MAYBE IT`S TIME SOMEONE GAVE YOU A HAND PREDICTING

MAYBE IT'S TIME SOMEONE GAVE YOU
A HAND PREDICTING HOIST ROPE LIFE AND
PERFORMING ROPE LOAD EQUALIZATIONS.
www.brugglifting.com
ACTUALLY, WITH BRUGG RLP AND
BRUGG RLE WE'RE OFFERING
MUCH MORE THAN JUST A HAND.
Today The Answer To
"How Long Can I Expect
A Hoist Rope To Last?"
,
Can Be Calculated Online.
such as installation and maintenance technique
(especially in addressing issues such as uneven
tensioning and the degree and frequency of rope
lubrication) can be difficult (if not impossible) to
empirically evaluate.
In addition, certain key variables such as
sheave misalignment and the constantly changing
nature of an installation’s actual and developing
environment (the presence of moisture and dust)
must be considered as well. These factors rarely
affect a system singly but instead impact one
another in a multiplicative manner. So if RLP had
been designed to gauge
every variable factor
completely it would have
become a program that
would be far too unwieldy for
most professionals to use.
Despite these practical
concerns Brugg RLP
comes as close as possible
to providing professionals
with a reliable gauge that
replaces anecdotal evidence and myth with
solid logic, research and mathematics, making
your job far easier.
Brugg RLP: Background
Brugg Lifting has developed RLP(Rope Life
Predictor) as a true convenience and valuable tool
for elevator industry professionals. Brugg RLP
removes both the guesswork and confusion of
selecting the hoist rope that best matches the
reality of a particular installation.
Based upon the life work of Professor Dr. Klaus
Feyrer, (Professor of Engineering at the University
of Stuttgart), RLP is a multi-step, auto-calculating
online application that converts specific system
data into results you can use to make on-target
decisions about rope life expectancy.
RLP calculates with 95% confidence
that a maximum 10% of the ropes will reach
discard criteria at the calculated number of
bending cycles. No other method available today
allows the professional to calculate this figure with
such a high degree of accuracy, without the need
to master complex formulas, and all at the
subscription price of only $179 or € 138 per year
(RLP may be used free for an introductory
30-day period).
Note that we said RLP is 95% certain. This is
because despite our efforts at taking every factor
into account in RLP’s calculations, certain variables
are hard, if not impossible, to fully quantify. Factors
Dr. Feyrer’s endurance calculations and work
have been available for over a decade, (RLP is
largely based upon Feyrer’s work: Wire Ropes:
Tension, Endurance, Reliability by Springer
Press) but much of the industry has been relatively
unaware of their benefits.
This may be due to a lack of publicity and the
fact that until very recently his calculations were
available only in Feyrer’s native German text.
In addition, many of Feyrer’s calculations
required the user to input criteria only in metric
units. This proved to be somewhat of a hindrance to
American professionals who are more comfortable
using traditional imperial measurements. Indeed,
some professionals viewed this metric component in
Feyrer's work, and the need to recalibrate their data
in order to use the formulas, as a hindrance to
productivity and a layer of complexity that was
best avoided. For your convenience RLP offers
Feyrer’s calculation to professionals using
either metric or imperial measurement units.
Another feature of Dr. Feyrer’s original work
demanded the user have an impressive knowledge
and facility in higher mathematics. Consequently
many of his calculations became seen as best left
Entering through a secure portal, a series of
screens takes you through the process of
calculating rope life. In addition to a Cost/Benefit
Analysis feature that shows how rope selections
and maintenance impact short and long-term
budgetary costs, Brugg RLP offers users the
ability to review and examine various hoist rope
selection scenarios.
to engineers to explore. RLP removes this problem
by condensing, editing and combining his formulas
into an easy-to-use approach uniquely tailored to the
needs of most industry professionals. In effect this
turns RLP into an advanced spreadsheet that takes
a set of complex equations and integrates them.
By using easy drop-down menus RLP converts your
specific system data into results you can use.
What RLP Can Do.
