Xerxses

http://arbtalk.co.uk/forum/general-chat/23278-bs-3998-2010-tree-work-recommendations-stock-now.html

And greenhouses....why do people leave them laying around in their gardens? Especially in the lz:s?

But he was a highly skilled contractor taking every precaution he could? Proper PPE, perfect cuts, not bigger size of timber then he knew he could handle... AND a 3strand withplenty of lads to give it a good pull:001_rolleyes:

Just my point! There was nothing wrong with the kit just not enough people tugging the rope! He even had some of that red special twine for his rope. Why did this happen:confused1:?

I think he should have had more people on the rope....

Some 3 strand hightec lovering kit and the lads....what can go wrong? [ame=http://www.youtube.com/watch?v=q2iqI2JN2D8]YouTube - Chaos Baumfällung - oder Gewächshaus stand falsch[/ame]

Some 3 strand hightec lovering kit and the lads....what can go wrong? [ame=http://www.youtube.com/watch?v=q2iqI2JN2D8]YouTube - Chaos Baumfällung - oder Gewächshaus stand falsch[/ame]

Nah, theyre crap...

No! We have this old proven insulation fhing in ma bap.... Tripple glass and centralheating, sitting here enjoying my morning coffe just in boxers....and its -17C outside!

Well I shall be there and defend you....!

It has been said before....

Youre welcome! Yes Roni its the updated one.

Just a heads up! Jo is doing a special price if anyone is looking to update... 50% discount!!! Treesource New Titles

Ihavn't found a translation and only one of the papers...google translate? 0ff240cc-ca87-4b5f-bce9-c44900ffabc9.pdf

That is the best pic I have ever seen of treework!

Cool! So youve started now as well!!!!

video-hevea

Forgot my camera at work....but here is a link to the website with the rollotube. Rollotube hevea. Petit outil très utile pour le démontage des billots en 0,50 cm

If you were to calculate the force needed to pull this tree over you would find that you need more force due to the low backcut as you are lifting the tree and the high hinge is deflecting some of the force. Do your forcetriangles and you'll see... and then adding the negative force of shearing the wood of the stepcut.... This tree would have been "easy" to wedge with a couple of "lowlift" wedges and virtually impossible with your stepcut technique. If it is a matter of safety? Well its a lot harder to calculate when the tree is going over as you need a lot of force and the shearing is so different from tree to tree (e.g. growingpattern species and temperature) that the tree, as you reach the force needed to shear the wood, the tree is going to suddenly "pop" and fall rather quickly whereas the conventional technique allows you to wedge and apply force to the tree and if needed cut the hinge a bit more. The tree will "tell" you (as the fibres starts breaking you will hear the cracking sound) and you will have plenty of time to move away from the tree using the safe escape route. There is also a possibility to overcut the hinge as the fibers often isnt straight in the butt (as you point out in the first video) with the risk of ending up with a "true" stepcut, the tree snapping of the hinge and sit down on the stump. I have experienced this with small trees as i have made a sloppy backcut () and the tree has broken off the hinge and still stood on the stump, it isn't nice and a real wakeup call as it can fall in any direction...! They have only been really small and easy enough to push over in the desired direction. I wouldnt want this to happen to a big tree!!!! Its great that people try out different techniques cause thats how our trade develops, but there is a reason why a level backcut is advised! There has been a lot of research in this field at the Swedish Forrestry Researchcentre where they looked and trialed different kinds of felling cuts They looked at the fibrebending in the hinge as the gob were closing and found that a level backcut gives the highest bending ratios in both soft- and hardwoodfibres. Stay safe and dont put your self at risk in order to "develop" new techniques, espesially newbies... wanting to do "new" cool things that werent taught in school!

I'll try to rember to take some pics today. I have two, a short and a long one. The metalrod used to be a part of a curtainsetup.... It was a sliding thing and the rod was attached to the top of the curtains to make it easier to slide them sideways, if you get my explanation? I had a picture in my head of this aid and just stumbled upon this rod in my mums house:blushing: it just happened to be 1.3 mm! The idea came to me when I watched a film about the pyramids and old Egypt and the way they were rolling bigblocks of stone on timber. I really thought I had put pictures up here before?!? Byt I just searched and cant find a post... so I must have forgotten to do so.

I think that one has been put to test and found not suitable for fallarrest situations as it either ripped the outer braid or cut the whole rope... (The one with the ridges and not the little spikes)

Thats how I understood it.

I use armprotection on all them dodgy handhelds...:sneaky2:on onehanded 020 dismantlings!

Spruce Lee?: