Beginners guide to rigging.......

[tuttle]

[/b] Half hitch with a smiley cut out behind to stop the rope sliding down.

 

still can't work it out, have you got a picture?

[ContractArb]

Dynamic rigging? is it governed by the MBS of your kit? /QUOTE]

 

"This involves dropping pieces into a rigging point below the wood being removed. Due to the extreme forces created in dynamic rigging situations, care should be taken to ensure that all components of the system have safe working load limits sufficient to the forces experienced."

 

Taken from http://www.sherrilltree.com/Learning-Center/Rigging_3/Rigging-Systems

[Paul Smith]

I think this thread is great, could do with a few more detailed sketches.

 

I have a couple of questions:

 

1. Dynamic rigging? is it governed by the MBS of your kit? or lower depending on size? for example is 11mm rope lowering 80kg lumps with a 2ft drop classed as dynamic?

 

2. If you not using pulleys and rigging slings, how would you go about lowering the stem pieces when dismantling? as there is no natural crotch remaining etc.

 

1. Don't use Amsteel blue or variants of!

2. Use pulleys and tie to the stem. Do not have hardware when negative rigging the pieces, the forces could be huge and the cycle to failure rate on the hardware is not good! Modern double braids should be used with pulleys

[Le Sanglier]

still can't work it out, have you got a picture?

 

Not smart enough! but imagine using a half hitch instead of a pulley and cutting out a small gob behind the hitch to act as a false crotch to prevent downward movement.

I am sure someone here can provide a diagram. It was actually taught as standard practice in the early nineties.

[tuttle]

1. Don't use Amsteel blue or variants of!

2. Use pulleys and tie to the stem. Do not have hardware when negative rigging the pieces, the forces could be huge and the cycle to failure rate on the hardware is not good! Modern double braids should be used with pulleys

 

I use amsteel 11mm whoopie slings, they work great and totally unaffected by dynamic rigging.

 

I would like someone else to use the same to prove the point.

 

Some video evidence coming soon......

[Paul Smith]

I have seen it melt. It's strong but not good with friction and heat. The manufactures don't recommend it's use.

[tuttle]

I have seen it melt. It's strong but not good with friction and heat. The manufactures don't recommend it's use.

 

how did it melt?

 

for fun, I put the sling around the tree, with pulley attached, did nothing special, left it a bit slack, dropped 10 lumps.

 

checked it, not a blemish.....

[Paul Smith]

how did it melt?

 

for fun, I put the sling around the tree, with pulley attached, did nothing special, left it a bit slack, dropped 10 lumps.

 

checked it, not a blemish.....

 

Friction. It will fail on you, good luck!

[Jake Andrews]

Pauls right, that seems like alot of force and friction =heat.

 

Nice test tho, bet it was fun:biggrin:

[tuttle]

tomorrow i will post pics of the slings, they are unbeatable for what they are, give them a try:thumbup: