus on it all the time – it is not. These two tools definitively fall into the former category, the rotation-limiting swivel on the Transformer allowing me to effortlessly switch between the free-spinning and the locked position. I found this especially useful today when using the Captain hook to move around the canopy or when traversing, as then I attach both connectors, the Ultra O of the work positioning system, as well as the connector attached to the Micro Traxion I use on the 10mm Sirius on the Captain. In these situations it is a big help to be able to go into free-spinning, preventing a twisting motion on the bridge.

Yes, it adds weight to the harness. But to be honest, once I am off the ground, the benefits easily outweigh any negatives from the slight increase in weight, in fact, I am not even aware of the weight on the harness once aloft.

The other thing I have found is that I use the Hitch Climber eccentric somewhat differently than the original model in that I use the top karabiner, the one attaching to the termination to the middle hole. This allows the stitched terminations to line up nice and flush in the profile of the body of the pulley. Also, this way, the top hole always remains free to pop a Revolver Rig into when running a V-Rig. All of the applications I would normally run off the free middle hole, I now run off the second bridge of the harness – or off the swivel on the Transformer, depending on whether I want manoeuvrability or stability.

So, I had a good time. Look forwards to more climbing tomorrow…

Catching up

After a whirlwind couple of weeks, finally finding moment to sit down and sort through some of the impressions which have piled up – and to try a sort them into something half-way coherent for a blog post.

First off was two weeks up in the mountains, which I always enjoy. Not being much of a mountain person, to be honest, I never cease to be fascinated by the myriad moods and atmospheres caused by weather and light filtering through the high peaks. The week of exams was intense and demanding, I love to see people succeed – finding it hard in equal measures when they struggle and fail. But both are part and parcel of an exam, so you get both – as well as average performances.

The site we were, the golf course in Thun, is right next to a military tank practice range, which made for some… interesting noises. We also had gliders launching and landing right over the top of the trees we were working on. I probably spent too much time admiring them passing overhead 😊

We started our days really early every morning, leaving the B&B we were staying in in the dark. I finished off the week with a most inelegant episode, where I stumbled down the steps, in the dark, fully loaded up, both hands full, miss the bottom step, twist my ankle – and ended up doing a full length face plant! Eek. Apart from feeling very sheepish, this left me with two bloodied knees. Très élégant!

End of the week it was on up to Gadmen, a wee spot on the way up to the Susten pass. The forecast was pretty abysmal, with the possibility of snow even. When I left home, it was 30°C! I was most certainly not prepared for this, neither mentally nor in terms of kit I had brought with me. We had a three day workshop planned there with Richard Delaney from Rope Lab with a very special group of people. Come to that, the place we were staying in, Evergrin, was really rather spectacular, run by Chrigu and Isa,  two of the nicest people you could wish to meet. Some of the rooms they let out are in the converted farm house that they live in with their children, the rest are in old circus caravans. Highly recommended if you are looking for a place to stay in the hills.

The three days with Richard involved a rambling discussion revolving around various aspects of working on rope. We ended up rigging gin poles, bi-pods and tripods over the Gadmerwasser, the river flowing past Evergrin.

Certainly a big thank you goes out to all involved in that project.

After that, it was set-up time for vertical-connect 2018.

After weeks of fine weather, the forecast was mixed, so we decided to rig the big red tarp offering a degree of protection, same as we did last year. But the really big thing this year was the scaled-down wind turbine which was added onto the drop tower in the Seilbahnzentrum, including a perspex tube below it, offering the possibility to demonstrate confined space operations in its 80 cm diameter.

The two day topics this year were Access on Thursday and Resilience on Friday.

A broad range of takes on access were covered during the day, ranging from rescue plans for “simple” use of PPE, such as when working on small-canopy trees or working off pre-rigged life lines, accessing a casualty in a cave or in a silo, planning  a work site on steep, inaccessible terrain or rigging accesses in wilderness, all the way through to accessing and working on wind turbines.

The first day ended with the second vertical-connect challenge, which was highly entertaining, involving, amongst other things, a horizontal ascent event, where competitors “ascended” a horizontal line, lying on their backs on trolleys. An added difficulty here was that they had to avoid the Pendulum of Death, a huge spiked ball which looked like something escaped out of Game of Thrones, filled to the brim with water balloons. You get the picture…

That evening there was the traditional vertical-connect dinner on site, followed by the afterparty in the Sherlock Holmes pub, with treemagicbeers from Belgium going hard.

The second day was all about resilience. Again, a wide range of speakers exploring lots of different facets of the topic, from the concrete to the abstract. One session I found specially moving involved two friends who sustained very serious accidents describing the return back to life after their falls. Interesting, moving and intense stuff. Further topics included designing resilient configurations for mechanical advantage systems or a theatre portraying the same job site run by three crews of different levels of competence.

