Many climbers choose to use double or half ropes when trad or multi pitched sport climbing. However the whole single versus double ropes is not necessarily that simple.
Single Versus Double Ropes for climbing
Approximate diameter 9mm to 11mm
Easier to belay on one rope
Easier to hold a fall so good for beginners
More likely to get rope drag
Can only retreat half the rope length at a time
Can be used on its own
easy to use on straight up climbs
Harder to managed on wandering lines and traveses
High impact force cause by lack of stretch
can leave second with nasty pendulums
Approximate diameter 7mm to 9mm
harder to belay two rope simultaneously
Harder to hold falls on skinny ropes
less likely to get rope drag
can retreat the whole length of the rope as you have two of them.
Have to be used in pairs
not good for indoor or single pitch sport climbing
Easy to use on a straight up route
Easier to managed complex wandering routes
lower impact force cause by stretchier thinner ropes
can help protect second whilst traversing
Belaying with double rope
Belaying with double rope takes a lot more skill, as effectively you can be taking in on one rope and paying out on the other and vice versa. As such getting sed to belaying on double ropes will take time and most importantly practice.
Belaying with a double rope exercise
At the base of the crag or at home have a practice using double ropes by attaching the belay device to both ropes and having a friend randomly ask for slack or to take on both ropes, as well as individual ropes.
once you have the basic then start making it more complex, so to test you ability. The key is throughout the whole exercise to never let go of the dead rope. Can you pay out with one rope and then take in with the other only to reverse the whole thing in a moment?
Once you have master this try using double ropes for real, but on a climb that is really easy for everyone, bit leader and second who is belaying. As this is about both leader and belayer coming to terms with the extra rope.
When you are leading with double ropes there instantly become many different ways you can use them. As do you keep one for the left and the other for the right or do you mix it up? Often it is hard to tell what is best unless you look at the route and make a plan to manage the ropes before you leave the ground. You can also ask the belayer for advice as they can sometimes see the bigger picture.
There are many different type of climbing rope, as the article at the bottom will highlight in hopefully humorous way just how bewildering it can be. Starting out though all you need to know is there are two main type of rope: Single and double ropes.
In the main beginners want to start out with a full rope, as it can be used on it own and will make rope work a lot easier to start with. It will also last longer than a half or double rope. You best bet to start off with it to go for either a 50m or 60m. Also don’t go to thin as a standard single rope is around 10.5mm, any thinner and it won’t last as long. Unless you plan on going out in winter then you won’t need a dry rope treatment either.
Single Versus Double climbing ropes
Single ropes are easier to use sports climbing and indoors and for easy trad climbing. However if you progress in trad climbing you will need to consider Double or Half ropes, as these are thinner and help reduce rope drag if use correctly and can allow you retreat a full rope length off if necessary.
Length of climbing Rope
Ropes can come from 40m to 80m. Dependant on what you are using it for then different lengths are requires. Indoors most walls are OK with just a 40m rope. Outdoor sport climbing you may need a 80m rope in some places, although many ropes are only 30m high so you can get away with a 60m rope. It may be worth see what you local sport climbing venue is like for pitch lengths before buying a rope.
In trad climbing I would recommend a 50m any longer and you will struggle to carry enough gear. If you are a more advanced trad climber then a 60m climbing rope will be much more useful, especially on alpine length routes for abseiling retreats and descents.50
Buying A Rope – Story
So I haven’t had any half ropes for some time and needed some for work decided to head to V12 Outdoor to buy a pair. As a qualified and experience outdoor professional I naively thought that this would be an ‘easy’ job. I walked in with the idea of seeing which was cheapest and going with that, however I hadn’t really thought the whole thing through. As I start looking at what I can only say is a vast array of ropes of nearly every conceivable length, colour of the rainbow, thinness, rating, treatment and brand.
My first problem a common one for men was a question of length, I turned to my friend and said that “50m is for girls”, he said “but my ropes are 50m”, “exactly” I said. Now 60m is a good length but recently in Spain I had been climbing on 70m half ropes. These things are so long I swear you could do a retrievable abseil off the moon.
Then I remember that I was going to go sports climbing this winter and maybe I would need that 70 or even 80m full rope to lower off some of those long routes. This basically then made the whole decision making process a whole load more tricky, as I picked up a pair of Jokers, the first rope to be rated as a both a single and a half rope. At just over 9mm in diameter it wouldn’t be the lightest option.
Then someone piped up have you considered the triple rated rope? Well of course I hadn’t as I never even knew one existed. A rope that could be used as a single rope, half rope and twin rope. However these were not cheap, about £200 a rope retail price. I also think that these ultra thin single ropes are not what I need, I seem to hammer kit and a thinner rope in my experience mean they wear out quick as the sheaf by the very nature of the thinnest is, well, thinner.
Despite this I felt that the flexibility of having a two ropes does all approach would be great, so asked to have a look. I was then asked do I want the new or the old dry treatment. The old was just a treatment to the outside of the rope where the new apparently was to the core and the sheaf. At the point my head near exploded, as to be honest ‘dry’ treatment to me seems like selling snake oil, as whilst yes it is water repellent, in a proper downpour in wales you are having a laugh if you actually think it is going to work for more than two minutes. I have seen the treatment literally wash off the rope on the first soaking.
The price of two multi rope made me think about getting one of these thin multi ropes and one ‘normal’ half rope. Given there were two types of multi rated ropes I found and then many more choices for simple half ropes. Anything from 8.7mm to 6.9mm, but another problem I have had is using the thinnest diameter ropes of around 7mm in a guide plate and having the plate fail to lock as the ropes are too small for a normal sized belay plate, which means you need new belay plate as well. On the plus side at least this eliminated some choices from the decision.
I then remember that the advertised length on the ropes are often wild guesstimates, so the thought of buying one rope from one manufacture and another from even the same but not technically a ‘pair’ would mean that the chances would be that the ropes would as a result be wildly different lengths. This could be a safety issue as it becomes easier to abseil off the end of one rope. So I then decided that I needed to buy a pair of ropes.
I returned eventually to the cheapest cir they had, and walked out happy if not a little bewildered after an hour. After all I just wanted to buy a climbing rope!
Online Manual of Rock Climbing Skills and Techniques