BRUGG RLP guides the user through the entire
process of gathering the data needed for rope life
calculations. With RLP you can output review
test scenarios on-screen and then output results in
either PDF or Excel formats. This allows you to share
details with others, or should you have questions,
forward the results to Brugg Lifting for review.
In addition to helping you determine the best
performing rope necessary for an installation,
Brugg RLP also includes a Cost/Benefit Analysis
feature that contrasts how certain ropes, in
combination with various factors, can impact
budget outlays over time. RLP accounts for key
variable factors and a variety of multiplicative
effects such as:
• rope (and core) designs
• sheave diameters
• sheave groove profiles
• reverse bends
• elevator car speed
• hoist rope velocity
• hoist rope tensioning and load effects
• and/or the effective degree of
maintenance and lubrication
Create Either In-Depth
Or Simple Analyses.
Our RLP application was created for those
who wish to take a deeper look at how hoist ropes
perform under a range of system conditions. Brugg
RLP provides an efficient way to compare rope and
sheave variations, and details in a graphic manner
how something as simple as a small change in
maintenance routine or an upgrade to a better
performing rope can make a real difference in
performance. It also documents how standard
sisal rope designs fail to deliver acceptable results
in many installations. In addition, RLP can provide
useful data to those bidding for maintenance
contracts and will prove vital to those creating
new, more advanced elevator systems.
Evaluating The True Cost
Of Rope Improvements.
Few would argue that maintenance costs are
an important consideration in deciding which rope
one should buy. Obviously any item that performs
poorly is no bargain. Unfortunately we still find some
today who fail to comprehend just how seriously
maintenance costs can impact business profitability.
Not considering long-term issues can mean
financial disaster for those trying to maintain
existing installation maintenance contracts or for
anyone evaluating the profitability in bidding for new
maintenance contracts. With RLP you can see how
making the right rope choice is vital in obtaining
maximum rope longevity and system performance.
With RLP you can see how short and long-term
labor costs in installation, maintenance and
re-roping, can impact overall budgetary costs.
If you have ever considered moving up to higher
performance ropes, but were curious to see how
their use could make an actual difference in your
bottom line, RLP can graphically illustrate their
advantage. In fact, by using RLP and contrasting
various rope scenarios, you'll quickly see that using
high performance ropes (either Parallel design or
our Point Contact X-series ropes) are actually the
more economical choice.
And this can only be understood fully by looking
at the overall view of an installation that RLP affords.
Don't spend your time trying to gauge hoist rope
choice solely based upon the price of the available
commodity rope. That's only one part of the total
equation you need to consider.
FOR THE FASTEST WAY TO TENSION HOIST
ROPES JUST SHIFT OVER TO BRUGG RLE.
Industry professionals have always appreciated
the impact proper maintenance technique can have
on overall installation performance and the longevity
of ropes and traction sheaves. They also have to
deal with conflicting economic necessities to control
and reduce maintenance costs. This can often
mean that critical, time intensive procedures —
such as rope load equalizations — may be dropped
from a maintenance routine entirely or become
infrequently performed.
Why Equalizations Matter.
This trend towards de-emphasizing the
performance of rope load equalizations is indeed
unfortunate, as calculations using Brugg RLP show
Brugg RLE (Rope Load Equalizer) uses basic
hydraulic principles to turn tensioning into a task
that one man can handle in about thirty minutes.
that poorly performed rope load equalizations can
negatively impact rope life by up to 50% or more.
We have to wonder whether this pressure to lower
maintenance costs, and sometimes shortcut key
procedures, has helped lead to an increase in the
frequency of equipment breakdowns and the need
for more frequent replacement of hoist ropes.
We Want To Help.
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Poorly tensioned ropes actually travel different overall
distances. This leads to poor installation performance,
severely shortened hoist rope life and can result in damage
to the sheave and surrounding components. A heavy loaded
rope runs deeper in a groove (smaller diameter) and a
lightly loaded rope runs higher (larger diameter).
Brugg Lifting is doing its part to counter this
trend by offering numerous educational resources
and providing tools to help professionals in their
efforts to install and maintain hoist ropes. While
many have found these efforts useful (and have
seen beneficial results as a consequence), a major
need in the industry still had to be addressed —
we had to find a way to make hoist rope load
equalizations faster, easier, more reliable, accurate,
and consequently, more likely to be performed.