All in all, I had a great time, met a lot of old friends and made some new ones. The diversity of topics offered lots of food for thought. I see a great benefit in dialogue between people working in different areas on rope – after all, there is no need for all of us to constantly reinvent the wheel when there may be applicable solutions out there already.

Give that candidate some points!

Just preparing the stuff I need for scrutinising at next week’s arborist exam.

With 36 candidates, testing them for knowledge of equipment and work safety, one and a half hours per candidate, it is going to be quite a week. Then it is straight on up into the mountains to get ready for vertical-connect, so this is quite an epic packing session, as you can imagine.

I was just thinking about past exams before and about funny work-around answers. One of my all-time favourites has to be the candidate who answered the question What means do you have to document hazards and risks? with a very witty Pen and paper. I was prepared for all kinds of answers, VTA, risk assessments, you name it – but this was not one of the answers I had anticipated. But of course, technically, it is correct.

I hope I gave the chap some points.

Sometimes, when you don’t know the answer, getting creative – whilst it may not be the solution – may at least be entertaining.

Some things new

At this year’s International Tree Climbing Competition and the trade show of the International Society of Arboriculture’s conference in Columbus, Ohio a number of new products whose development treemagineers were involved in were shown for the first time. This is obviously a very exciting moment, as oftentimes there will be a number of years worth of work invested before the launch, without being able to discuss the concepts or climb the tools in public. So this is moment you get to gauge people’s response to what you are showing, giving you a first inkling whether it is going to fly, whether they buy into the concept behind the product.

Put it this way: we were very busy on the DMM/ Teufelberger booth on both Saturday and Sunday, with lots of people stopping by to check out what the buzz was about.

What is the buzz about?

The Hitch Climber Eccentric was an opportunity to revisit one of the first products we worked on with DMM. The obvious difference is that the overall design of the pulley is no longer symmetrical. The three holes are staggered, the spindle is offset from the centre of the pulley. This, in combination with the reworked fairleading surfaces of the pulley lead to a significant improvement of over-all efficiency. It is not only that the line runs fair into the bottom of pulley, but also the karabiner side of the rope channel has been reworked, meaning that the line builds minimal friction in all directions when running through the pulley. Also, the top end of the pulley has been extended upwards. This point is the pushing surface, meaning that the pulley is in contact with the coils of the hitch sooner, the hitch collapses less and is not only pushed earlier, but also more efficiently.

In field validation I found this to make the friction hitch behave in a more responsive and reliable fashion, grabbing better and sooner. The improved fairleading surfaces also made the performance of the Hitch Climber feel slick and fluid.

I am really thankful to the time, ingenuity and effort Elliot and Chris have invested into the Eccentric, I have to admit that I was initially a bit nervous about reworking the plucky little Hitch Climber, as you cannot help but love the simplicity and intuitiveness of the original design, but this update integrates flawlessly into my climbing system, accommodating all the techniques I would usually use while work positioning in the canopy, so they have really come up with the goods!

Another other tool we presented was the Transformer, a spreader bar with an integrated rotation-limiting swivel which can be added to the rope bridge of you climbing harness. The concept of spreader bars has of course been around for years, all the way back to the old spreader snaps with a central ring to attach the climbing system to (see below).

The Transformer iteration (see image right at the top of this post) of that design however represents a significant evolution of the original concept. What is the benefit, you ask? Well, due to the load being spread much wider, the load on your hips is significantly decreased, almost as though you were climbing off your front D-Rings. This represents a tangible ergonomic gain. Further, the friction you build is less than a ring, but more than a pulley, for my taste hitting a sweet spot between the two. On top of that, there is the rotation-limiting swivel, which offers three positions: free spinning, locked and 220° of rotation. When climbing, I tend to have it in the lock position until I am in a situation or using a technique where twist starts to build on the rope bridge. Then it is as easy as turning the knurled barrel on the side of the swivel in to the free spinning position. Especially when using a V-Rig I find that a swivel is really helpful, yet for normal work-positioning I find it a bit annoying, as lines can twist and also the swivels have clearly defined wear points, unlike rings which can rotate freely.

I therefore absolutely love now having the option of the best of both worlds right there on my rope bridge! Good stuff. Also, of course, the Transformer also means that you no longer need to replace your swivel due to it being worn by the rope bridge.

Looks heavy, you say? I have my thoughts on that, more in the next post or so.

Oh, and the launch of the treeMOTION evo? More about that also to follow.

Sometimes you cannot help but wonder #2

When it comes to making women feel welcome and included, I would suggest that the tree care industry has a problem. Bearing in mind that roughly 50% of humanity is female, there is a clear under-represantation of women in tree care.

