Climbing a mast (err, tree) using Prussik knots

SAWDOC

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I usually have my 18 stone ex-rugby playing friend to haul me up the mast when required. However, in preparation for single handed cruising, I thought I would learn how to climb the mast single-handed. Thanks to very informative posts on this forum, there was lots of experienced know-how to help me along.

There are loads of different systems one can try, but being the cheapskate I am, I did not want to spend dosh on some mountain climbing kit that might be very occasionally used. So use of two loops attached to a halyard using prussik knots seemed to provide the answer. One loop connects to the bosuns chair, while the second loop ends in two bowlines in which you insert your feet. Progress is made by standing on the feet loops taking the strain off the seat loop. Without any strain, the loop can be pushed along the halyard. One then sits into the seat and removes the strain from the foot loop. This in turn is pulled upwards. This "stand sit, stand sit" continues until you arrive at the height you require.

Simple but effective technique. Had I the strength to use it?

Boat being out of the water for the winter, I ventured forth to the nearest convenient tall tree, and threw a warp around a reasonably high branch. Two of my children looked on with great interest wondering what sort of crazy antics their old man was up to this time.

First effort saw them rolling around with laughter as dad twisted around inches from the ground due to poor length of foot loops unable to make any progress skywards.
Back to base for a new length of rope to use for the loop (the foot loop needs to be about twice the length of the seat loop) and hey presto a few minutes later I was well up the tree with the kids down below going "me next, me next!"
It is definitely something that requires practice as I found climbing the 5 metres or so I climbed quite tiring. But I was pleasantly surprised that it is fairly doable. A few more practice runs on the tree and it's up the mast with me!!
 
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... hey presto a few minutes later I was well up the tree with the kids down below going "me next, me next!" ...

Works well, doesn't it?

Just one word of caution if anyone's getting kids to do this (you may know already) - Make sure they DON'T hold onto the Prusik knot. If they get spooked and start clinging onto the knot, putting weight onto it, it can slide down the rope and jam against the other knot, or result in both knots sliding down the rope together. If this happens, the loops melt extremely quickly and you fall uncontrollably.

Obviously a back-up rope is best for kids, but when I've done this alone, I've hauled a climbing rope up the mast and tied into this every few feet (Prusiking up a halyard is easier than a stretchy climbing rope). I would be wary of tying onto a halyard unless the slack was kept to an absolute minimum, because it would bring you up too sharply if you did fall. I suppose a third Prusik loop onto another halyard would be an alternative.

Not sure I'd fancy doing it at sea :D

Andy
 
Works well, doesn't it?

Just one word of caution if anyone's getting kids to do this (you may know already) - Make sure they DON'T hold onto the Prusik knot. If they get spooked and start clinging onto the knot, putting weight onto it, it can slide down the rope and jam against the other knot, or result in both knots sliding down the rope together. If this happens, the loops melt extremely quickly and you fall uncontrollably.

Obviously a back-up rope is best for kids, but when I've done this alone, I've hauled a climbing rope up the mast and tied into this every few feet (Prusiking up a halyard is easier than a stretchy climbing rope). I would be wary of tying onto a halyard unless the slack was kept to an absolute minimum, because it would bring you up too sharply if you did fall. I suppose a third Prusik loop onto another halyard would be an alternative.

Not sure I'd fancy doing it at sea :D

Andy

Hi Andy,
Thanks for you comment.
I don't think it is a method suitable for kids. I have hauled up my 10 year old on the bosuns chair the conventional 2 halyard way to free a jammed halyard but other than that, they are limited in what skills they have. Didn't get your point about hauling a climbing rope up the mast - if the halyard is easier, why use the climbing rope?
 
Well - having a 40somethingorother foot mast to climb and needing to replace the VHF antenna last year I went out and bought 2 assenders for £80 ..

I hoisted a static line up the mast on the main halyard and having threaded it through a bar (of wood) in it tensioned it a little on the deck. This Bar is attached via a longer line to the bottom ascender - it is what you stand on - rope loops will crush your feet.
The top ascender was attached to my trapeze harness (haven't got a bosuns chair) and the topping lift was used as a safety line with SWMBO and a winch on the other end ...

in 2 minutes I was at the top of the mast - easy and efficient climbing - especially with the top/bottom attached static line and the bar running up and down it ... it meant all my standing effort actually went into standing up rather than trying to keep feet pointing down ...
Oh - with the Bar of wood I could stand at the top of the mast for over an hour whilst we disconnected a second wire and threaded both down the sheeve ...
Final point - yes you can get seasick at the top of the mast! But I did make it down in time!
 
Er blimey - short change your kids why don't you!! At 10 I had my own ropes for hauling myself up/down & around the trees in our garden ...
I was also helming a racing dinghy at that age ... which as my Dad had just got himself a bigger boat meant I had to rig it all too ...

Limited in their ability my arse!
 
Prussiks are very useful for all sorts of things. I've mainly used them for climbing and mountain rescue exercises etc, but they have lots of sailing applications too for things like taking the strain off a jammed rope. For rope-ascending, French prussiks are easiest to tie and slide upwards much more freely. You literally just put a few turns of your prussik loop around the rope, clip a karabiner through the end bights and attach whatever you want to that. They lock just as well when weighted and slide upwards more easily as there's no potential for them to lock. They're also easier to do one-handed etc.

Steve.
 
Er blimey - short change your kids why don't you!! At 10 I had my own ropes for hauling myself up/down & around the trees in our garden ...
I was also helming a racing dinghy at that age ... which as my Dad had just got himself a bigger boat meant I had to rig it all too ...

