How to
decide when to retire a rope
Deciding when to retire
a rope is always going to be a difficult business and the BMC receives
literally hundreds of calls each year asking for advice on this subject.
Ideally we could say that after a given time and,or, pattern of use that a rope
should be retired. Unfortunately there are too many variables for such a
simplistic answer to be honestly given. Responsibility lies with the rope owner
to make a judgement, based on knowledge of how the rope has been used and of
the factors that will degrade a rope.
To further confuse the
situation manufacturers are now required to give advice on when to retire ropes
with their 'product user information' supplied with each rope. This puts them
in a difficult position and understandably they will tend to play safe and give
conservative figures for lifetime. This is usually three to five years,
regardless of pattern of use. Such figures are not particularly helpful when
deciding when to retire a rope as an unlucky rockfall or severe abrasion will
ruin a rope on its first outing whilst another rope may have sustained no
damage or falls over five years of light use.
Knowledge of a rope's
history is vital when making decisions about when to retire or downgrade it.
Every traumatic event suffered by the rope causes some damage to it and severe
falls can cause serious damage. Consider downgrading any rope that has
sustained a serious fall (fall factor greater than 1). Apart from knowing the
number and severity of falls a rope has sustained, you should have a broader
idea of the type and condition of usage it has undergone. This is particularly
important when considering what invisible damage might have occurred. You can
check a rope for localised internal damage by running it slowly through your
fingers and feeling for any irregularities or unevenness. The existence of
either could indicate serious damage. However the absence of either does not
indicate the rope is undamaged. In particular damage from internal grit
abrasion is unlikely to show up in this way.
The general feel of the
rope can also give indication as to its condition. For instance a rope that was
once soft and supple that has become stiff and liable to kinking and resists
attempts to rectify it (q.v.) should perhaps be downgraded as this indicates
permanent damage. If such a rope continues to be used it will reach a point
where the sheath integrity starts to be affected, and at this point it is
definitely time to retire the rope.
As a very general figure,
with regular (every weekend and midweek) usage, you would not expect to get
much more than three years out of a rope before downgrading it. Heavy use (most
days) will greatly reduce this lifetime and it is quite possible to wear out a
rope in less than six months. If used less and well cared for a rope will have
a longer lifetime.
Observation suggests that
if a rope is broken in gently by careful use, alternating the lead end,
avoiding hard loading etc. it will have a much longer life than if it is used
hard from new. The reasons for this are not fully understood.
A rope need not be
considered unusable at the end of its life as a lead rope. A rope that you are
suspicious of can be downgraded. It will still be useful for some time as a top
rope, abseil rope or glacier rope.
The
decision on when to retire your rope is your own. The best you can do is base a
decision on knowledge of how a rope has been used, and how it feels and looks.
Keeping a log of use and regularly checking for damage is good practice and if
in doubt ask the opinion of other experienced climbers.
When to
retire your own rope is a personal decision. There is plenty of evidence to
suggest that a rope with no detectable damage will not break in normal use
unless cut over a sharp rock edge. It is likely that well before a rope becomes
unsafe you will wish to downgrade it, because its handling is bad or it has got
too fat or perhaps you have just lost confidence in it. In short when you start
thinking it may be time to get a new rope then it probably is.
A more
rigorous approach should be applied that demonstrates that good practice is
being followed. With a central equipment pool each individual rope should be
uniquely identifiable and its use monitored and recorded in some form of log.
In any environment where a
legal duty of care exists (which could be voluntary as well as a commercial
situation), a demonstrably competent individual should be responsible for
monitoring rope use. This person could be a recognised ‘Technical Expert’ such
as a suitably qualified Mountain Instructor or Guide, or an experienced climber
with comparable expertise. This person need not be responsible for the routine
checking of ropes, but should oversee and approve of the systems in place for
equipment monitoring
In other situations where a
rope pool is maintained (such as a climbing clubs), a duty of care also exists
between the organisations and their its members. In these situations the
organisation should ensure that the individuals responsible for the ropes
familiarise themselves with good practice, as described below, and be aware of
rope degradation mechanisms.
In either case detailed
logs of use should be maintained, all ropes should be individually identifiable
and checks should be made after every period of use (daily, weekly or monthly
depending on the pattern of use) for external or internal damage and the log sheet
annotated.
Rope: |
Date |
Type of use |
Notes |
By whom (for pooled ropes) |
Checked: OK? |
date |
initial. |
9mm lead no.12 |
12/10/98 |
leading |
used once on single pitch route |
andrew g. |
yes |
13/10/98 |
A.G.D. |
If there is any doubt as to a rope’s integrity it should be retired immediately. Ropes at centres tend to get heavy use and are likely to be retired well before the lifetime suggested by the manufacturer. As an example the ropes at Plas y Brenin, the National Mountain Centre, are only used as lead ropes for the first year of their life. If they suffer any detectable damage or a big fall during this year they are withdrawn from use or downgraded to a single pitch top rope. In any case after one year of use they are then downgraded to top rope use and may eventually end up as rigging ropes