rigging SWL

[Peter]

The friction in the anchor point transfers a high proportion of the load to the cover, especially during shock loading.

Using a pulley means that the rope can move easily over the anchor point and the load is shared evenly between core and cover.

[TREELINE]

The friction in the anchor point transfers a high proportion of the load to the cover, especially during shock loading.

Using a pulley means that the rope can move easily over the anchor point and the load is shared evenly between core and cover.

 

cheers 4 that.

[Blakes 7]

Treeline,

I think you have just proved that the piece of paper is of some use, as this is just one of the areas covered in the NPTC assessment.

Don't under-estimate the importance of training, but experience is needed to implement correct techniques.

[Rupe]

There are many factors that become a problem when natural crotch rigging! I'm not surprised your loler inspector failed the rope if its been used it that way.

 

The whole point of these ropes is that they can carry these large amounts of weight if that weight is distributed evenly along the lenth of the rope you are using. so if your are natural crotching the amount of friction at the crotch is holding a lot of the weight, which means that the weight of the log/branch is held by the bit of rope between the log/branch and the first crotch it passess through.

 

So the rope is being used unevenly, your loler inspector would pick up on that straight away and bin the rope. If he's a supplyer he should be trying to sell you pulleys.

 

We used to get away with natural crothing all the time as there was no alternative but that was using 24mm and even 32mm three strand ropes.

 

We are so lucky to have these superior 14mm and 16mm ropes now with far more strength than our old twist ropes, but spending that much money on a lowering line and then natural crotching it is like buying a porsche and not putting any oil in it!

[Rupe]

DISCLAIMER: I would never buy a porsche!!

[Bundle 2]

Worthwhile point I think and here are more reasons to move with the times if you are involved in treework....adopt as progressive attitude as possible towards your craft but not only that, to your techniques....(?)

 

 

Default BS3998:2008 Draft Section 7 - General

Hands up who like paperwork?

 

7.2 Instructions prior to carrying out tree work.

 

...The contractor should prepare a risk assessment and method statement (including quality of

work), and ensure there is a clear written specification of the work.

 

You've got TPO consent on the condition that you follow BS3998:2008... wheres your method statement then? Reasonable?

 

Bye bye to natural crotch rigging...

 

7.10 Damage caused to trees.

...Where a tree, or part of a tree, is used as an anchor or to redirect a load, precautions should be

taken to avoid damaging it (see Annex J).

J.1 General

Using a tree as an anchor point applies pressure that can cause damage to the cambium. There

are three applications where a tree may be required as an anchor point:

a) to assist with felling a tree in chosen direction;

b) pulling a tree (or stump) out by its roots;

c) when using rigging systems.

 

Better buy more rigging gear to comply with the new draft 3998?

[Bundle 2]

DISCLAIMER: I would never buy a porsche!!

Strictly stolen eh....!!!

[Rupe]

Strictly for girls or men with problems....

[Dean Lofthouse]

Strictly for girls or men with problems....

 

If it doesn't pull 3.5t then it's not a car

[Rupe]

Well I have a car that doesn't pull 3.5 ton but it does work for its keep and there is space for dogs, kit etc