The reasons for this are manifold, as was demonstrated at this year’s Climbers Forum in Augsburg. The discussion there was intriguing, ambiguous and there was a wide range of views expressed when it came to what exactly reasons are, whether there is a problem at all – and if so how to mitigate it.

One thing that really gets me going is inappropriately used imagery. In view of the imbalance I strongly object to a sex sells-pitch to promote brands or gear. Do not get me wrong, I have no issue whatsoever of images showing women behaving in a professional manner, on the contrary, I think this can send a very powerful, positive message.

However, the image above really had me scratching my head.

C’mon, Stihl, you can do better, surely?

I mean, what is even the narrative here? Is the lady going to ride off into the sunset, wielding the MS661 in one hand and the axe in the other in gay abandon? I don’t get it, certainly not selling me on their product.

For the future I would really wish for this industry that we manage to portray the arborist profession in a inclusive fashion – and will be able to leave this kind of cheap marketing behind us on a along with all other biases and stereotypes.

Sometimes you cannot help but wonder

A couple of months ago I was instructing a level two course.

These courses can be a bit tricky, as often as not you get groups with quite mixed levels of abilities and competencies – which can in turn make it challenging to ensure that you are not boring one half of the group whilst going way over the heads of the other half. I tend to simply stick to the syllabus of the course we are instructing, this seems to me to be transparent and fair, a sort of what you see is what you get-kind of deal.

And let’s face it, it has never hurt anybody to hear something twice.

This course was no exception, one of the participants obviously felt we were really wasting his time – despite the fact that in climbing it became apparent that there were significant gaps in his knowledge. Oh, it had never even occurred to me to think about it that way. No shit, Sherlock?! Ignorance, as they say, truly is bliss. And if you never ask any questions, yes, indeed you can comfortably recline in your fuzzy bubble of omniscience – as there are no questions to answer. But this is a long way from being proficient in an activity, or having a deep understanding.

Similar type situation the other day: we were working on a tree overhanging one of those outdoor street gyms. Soaring levels of testosterone and cheap chat-up lines à gogo. Not my scene, but hey, who am I to judge? Anyway, one of the guys “coaching” one of the women takes a break to approach me during the tidy-up – with a roll-up hanging from the corner of his mouth – and says that what we are doing looks pretty chill.

Errr, does it?

Yeah, he says, you would not believe all the things I have done in my life – without any formal training. I reckon I could do this. Formal training is all about making money, never about learning.

Gotta go, I said.

Both of the above are examples of the Dunning Kruger effect in action.

This is what Wikipedia has to say about this bias:

In the field of psychology, the Dunning–Kruger effect is a cognitive bias in which people of low ability have illusory superiority and mistakenly assess their cognitive ability as greater than it is. The cognitive bias of illusory superiority comes from the inability of low-ability people to recognize their lack of ability; without the self-awareness of metacognition, low-ability people cannot objectively evaluate their actual competence or incompetence. On the other hand, people of high ability incorrectly assume that tasks that are easy for them are also easy for other people.

The other day I was struck while watching an interview with John Butler, a highly talented Australian guitarist, of how it  illustrated the other end of the spectrum: the person conducting the interview said how he was under the impression that the musicians of the John Butler Trio were genuinely enjoying playing together. John confirmed this and went on to describe how he felt for the first time that he was slowly getting the hang of this performing in front of an audience business, in contrast to the first ten years of his career, where he had been terrified of being rumbled as not being good enough or a fraud.

Now you would have thought that a person who is obviously as proficient at what he does as John would not need to doubt himself like that – but the contrary is the case. The guys in the first two examples are less competent at what they do, this lack of knowledge and experience leads them to overestimate their actual level of ability, while a deeply competent operator like John has much more accurate tools to gauge his level of ability – and will therefore be less prone to stumbling into the Dunning Kruger pitfall.

Whilst being competent leaves place for self-doubt, it also equips you with better tools to assess your true level of competence.

Job opportunity

Besides being involved with treemagineers, I am also co-owner of baumpartner, a tree care co-op based in Basel, Switzerland.

From 1 October onwards we have an opening for a climbing arborist. Not too fussed about qualifications, we are more interested in finding someone who fits well into the team.

baumpartner has been up and running since 2000, almost all of the work we do is within a 20km radius, the work is a mix of residential and communal contracts. One of the attractions of working this way is that often you will be returning to trees you have worked on before and can assess the effectiveness of earlier measures performed on the tree. The work ranges from tree protection on building sites, all aspects of pruning and bracing, technical rigging, crane removals, tree planting and consultation.

Basel is in north-western Switzerland, right on the border with France and Germany. The city offers lots in the way of culture and entertainment, is easy to get around on a bicycle. The central location in Europe means you can hop in a car and get to loads of interesting places in a couple of hours.

There is a lot of cross-over from the other projects I am involved with, the company re-invests in new equipment and we have an interest in offering employees a dynamic, supportive and interesting work environment. baumpartner from the get-go has fostered a culture of level hierarchies, as well as a spirit of solidarity and looking out for each other, which is core to our vision of how people ought to work together.

As I mentioned above, we are not necessarily looking for the best of the best, rather someone who is dedicated and committed to delivering high-quality tree work, enjoys working in a team and is keen to broaden their horizon.

If you are interested or would like to know more, please feel free to send me a mail at mark@baumpartner.ch

Location, location, location

Sometimes knowing where you are is easy, especially in an urban setting: you simply use an address. Yet sometimes things are not that easy, you might be working out in the boonies – or you might be trying to identify that one, specific tree.

The folk at What3Words came up with a rather clever system enabling them to pinpoint locations worldwide with… three words (yes, the name is a bit of a spoiler). The location information is based upon a 3m x 3m grid, i.e. you can pinpoint a spot to within three meters, which is not bad – not the same accuracy as with GPS/ Galileo/ GLONASS-based coordinates, admittedly, but the What3Words system is very user friendly, you can install it on your phone, which makes it fast and easy to use.

The location of the Masters’ Challenge tree of this year’s ETCC in Thoiry (France), for example, is pots.rejoin.rocket.

The exact position of the Climbers’ Forum drop tower at the German Tree Care Days in Augsburg is right on the join between held.bricks.coaster and graduated.remember.trading.

You can simply enter the three words into the app, which is available in Apple’s app store or from Google play – or you can go to What3Words’ website and enter the three words there.

My impression is that far from being a mere gimmick, this has actual practical applications when a 3x3m resolution is sufficient to identifying objects with, where an address may not be available, for example, or the available description is not accurate enough.

I have no affiliation with what3words Ltd., I merely thought it was an interesting concept worth mentioning here – and that it might even be of use to someone…


I have mulling over the question of collective biases – shared inclinations or beliefs – for a while now. I think in regards to our industry, a good example for one such a bias is the way we consider knots.

Take the Valdôtain, or the Valdôtain Tresse, for example, ask around at a trade show or another industry event how people view this hitch. You will probably get answers in the direction of that it is a sporty hitch, not very reliable, touchy-feely or that it is mainly for competition climbers. It is also often even referred to as the Suislide Hitch, which is a bit sinister! All of this enforces the bias that this hitch is somehow only borderline safe.

Back when in the early days when I was competing in tree climbing comps, I would have probably agreed with this assessment. It was what I encountered using a VT, you were constantly managing the hitch to get just that sufficient amount of friction, that sweet spot to juuuuust about hold you, yet also to feed smoothly through the hitch during ascent. Often as not, you were having to massage the hitch into position before loading it to ensure half-way reliable grab function.

For years in our basic training courses we have instructed on the basis of the Hitch Climber configuration, but of course not using the VT, as this was not seen as being a beginner’s hitch, preferring to use the Distel or the Swabish in its place.

Essentially though, all of this was acting like a self-fulfilling prophesy and was feeding the bias that painted the VT is an unsafe hitch. In terms of numbers, the Teufelberger/ treepartner/ treemagineers testing on hitches did not show this to be the case. On the contrary, in the range of hitches which were tested, in fact the VT proved to be a highly reliable hitch with good grab function, passing the test criteria (23kN/ 3 minutes) we had defined for those tests with flying colours – this is on top of the test criteria already defined for CEclimb.

All of this is of course highly dependent to how the hitch is tied. The CEclimb user manual defines a VT tied with a 90 cm eye to eye sling with four coils and four wraps. This results in a highly reliable knot – under almost all conditions. Yes, evidently it has a higher base friction, but you are not sacrificing safety for short term gain. The function of friction hitches bases upon… friction, after all (duh).

Once you start considering an issue in this way, you start to realise how the views of a group of competent people can be tainted by bias: Take the business of training on a Distel or Swabish, for instance. Truth be told, when we opened up the discussion in our group of trainers, it became obvious that the novice climbers had been struggling with these hitches as the were not grabbing reliably. In the end we decided that an appropriately configured VT offered a much more confidence-inspiring, reliable basis to train on than the options we had been using up to that point.

So it turns out that the truth of the matter is that the VT is a knot whose performance is highly dependent on how it is configured – and that the industry was using it in a way which was biased towards minimal friction and maximum slack feeding ease. Which does not make for a very reliable hitch.

This all goes to show how biases can create blind spots and group think-dynamics that are not conducive to balanced, open discussion – and therefore ought to be challenged.