Mountaineering equipment - Dynamic mountaineering ropes - Safety requirements and test methods

This European Standard specifies safety requirements and test methods for dynamic ropes (single, half and twin ropes) in kernmantel construction for use in mountaineering including climbing.

Bergsteigerausrüstung - Dynamische Bergseile - Sicherheitstechnische Anforderungen und Prüfverfahren

Diese Europäische Norm legt sicherheitstechnische Anforderungen und Prüfverfahren für dynamische Bergseile (Einfach-, Halb- und Zwillingsseile) in Kernmantelkonstruktion fest, die beim Bergsteigen einschließlich Klettern verwendet werden.

Équipement d'alpinisme et d'escalade - Cordes dynamiques - Exigences de sécurité et méthodes d'essai

La présente Norme européenne spécifie les exigences de sécurité ainsi que les méthodes d’essai applicables aux cordes dynamiques (cordes à simple, cordes à double et cordes jumelées) tressées avec âme et gaine pour une utilisation en alpinisme et en escalade.

Gorniška oprema - Dinamično obremenjene gorniške vrvi - Varnostne zahteve in preskusne metode

General Information

Status
Published
Publication Date
12-Dec-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Nov-2021
Due Date
23-Jan-2022
Completion Date
13-Dec-2021

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SLOVENSKI STANDARD
SIST EN 892:2012+A2:2022
01-januar-2022
Nadomešča:
SIST EN 892:2012+A1:2016
Gorniška oprema - Dinamično obremenjene gorniške vrvi - Varnostne zahteve in
preskusne metode

Mountaineering equipment - Dynamic mountaineering ropes - Safety requirements and

test methods

Bergsteigerausrüstung - Dynamische Bergseile - Sicherheitstechnische Anforderungen

und Prüfverfahren

Équipement d'alpinisme et d'escalade - Cordes dynamiques - Exigences de sécurité et

méthodes d'essai
Ta slovenski standard je istoveten z: EN 892:2012+A2:2021
ICS:
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
SIST EN 892:2012+A2:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 892:2012+A2:2022
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SIST EN 892:2012+A2:2022
EN 892:2012+A2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 97.220.40 Supersedes EN 892:2012+A1:2016
English Version
Mountaineering equipment - Dynamic mountaineering
ropes - Safety requirements and test methods

Équipement d'alpinisme et d'escalade - Cordes Bergsteigerausrüstung - Dynamische Bergseile -

dynamiques - Exigences de sécurité et méthodes Sicherheitstechnische Anforderungen und

d'essai Prüfverfahren

This European Standard was approved by CEN on 9 June 2016 and includes Amendment 2 approved by CEN on 3 October 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 892:2012+A2:2021 E

worldwide for CEN national Members.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Safety requirements ....................................................................................................................................... 7

5 Test methods .................................................................................................................................................... 9

6 Marking ............................................................................................................................................................ 24

7 Information to be supplied by the manufacturer ............................................................................. 25

Annex A (informative) Standards on mountaineering equipment............................................................ 26

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation (EU) 2016/425 aimed to be covered ............................................. 27

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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
European foreword

This document (EN 892:2012+A2:2021) has been prepared by Technical Committee CEN/TC 136

“Sports, playground and other recreational facilities and equipment”, the secretariat of which is held by

DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by May 2022, and conflicting national standards shall be

withdrawn at the latest by May 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document includes Amendment 1 approved by CEN on 9 June 2016 and Amendment 2 approved

by CEN on 3 October 2021.
This document supersedes !EN 892:2012+A1:2016".

The start and finish of text introduced or altered by amendment is indicated in the text by tags !"

and #$.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral

part of this document.
The main changes compared to EN 892:2004 are:
a) editorial changes;
b) conditioning climate in 5.2 was changed;

c) dimension of the remaining tape for preparation of the sheath slippage test in 5.4.2 was changed;

d) allowed slippage of the rope in the drop test in 5.6.3.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Introduction

The text is based on UIAA-Standard B (International Mountaineering and Climbing federation), which

has been prepared with international participation.

This standard is one of a package of standards for mountaineering equipment, see Annex A.

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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
1 Scope

This European Standard specifies safety requirements and test methods for dynamic ropes (single, half

and twin ropes) in kernmantel construction for use in mountaineering including climbing.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F,

G, H, K, N, T) (ISO 6508-1)

ISO 6487, Road vehicles — Measurement techniques in impact tests — Instrumentation

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
dynamic mountaineering rope

rope, which is capable, when used as a component in the safety chain, of arresting the free fall of a

person engaged in mountaineering or climbing with a limited peak force
3.2
single rope

dynamic mountaineering rope, capable of being used singly, as a link in the safety chain, to arrest a

leader's fall
3.3
half rope

dynamic mountaineering rope, which is capable, when used in pairs, as a link in the safety chain to

arrest the leader's fall
Note 1 to entry: See Figure 1.
3.4
twin rope

dynamic mountaineering rope, which is capable, when used in pairs and parallel, as a link in the safety

chain to arrest a leader's fall
Note 1 to entry: See Figure 2.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Figure 1 — Examples of use on half ropes
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Figure 2 — Use of twin ropes
3.5
kernmantel rope
rope composed of a core and a sheath
3.6
safety chain

connection of linked elements which protects the climber or mountaineer against falls from a height

Note 1 to entry: The safety chain includes ropes connected to the anchors by connectors and to the climbers by

harnesses.
4 Safety requirements
4.1 Construction

Dynamic ropes in accordance with this European Standard shall be made in a kernmantel construction.

Diameter and mass per unit length are relevant characteristics. See test method in 5.3.

If the properties of the rope change along its length, for example: diameter, strength, markings, samples

from each section shall be submitted for testing. The information to be supplied shall all correspond to

the lowest performance section of the rope.
4.2 Sheath slippage

When tested in accordance with 5.4, the sheath slippage in a longitudinal direction relative to the core

(in positive or negative direction) shall not exceed 1 % (20 mm) (see Figure 3).
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Key
1 sheath
2 core
a positive sheath slippage ≤ 20 mm
b negative sheath slippage ≤ 20 mm
Figure 3 — Sheath slippage
4.3 Static elongation
When tested in accordance with 5.5, the static elongation shall not exceed:
— 10 % in single ropes (single strand of rope);
— 12 % in half ropes (single strand of rope);
— 10 % in twin ropes (double strand of rope).
4.4 Dynamic Elongation

When tested in accordance with 5.6, the dynamic elongation shall not exceed 40 % during the first drop

for each test sample.
4.5 Peak force during fall arrest, number of drops
4.5.1 Peak force in the rope

When tested in accordance with 5.6, the peak force in the rope, during the first drop, for each test

sample, shall not exceed:
— 12 kN in single ropes (single strand of rope);
— 8 kN in half ropes (single strand of rope);
— 12 kN in twin ropes (double strand of rope).
4.5.2 Number of drops

When tested in accordance with 5.6, each rope sample shall withstand at least 5, for twin ropes at least

12, consecutive drop tests without breaking.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
5 Test methods
5.1 Test samples
A test sample with a length of:
— 40 m for single and half ropes,
— 80 m or 2 × 40 m for twin rope;
shall be available for the tests.
Carry out the tests in accordance with 5.3 on an unused test sample.

Carry out the tests in accordance with 5.4 on two unused test samples with a length of (2 250 ± 10) mm.

Carry out the test in accordance with 5.5 on two unused test samples with a length of at least 1 500 mm.

Carry out the tests in accordance with 5.6 on three unused test samples with a minimum length of 5 m

for single and half ropes, and 10 m for twin ropes, cut out of the available test sample.

5.2 Conditioning and test conditions

Dry the test samples for at least 24 h in an atmosphere of (50 ± 5) °C and less than 20 % relative

humidity. Then condition these test samples in an atmosphere of (23 ± 2) °C and (50 ± 2) % relative

humidity for at least 72 h. Then start testing these samples at a temperature of (23 ± 5) °C within 10

min.
5.3 Construction, diameter, and mass per unit length
5.3.1 Procedure
Clamp the test sample at one end.
Load the test sample without shock with a mass of:
— (10 ± 0,1) kg for single ropes,
— (6 ± 0,1) kg for half ropes,
— (5 ± 0,1) kg for twin ropes
at a distance of at least 1 200 mm from the clamp.

After applying the load for 60 s mark within the next 10 s a reference length of (1 000 ± 1) mm on the

test sample. The distance of the marking from the clamp or attachment for the test sample shall be at

least 50 mm.

Within a further 3 min measure the diameter in two directions around the diameter starting at points

90° apart at each of three levels approximately 100 mm apart. If the rope cross section is not circular,

the maximum and minimum diameter are to be determined in each section. The length of the contact

areas of the measuring instrument shall be (50 ± 1) mm. The rope cross-sectional area shall not be

subject to any compression during the measurement.

Then cut out the marked portion of the test sample and determine the mass to the nearest 0,1 g.

The mass can be introduced by a corresponding force.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Check that the construction of the rope is a kernmantel construction.
5.3.2 Expression of results

Express the diameter as the arithmetic mean of the six measurements to the nearest 0,1 mm.

Express the mass per unit length in ktex or g/m to the nearest 1 g.
5.4 Sheath slippage
5.4.1 Principle

The rope is drawn through the apparatus illustrated in Figure 4, where the movement is restricted by

radial forces. The resulting frictional force on the sheath causes slippage of the sheath relative to the

core. The extent of this slippage is measured.
Dimensions in millimetres
Key
1 moving plates
2 spacers
3 fixed plates
Figure 4 — Apparatus for testing the sheath slippage
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
5.4.2 Preparation of the test samples

Fuse one end of the sheath and core of each test sample together. Before cutting the other end of each

test sample to size, apply a short length of adhesive tape around the rope, where it is to be cut, at right

angles to the axis of the rope. The adhesive tape shall be at least 12 mm wide before cutting, and the

angle of wrap around the rope, Θ, shall be 150° ≤ Θ ≤ 180°. After affixing the adhesive tape, cut the

sample to a length of (2 250 ± 10) mm with a sharp knife, within the width of the tape, at right angles to

the axis of the rope (see Figure 5) such that the adhesive tape remaining on the test sample has a width

of (10 ± 5) mm. The characteristics of the adhesive tape and the method of application should be such

as to reduce the extent to which the cut end of the sheath unravels during the test, whilst not interfering

with the slippage taking place between the core and the sheath of the rope sample.

Dimensions in millimetres
Key
1 adhesive tape
Figure 5 — Sheath slippage test - Cutting the test sample to length
5.4.3 Apparatus

The apparatus shall consist of a frame made out of four steel plates each 10 mm thick, kept equal

distances apart by three spacers. These spacers shall have rectangular slots in which three inserted

steel plates are able to slide in a radial direction. The spacers shall be arranged in such a way as to allow

each of the three inserted plates to slide at an angle of 120° (see Figure 5).

Each of the seven plates shall have an opening with a diameter of 12 mm; their internal surfaces shall be

semitoroidal and have a radius of 5 mm. The polished surfaces of the semi-torus shall show:

— an arithmetical mean deviation of the profile of R = 0,4 µm and
— a surface roughness of R = 4 µm (see Figure 6).
max
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Dimensions in millimetres
Figure 6 — Section through one of the plates

The moving plates shall have a locked position in which the openings in the fixed plates and the

openings in the moving plates all lie in line along a central axis. When not in their locked position each

of the moving plates shall apply a radial force of (50 ± 0,5) N to the test sample in the direction in which

the plate moves. The test apparatus shall be rigidly mounted with its axis horizontal. Means shall be

provided to support, on a smooth surface, the test sample in a horizontal position in line with the axis of

the test apparatus, in both directions of travel.
5.4.4 Procedure

5.4.4.1 At the start of the test the moving plates shall be in their locked position.

5.4.4.2 Introduce the fused end of the test sample into the apparatus and pull to a length of

(200 ± 10) mm through the test apparatus (see Figure 7). Ensure that the remainder of the test sample

is not subjected to any load and lies in a horizontal position in a straight line.

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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Dimensions in millimetres
Key
1 sliding plates
Figure 7 — Layout of the test sample before and after sheath slippage test

5.4.4.3 Release the moving plates from their locked position and apply a force of (50 ± 0,5) N to the

test sample via each of the three moving plates and pull the test sample through the apparatus at a rate

+30
of (0,5 ± 0,2) m/s for a distance of (1 930 ) mm.

5.4.4.4 Remove the loads from the moving plates and return them to their locked position. Carefully

get hold of the short end of the test sample and slowly and gently pull it back through the test apparatus

to its initial position.

5.4.4.5 Repeat the procedure described in 5.4.4.3 and 5.4.4.4 three times. Then carry out the

procedure described in 5.4.4.3 once more. Whilst the test sample is still in the test apparatus, and with

the loads still applied to the moving plates, measure the relative slippage of the sheath along the core at

the open end of the test sample (see Figure 3).
5.4.5 Expression of results
Calculate the sheath slippage in percentage of the sample length (2 000 mm).
Express the value for each test sample to the nearest 0,1 %.
5.5 Determination of static elongation
5.5.1 Procedure
Carry out the test on a:
— single strand of rope for single ropes;
— single strand of rope for half ropes;
— double strand of rope for twin ropes.
+100

Clamp the test samples such that the free length between the clamps is (1 500 ) mm.

− 0
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)

Load the test sample without shock within (10 ) s with a mass of (80 ± 0,1) kg and maintain this load

for (180 ± 15) s.

Remove the load from the test sample and allow it to remain at rest for (10 ± 0,5) min.

Load the test sample without shock within (10 ) s with a mass of (5 ± 0,1) kg.

After applying the load for 60 s, mark within the next 10 s a reference length of (1 000 ± 1) mm.

Increase the load to (80 ± 0,1) kg without shock , within (10 ) s and maintain this load for (60 ± 5) s.

Measure the new distance l between the markings on the stressed test sample within the next 5 s.

5.5.2 Expression of results

Express the elongation as a percentage of the unloaded length: that is (l – 1 000)/10. Express the

results to the nearest 0,1 % for each test sample.

5.6 Drop test for determination of peak force, dynamic elongation and number of drops

5.6.1 Test conditions

Carry out the first drop test within 10 min of the respective test sample's removal from the conditioning

atmosphere (see 5.2).
5.6.2 Drop test apparatus
5.6.2.1 General

The drop test apparatus shall be set up in accordance with Figures 8, 10, 11, 12 and 13, and shall consist

essentially of a bollard and clamp, orifice plate, falling mass and guidance rails, means for measuring the

peak force in the rope, and means for measuring the peak extension of the rope. In addition, there shall

be a means for timing the descent of the mass to check that the guidance system is not interfering with

the free fall of the mass. The apparatus shall be sufficiently precise and rigid as to achieve the required

accuracy and reproducibility of the results.
5.6.2.2 Bollard and clamp

The bollard shall consist of a steel bar with a diameter of (30 ± 0,1) mm and a surface roughness as

follows:
— arithmetic mean deviation of the profile of R ≤ 0,8 µm;
— surface roughness R ≤ 6,3 µm.
max

The bar shall be fixed rigidly with its axis horizontal and without the possibility of rotation. To maintain

rigidity, the bar shall be as short as reasonably practicable whilst allowing two twin ropes or one single

rope each to be wound around its circumference three times. There shall be two clamps fixed rigidly in

relation to the bollard in accordance with the dimensions in Figures 10 and 11, and capable of fixing the

free end(s) of the rope(s).
5.6.2.3 Orifice plate

The orifice plate shall be manufactured from steel with a surface hardness of at least 52 HRC according

to EN ISO 6508-1. There shall be a cylindrical hole machined through the orifice plate at right angles to

its surface. The inside edge of the orifice shall be semi-toroidal in shape, with dimensions in accordance

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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)

with Figure 8. The orifice plate shall be mounted vertically in the apparatus, and fixed rigidly in relation

to the bollard in accordance with the dimensions in Figures 10 and 11.

There shall not be any structure below the orifice plate which might come into contact with the rope(s)

during a drop. When fixed in position in the apparatus, the lower edge of the orifice plate shall be

horizontal with a radius of at least 5 mm, and a dimension relative to the orifice as shown in Figure 8.

The semi-toroidal surface of the orifice shall have a roughness as follows:
— arithmetic mean deviation of the profile of R ≤ 0,2 µm;
— surface roughness R ≤ 2 µm.
max

The surface of the orifice plate below the orifice (see Figure 8) shall have a roughness as follows:

— arithmetic mean deviation of the profile of R ≤ 0,4 µm; surface roughness R ≤ 4 µm.

a max
Dimensions in millimetres
Figure 8 — Orifice plate
5.6.2.4 Falling mass and guidance rails

The falling mass shall be made of metal, and its fall shall be guided by two vertical rigid guidance rails.

Apart from items of negligible mass, the system of falling mass and guidance rails shall have a common

plane of symmetry midway between the guidance rails. The surface of the orifice plate shall be at right

angles to this plane of symmetry, and the centre line of the orifice shall lie within ± 2 mm of the plane of

symmetry. The falling mass and guidance system shall be positioned such that the horizontal distance

between the centre-line of the orifice plate and the centre-point of the means for rope attachment to the

falling mass is (80 ± 10) mm throughout the drop (see Figure 9).
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EN 892:2012+A2:2021 (E)

The dimensions of the falling mass, and of the guidance rails are not defined, but there are constraints

on some dimensions, on the design, and on the shape of the falling mass, as follows:

a) The falling mass shall be designed to fall freely with minimum contact with the guidance rails until

the test sample comes under tension, when some contact with the guidance rails will occur. To keep

the friction low between the falling mass and the guidance rails, the falling mass may be fitted with

roller or ball bearings or plane bearings with low friction surfaces. In all cases there shall be free

play between the falling mass and the guidance rails amounting to a maximum of 8 mm both in the

plane of the guidance rails and at right angles to this. The minimum vertical distance between

points on the falling mass which can come into contact with the guidance rails shall be defined as a

distance B. The design of the falling mass shall be such that
B ≥ 1,10 C,

where C is the minimum distance between points of contact with the guidance rails (see Figure 12).

b) The falling mass shall be fitted with a means for attachment of the rope, which can take several

forms, a U-bolt or a comparable construction which has a contact radius of (15 ) mm and a

thickness of (15 ± 0,1) mm, rigidly attached to the falling mass. The inner edge and the upper edge

of the attachment shall have a semicircular profile of radius (7,5 ± 0,05) mm.

An essential requirement is that the metal cross-section above the highest part of the attachment

shall be circular of diameter (15 ± 0,1) mm. Examples of forms for the means for attachment of the

rope are shown in Figure 13.

The effective point of application of the force from the rope onto the falling mass (see point X in

Figure 13) shall lie within 1 mm of the intersection of the following three planes:

1) a horizontal plane containing the highest points on the falling mass which can come into

contact with the guidance rails;
2) the plane of symmetry of the falling mass;

3) a plane at right angles to the two previous planes, which lies equidistant between the points to

the front of the falling mass which can come into contact with the guidance rails.

When the falling mass is hung from the means for attachment of the rope, and allowed to hang

freely, the falling mass shall hang within 0,5° of its normal orientation measured in any vertical

plane.

The distance between the effective point of application of the force from the rope onto the falling

mass (see point X in Figure 13) and the centre of gravity of the falling mass (A) shall be at least two

thirds of the vertical distance between the highest point and the lowest point which can come into

contact with the guidance rails (B) (see Figure 12). That is:
A ≥ 2 B/3

c) The falling mass, including the means for rope attachment, guidance bearings, and any other fixed

attachments, shall weigh:
1) (80 ± 0,1) kg for single ropes;
2) (55 ± 0,1) kg for half ropes;
3) (80 ± 0,1) kg for twin ropes.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Dimensions in millimetres
Key
X top view of the fixation
Figure 9 — Layout of apparatus for single strand test (half ropes, single ropes)
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Figure 10 — Illustration of the figure-of-eight knot
Figure 11 — Layout of apparatus for double strand test (twin ropes)
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
All other dimensions see Figure 9.
Key
1 upper point of contact with guidance rails
2 lower point of contact with guidance rails
A ≥ 2 B/3
B ≥ 1,10 C
C minimum distance between points of contact with the guidance rails
Figure 12 — Dimensional constraints on the falling mass
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Dimensions in millimetres
Key
1 clamping surface
R + 5
= (15 ) mm
X effective point of application of the force

Figure 13 — Examples of forms for the means for attachment of the ropes to the falling mass

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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)
Key
 sensitivity coefficient
20 lg
 
calibration factor
 
X frequency, in Hz
Figure 14 — CFC30 frequency response limits (according to ISO 6487)

Table 1 — CFC and logarithmic scale for the frequency response limits (according to ISO 6487)

Logarithmic scale
a ± 0,5 dB
b + 0,5; − 1 dB
F F F c + 0,5; − 4 dB
L H N
CFC
Hz Hz Hz
30 ≤ 0,1 30 50 d − 9 dB/octave
e −24 dB/octave
f ∞
g − 30 dB
5.6.2.5 Means for measuring the peak force in the rope

The measurements obtained have to equal the force which the rope(s) applies to the falling mass.

If the device is interposed between the falling mass and the means for attachment of the rope, it shall be

sufficiently rigid that the requirements of 5.6.2.4.b) are met.
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SIST EN 892:2012+A2:2022
EN 892:2012+A2:2021 (E)

The apparatus for measuring and recording the force in the rope shall correspond with ISO 6487,

channel frequency class (CFC) 30 (see Figure 14 and Table 1). The sampling frequency shall be at least

1 kHz.
The force transducer, in i
...

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