Hitches and square fence posts.

Hello.

Does anyone know of a good hitch that will grip square vertical fence
posts and not slip up or down? My daughter wanted to have a go at slack
line/ tight rope walking, but every knot I tried seemed to slip down
the two posts after a while. In the end, the most effective arrangement
was to form prusik loops on each end of my climbing rope and use a
trukers hitch to tighten, but even this would eventually slip after a
time. I think the corners of the fence post were preventing each loop
of the prusik from tightening. Are there any specialist knots for tying
to odd shapes such as these?

Thanks.

S.G.

somebody schreef:

Hello.

Does anyone know of a good hitch that will grip square vertical fence
posts and not slip up or down?
...
Are there any specialist knots for tying
to odd shapes such as these?

Thanks.

S.G.

hi steve (?),

a line / rope that is wiggling, is tapped at, is slack
and then the hitch will shift, come loose, slip
yes, that is normal behaviour
not just on square vertical posts


the square form of the post adds to the slipping
because there is not much contact area for friction
between post and rope
(square is not realy an odd shape ;-)


when you stick to a knot as solution
there should be multiple round turns in it for friction
you could go for another hitch (ossel knot? double pile hitch?)
or experiment with alternatives for prusik knots (klemheist, french
prusik)
then you should add to the friction too, I suppose
add pieces of wood, wrap canvas, use webbing

I would go for a (square) lashing, tie a ring to the post
or make a seizing, tie a timble to the post with thin twine
or bolt an eye to the post

or when you want to stick to one hitch
shave and round the corners or replace the post


besides: a tight rope without much stretch
loaded sideways ( a person on a walking rope )
might break easily
because the load in the rope is much much higher than the weight of the
person

Ben

somebody schreef:

...
I can remember, from years ago, making a rope ladder soley out of a
single rope but can no loger remember how,
...
Sorry, I realize this isn't meant to be an 'ask the experts' web page.



hi Steve,

don't apologise for asking in a newsgroup

http://www.geocities.com/roo_two/ladder.html

and don't knot your walking rope to a wall
a brick building cannot take that
option: make an anchor, like a deadman in snow

knot sorry,

Ben

On 13 Jul 2006 11:48:20 -0700, "somebody"
wrote:


Thanks Ben. I really should have been able to figure that out by
myself. :-} I managed to find a couple of really big slings from my old
climbing gear which seemed to have solved the problem. I made prusiks
with about ten turns around some extra bits of timber and tied into
biners. Brings back old memories. Now I'e just got to remember
slackline walking. You're right about the tight rope thing. There's no
way I can pull it tight enough to take anyones weight without the rope
snapping or pulling the posts out. That one will need a bit more
thought. Maybe ratchet straps or something tied into wall fixings.

I can remember, from years ago, making a rope ladder soley out of a
single rope but can no loger remember how, nor find a web site that
includes it. I saw one recently at a playground but didn't look to see
how it was made. Any ideas?

Sorry, I realize this isn't meant to be an 'ask the experts' web page.

Steve.

Hi,

There's a single line rope ladder in Hervey Garrett Smith's
"Marlinespike Sailor", if you could borrow a copy from a library or
such like.

A Google seach of "Rope Ladder" found this website on the first page,
which is much the same as above:-

http://www.geocities.com/roo_two/ladder.html

After middling your rope, use alternate ends to form the rungs to keep
each side the same length

Like most things, it's very simple if you see the diagram, but a bit
difficult to describe.

Best Wishes

Steve Mason




--
Posted via a free Usenet account from http://www.teranews.com

Stephen Mason wrote:



Hi,

There's a single line rope ladder in Hervey Garrett Smith's
"Marlinespike Sailor", if you could borrow a copy from a library or
such like.

A Google seach of "Rope Ladder" found this website on the first page,
which is much the same as above:-

http://www.geocities.com/roo_two/ladder.html

After middling your rope, use alternate ends to form the rungs to keep
each side the same length

Like most things, it's very simple if you see the diagram, but a bit
difficult to describe.

Best Wishes

Steve Mason


Thanks Ben and Steve.

I made the ladder yesterday out on my lawn (quite surprising how mush
space you need to do it properly) and it turned out to be a lot easier
to do than I originally thought. I used an old 11mm climbing rope and
was able to use my knee to hold the rope still while I made the turns.
The first few 'rungs' were quite difficult because there's so much of
the two working ends but I found that if you keep both neatly coiled
it's not so bad. I managed to get 15 rungs about 500mm apart with 8
turns on each rung. Unfortunately, because of the elasticity of the
climbing rope, when I secured it between two trees (don't worry I
protected the trees with slings around canvas) I had to keep tightening
it after it took some body weight. Consequently the rungs are now only
just wide enough for me to get one hand on, even with 8 turns, and I
doubt very much whether I'll be able to undo it. I don't mind
though. I don't think it will stretch any more and I think I'll
keep it as a rope ladder. If I did it again though I'd use a static
line. It's a shame rope's so expensive where I live.

Thanks again.

Steve.

somebody schreef:


I used an old 11mm climbing rope
...
the rungs are now only
just wide enough for me to get one hand on, even with 8 turns

Thanks again.

Steve


hi Steve,

8 turns with 11 mm rope
just wide enough
are you surprised?

knot on holiday,

Ben

somebody schreef:


I used an old 11mm climbing rope
...
the rungs are now only
just wide enough for me to get one hand on, even with 8 turns

Thanks again.

Steve


hi Steve,

8 turns with 11 mm rope
just wide enough
are you surprised?

knot on holiday,

Ben

Ben wrote:

somebody schreef:


I used an old 11mm climbing rope
...
the rungs are now only
just wide enough for me to get one hand on, even with 8 turns

Thanks again.

Steve


hi Steve,

8 turns with 11 mm rope
just wide enough
are you surprised?

knot on holiday,

Ben

Yes!! ;-)

The diagram only had four turns, I thought I'd be ok. ;-))

Seriously though, this is pretty much all new stuff to me. That's why
I'm consulting the experts.
I'm on a mission to how much I can learn for free on the internet while
the telly's on the blink.
I've undone it, I'll do it again properly.

cheers

Steve.