RLE Standard Kit for Installations with shackle rods of 3/4 in./M20 or less.
A
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B
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J
C
G/H
E
A
2
A * Threaded Insert 3/4—10 : (6) 11283
A * Threaded Insert M20 : (6) 11284
B. Hydraulic Cylinder : (6) 11282
C. Short Stand : (6) 11704
D. Triple Hose : (2) 11710
E.** Pump Assembly : (1) 11733
F. Single Hose : (2) 11705
G. Adjustment Nut Collar 3/4-10 : (1) 11273
H. Adjustment Nut Collar M20 : (1) 11713
I.
Nut Collar Key : (1) 11269
J. Adjustment Nut Stand (1): 11265
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** Pump Assembly uses AW32 hydraulic oil.
It was with this goal in mind that in 2009 we
introduced Brugg RLE (Rope Load Equalizer) –
a tool and procedure primarily designed for 2:1
installations (as they are by far the most difficult
to do). Using a simple, reliable and sturdy hydraulic
system (based on custom hydraulic cylinders, a
common manifold and pump), RLE provides
professionals with much more than just another
tension measurement gauge.
Gauges, due to the very method they use to
measure rope tension, are inherently inaccurate and
are thus the wrong tool one should use to achieve
rope load equalization. Instead Brugg RLE is
the correct way to do the job accurately and quickly.
There Is No Faster
Way To Do The Job Right.
Brugg RLE is the industry's first and only
comprehensive solution that professionals can use
to perform true rope load equalizations. Any other
technique on the market today is basically a
variant of the old-fashioned "plucking" method,
(where the mechanic gauges tension and then
repetitively applies a wrench to the shackles in an
effort to adjust tensions) no matter how advanced
the measuring device used appears.
With RLE one person can efficiently
equalize an entire set of ropes in about 30 minutes.
This significantly reduces the cost of this important
maintenance activity as it frequently requires at
least four man-hours to perform equalizations.
Doing it the "manual way" means it is likely not
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* Choice of either A1 or A2 inserts as part of Standard Kit.
M16 and M12 Threaded Inserts are available upon request.
done well enough. Brugg has also observed that
with 2:1 systems it is practically and effectively
impossible to equalize ropes with any accuracy.
RLE is extremely versatile and offers a variety
of options to ensure a precise match between
rope socket thread and hitchplate arrangement.
Our tool is also made to address a wide range of
space limitations. Should you find that you have
specific requirements outside of RLE's available
system parameters we can tailor the device to
address your needs.
This method delivers such a wide range of
inaccuracy that no matter how skilled, or attentive
the mechanic, at best one could only achieve a
degree of true equalization— which could be argued
is not truly equalization at all.
Brugg RLE is the only tool available that
accomplishes the goal of equalizing hoist rope loads
both accurately and quickly. With this handy tool
system you can save big money in maintenance,
increase system performance, and reduce costly
wear and tear on ropes and sheaves.
RLE Has No Equal.
The Brugg RLE
Standard Kit contains
all components necessary
to handle installations
with shackle rod
diameters of 3/4 in. /
M20 or less. More than
an engineering feat,
RLE is the cost-effective
way to boost overall
maintenance efficiency
and productivity.
Quite simply, RLE has
no equal. As mentioned
previously, all hoist rope
tensioning tools available
today depend upon a
deflection-based system
to measure rope tensions.
Brugg Lifting • Rome,GA USA
+1.706.235.6315
www.brugglifting.com
Brugg Lifting • Birr CH
+41(0)56 464 42 42
www.brugglifting.com
Brugg Lifting •Dubai UAE
+97 14 887 6991
www.brugglifting.com
Brugg Lifting• P.R. China
+86 512 6299 0779
www.brugglifting.com
©
2014 Brugg Lifting
All materials are provided freely for the use of elevator industry
professionals. Editorial reprint of content should include,
“Used courtesy of Brugg Lifting.”
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