Limited in their ability my arse!

:D:D Honestly I try not do! Enjoyed your post.
 
... Didn't get your point about hauling a climbing rope up the mast - if the halyard is easier, why use the climbing rope?

I was just using the climbing rope as a safety back-up - Once I'd ascended 3-4 feet up the halyard, I'd take a loop in the climbing rope and tie it off to my harness. Every 3-4 feet of climbing I'd re-tie the knot to get rid of the slack. The idea was that if I fell, the climbing rope would catch me - relatively gently because it is designed to absorb energy (whereas halyards definitely aren't!).

I didn't say so, but the other reason was to use it to abseil down again (I know my descendeur works with my climbing rope).

Both my kids have messed around with this set-up (under supervision) on a tree in the garden when they were +/- 10 years old, by the way :).

Andy
 
I don't think it is a method suitable for kids.
[...]
they are limited in what skills they have.

Scuse me! I'm not sure what age I was when I learned to prussik, but it must have been under 9 as we moved house at that point.

I probably couldn't do it a quarter as well now as I could then.

Pete
 
Scuse me! I'm not sure what age I was when I learned to prussik, but it must have been under 9 as we moved house at that point.

I probably couldn't do it a quarter as well now as I could then.

Pete

Right!!
I will instruct the two older ones on the art of prussiking up to their tree house (soon as I know how!) and we will see how they get on. As you have experienced, they will probably do it with less difficulty than this here lump!:o
 
This all sounds interesting. I usually just climb up hand over hand (very grippy wellies and gloves) and get somebody to take up slack on the halyards - and see if they can keep up with taking up the slack in two halyards as quick as I climb. (And yes I do make it to the top of my 47 foot mast without being pulled up).

But moving on to Prussiks... was wondering the difference between the French and otherwise.

http://www.needlesports.com/advice/knots.htm

This climbing site has nice clear pictures of both the French and Kleimheist Prussik knots and also gives reasons of one over the other for prusiking up a fixed rope. I must admit the Kleimheist does look less prone to falling over itself. At least the website has nice clear pictures - I hope they are correct!
 
But moving on to Prussiks... was wondering the difference between the French and otherwise.

http://www.needlesports.com/advice/knots.htm

This climbing site has nice clear pictures of both the French and Kleimheist Prussik knots and also gives reasons of one over the other for prusiking up a fixed rope. I must admit the Kleimheist does look less prone to falling over itself. At least the website has nice clear pictures - I hope they are correct!

They don't have a Prusik knot, though - try here. :)

For what it's worth, I usually use Klemheist knots if ascending a rope - very occasionally a Bachmann if the combination of rope & loop seems prone to jamming, but I don't trust them as much. I would use a Prusik knot for taking the load off a line, though (cos I learnt it before I'd heard of a rolling hitch ;) )

Andy
 
prv and Misterg - yes, what you both posted is what I knew as the prusik knot. I only looked things up because steveparker mentioned a French prusik.

The unusual ones (on needlesports) look interesting though.. I wonder if they are worth a try at the weekend.
 
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I would use a Prusik knot for taking the load off a line, though (cos I learnt it before I'd heard of a rolling hitch ;) )

Surely a rolling hitch is much quicker to tie though? I have to throw about a dozen on to fix a tarpaulin over KS's cockpit while working on her at the moment.

Pete
 
Surely a rolling hitch is much quicker to tie though?

Handy to have a few prusik loops ready made rather than having to tie them in a hurry. They're very quick to deploy if you've got them handy. Most climbers carry a few on their harnesses in case of whatever. They're seriously versatile for anything involving ropes. But I agree a rolling hitch is superfast. But then can you tie one one-handed? :0)

Steve.
 
I used to use prussics. Going up was great but one day they siezed on the way down and it took me nearly an hour to get down on deck. Never done it since - a couple of ascenders works much better.

Even they have their problems. I once left too long an end from the bowline attaching the ascender to the bosuns chair. The end got caught in the ascender on the way down and when I came to put my weight on the bosuns chair the end stopped the cam gripping the halyard and I nearly fell out of the chair backwards.
 
I used to use prussics. Going up was great but one day they siezed on the way down and it took me nearly an hour to get down on deck.

That doesn't happen with French prusiks. If you wear a harness with one prusik to the waist loop and then two stirrups both to prusiks, Bob is your levitating uncle...

Still always got to use with care, obviously. The thing is to practice with them until you're comfortable.

Steve.
 
This is indeed impressive stuff, shinning up rope, one handed knots, it all comes flooding back when, once, I could do all this. Even went on a climbing course to RAF Digby in Lincolnshire. Oh, happy days.

To go up now I use a ladder hauled up with the main halyard. When the ladder is being stored it is lashed along the rails port and starboard (did I mention that it is a two section ladder). It is also useful as a boarding ladder when we go aground on a falling tide (did I mention that mine has bilge keels). It is also used to assist fendes when along side sheet pile walls.

73s de

Johnth
 
doing up the mast

many times i have climbed the rope, to go up the mast, either with prusic knots, either with ascenders but going down, create a slight problem! solve everything with device - figure 8 !
very usufull to go down, abseiling ! once, i complete the job upside, connect the figure 8 to the rope and harness with carabiner, disconect the ascender and easy sliding down !
here is the link for figure 8
http://www.pinnaclesports.com.au/product_info.php?products_id=695

regards
 
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