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cobra® Tree Cabling - Tutorial Video (English)
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- Опубликовано: 6 авг 2024
- In this tutorial, we will explain how to correctly assemble cobra tree cabling and how to use it in a tree in accordance with ANSI A300 and German ZTV standards.
We hope that our tutorial gives you a comprehensive insight into our products and their use.
english version: 1.0 (13th December 2011)
PLEASE NOTE: There is a mistake at 5:30. The narrator is saying "diamter" instead of "circumference" when the length of the anti-abrasion hose is getting defined.
The 'best' time to install a cobra tree cabling is when an arborist is up in the tree for pruning because this reduces the effort. But else I would say that spring and summer would be a good time to install cobra because after foliation the branches are the farthest apart from one another. This makes it easier to install the cable with the proper length. In Winter you need to install cobra wih more slack.
Great video, but why no safety glasses!!
at 5:30 when they said "determine the length of the anti abrasion hose which should be the diameter of the stem" did they actually mean the word "diameter" or did they mean to say the word "circumference". because i think they ment to use the word "circumference" . its a small technicallity but it obviously makes a big difference. because the anti abrasion hose if only the length of the diameter then it wont even go half the circufernece and the rope will rub and then there would be no room for growth in diameter cause the extra leghtn of the anti abrasion hose would already be un accomidating. right?????????? damn it. >:(
Unfortunately I deleted a post of peter hamilton =( and found out that I can not restore it. But here is it as a copy from the RUclips e-mail I got
"Recently I removed a Cobra system that was killing both codominant stems of a magnificent heirloom red oak. It's a nice idea but remains a candidate technology as far as I'm concerned..."
In order to avoid the second case it is important to splice the cobra in a adaquate distance from the stem. The distance between stem and splice should be the half of the diameter of the stem (see 06:15 in the video).
If you follow both recommendations then cobra will not ingrow and will prove that is a technology that helps arborists to preserve old trees.
Finally I will offer you and anybody out there to contact us in case of a problem because we only may help you if we know your problem.
So by these instructions if the branch has any included bark you should always use the static system ?
Use a static system in any case of a crotch between codominant stems (included bark) that starts to crack. But not all codominant stems need necessarily a static system. They also can be supported by a dynamic system that helps to avoid splitting.
Please note that whenever the narrator is saying diameter, he actually is referring to circumference.
Hello Martin, after checking the video again I can not find any mistake. Each time the narrator is saying "diameter" he means "diameter" and not "circumference". (There has been a mistake in the past at 5:30 but we corrected this). Please can you explain and describe where and why you think it is wrong? Best regards
Hello Martin, my fault. We have corrected the mistake at 5:30 in the English video when we created the French, Italian and Spanish translation. But unfortunately we have not updated the English video here in our youtube channel. But this is the only point where the narrator is saying "diameter" instead of "circumference" by mistake.
I believe the narrator also mistakenly uses "diameter" at 5:00 in the English version when describing the length of insert to be used. You have about a 9" diameter branch "2/3 the branch diameter" would be a 6" insert when the insert looks to be closer to 18" or 2/3 of the 27" circumference.
Is the insert of the shock absorber the only difference between static and dynamic installations? Would using a comealong to lightly pull codominant stems together be a good way to make a static installation taught? I just don't think hand tightening would be taught enough??
There are two differences between static and dynamic installations.
- First is the shock absorber which is not inserted in a static cabling.
- Second is the breaking load of the system. For static installations you use the next stronger system compared to a dynamic installation at the same branch diameter, e.g. to secure a branch with 40 cm at the base you use cobra 2t with shock absorber as a dynamic installation or cobra 4t without shock absorber as a static installation.
Furthermore it is fine to lightly pull stems or branches together to install a static system.
In order to avoid the first case we recommend an periodic inspection in accordance with the German Tree Care Standard „ZTV Baumpflege“ and the American ANSI A300 (Part 3)-2006 (see page 27 ‚34’). In practice a inspection every 1-3 years (depending on the condition of the tree) has been proved as sufficient.
If the inspection points out an close-fitting anchor loop then the connection can be easily adjusted to the secondary growth of the branch by releasing the growth reserve loop a bit.
Check out the cobra tree cabling system. They thought of this shock load problem and came up with a cool way to get around it. Pretty cool product, only downside is that it girdles the branches to secure the cable.
Haven’t tried it personally but it looks legit 🤷🏻♂️
日本でのコブラ製品群販売を東邦レオ㈱から行う予定で調整中です。
樹木力学の理念に沿った製品ですので、末永くよろしくおねがいします。
資料提供ありがとう、ピービーエス、ゴフナー代表。.
What's the loop for? Why not just stuff the end of the rope inside the rope and leave it there pulling out a little as the tree grows?
Hi Chris,
the loop has two functions. Firstly you can pull on it to tension the system during the installation and secondly it is a proper way to keep some cable as growth reserve.
Sure it is possible to stuff all the cable inside but then you need more space between the branches. Also you may let the growth reserve hang loose after the splice. But in our opinion it doesn't look as proper as a loop.
Kind regards
Hi! Is there any system to hold a trunk which is broken and opened? The tree is a "Tipuana tipu" dap 60cm x 14 mt high. It has a well structured crown, and the cracking is in the middle below of the trunk. It would be a pitty to remove it because of its shadow at the entrance of a Club....but may be dangerous also if only trim the crown to reduce the weight. What would you suggest? I m trying to post the photo, but I can´t. Thanks a lot.
Hi, please send us an e-mail with photos and we will take care of your problem. Thank you very much.
@@cobratreecabling is this info@treestuff.com? I ve just sent another situation. Thanks
When would you say the best time of the year is to carry out this operation?
the time of year shouldn’t matter- but if you’re dealing with a deciduous tree you need to factor in the additional weight if you’re installing when the tree is dormant.
I guess with ‚killed’ you mean ‚killed by ingrowth’, don’t you? If so then it is sad to hear that a cobra has ingrown. This may happen for two reasons. Firstly when a cobra was not inspected during its service life and secondly when the cable had been spliced to close to the stem.
He said "foilage".... aaaa-hahahahahaha! Not an ISA Certified Arborist, is he..
Why are you systematicly use an woman for your videos ? This is Steel a man-job and have to steel like that.
We are very surprised that you are feeling so upset about a female arborist in a video. She is a very good arborist and has won the German Tree Climbing Championship a couple of years ago. So why not using her? We never do not discriminate our fellow human being!