Beech Removal-Traverse

[Big 'Ammer]

Very interesting and informative as usual Reg.

 

I too am interested in the debate of tensioning the running line at the top or at the bottom and would like to know more.

 

Second vid about 1.30 ish, nice move using the weight of the first piece to pull over the second.

[western]

nice work dude:thumbup:

[mistahbenn]

Between you and me has Andy put weight on?

[High Scale]

Very nice.

[Mozza]

Quality Reg

 

Ive said it before and ill say it again, I do like that Dakota pal

[mistahbenn]

Mozza its a Ram I think.

[Mozza]

Mozza its a Ram I think.

 

Its not matey

 

unless reg has swapped in the last few months

[Tom D]

Nice work Reg, how do you rate the orange topper?

[Mike Hill]

Ok, heres where I was coming from.

 

Rope tied to top of tree, load hanging directly underneath anchor = 1 unit of load

Rope tied to bottom of tree, run through pulley and load hanging directly below pulley = 2 units of load.

 

Rope tied to top of tree, tensioned for speedline at fall of 30 degrees to horizontal exerts a certain amount of side loading on stem.

 

Rope as above but through pulley at top of tree and tensioned at base of tree exerts less side loading? but more overall force, although some of the forces are redirected.

 

Rope run from ground level up to top pulley, then down again at the same angle, and tensioned from ground level so the tree is in the centre of an equilatral triangle = more force on the line, but most of the force is redirected straight down through the stem, so the loading on the tree is closer to my first example.I could be wrong about this, it is a genuine question.

 

This is how almost all Spar Trees are rigged in Skylining operations.

I never saw any break,but know it did happen,some of the Trees were subject to 50plus ton of dynamic load.

[Dean Lofthouse]

Taking it further, franks method would work (in reducing sideways pull) but the resulting downward force on the tree would be immense far greater than from simply lowerign a load, so the tree could fail due to the compression force

 

It would only be around double if I'm thinking right but a stem loaded straigth down will take easily 100 times more load than a stem loaded at 90 degree or even 45 degrees I reckon, otherwise pit props would be useless