Stationary training equipment - Part 2: Strength training equipment, additional specific safety requirements and test methods (ISO 20957-2:2020)

This document specifies additional safety requirements for stationary strength training equipment.
This document is intended to be read in conjunction with the general safety requirements of ISO 20957‑1.
This document is applicable to stationary training equipment type strength training equipment with stacked weight resistance or other means of resistance, such as elastic cords, hydraulic, pneumatic, electrical, magnetic, springs and externally loaded weights (type 2) (hereinafter referred to as training equipment) with the classes H, S and I according to ISO 20957‑1.
NOTE Free-weight barbell racks are subject to the requirements of ISO 20957‑4 and ISO 20957‑1.

Stationäre Trainingsgeräte - Teil 2: Kraft-Trainingsgeräte, zusätzliche besondere sicherheitstechnische Anforderungen und Prüfverfahren (ISO 20957-2:2020)

Dieses Dokument legt weitere sicherheitstechnische Anforderungen für stationäre Kraft Trainingsgeräte fest.
Es ist vorgesehen dieses Dokument in Verbindung mit den allgemeinen sicherheitstechnischen Anforderungen nach ISO 20957 1, anzuwenden.
Dieses Dokument gilt für stationäre Trainingsgeräte vom Typ Kraft Trainingsgeräte (Typ 2) (im Folgenden Trainingsgeräte genannt) der Klassen H, S und I nach ISO 20957 1, bei denen der Widerstand durch Steckgewichte oder andere Widerstandssysteme, wie elastische Bänder, Hydraulik, Pneumatik, Elektronik, Magnetkraft, Federn und extern belastete Gewichte aufgebaut wird.
ANMERKUNG   Ablagen für Langhanteln mit freien Gewichten unterliegen den Anforderungen von ISO 20957 4 und ISO 20957 1.

Équipement d'entraînement fixe - Partie 2: Équipement d'entraînement de force, exigences spécifiques de sécurité et méthodes d'essai supplémentaires (ISO 20957-2:2020)

Le présent document spécifie des exigences de sécurité supplémentaires pour les équipements d'entraînement fixes de force.
Le présent document est destiné à être lu conjointement aux exigences de sécurité générales figurant dans l'ISO 20957‑1.
Le présent document s'applique aux équipements d'entraînement fixes de type équipements d'entraînement de force utilisant une résistance à l'aide de piles de poids ou d'autres moyens de résistance comme de la corde élastique, des systèmes hydrauliques, pneumatiques, électriques, magnétiques ou à ressorts et des poids chargés par l'extérieur (type 2) (équipements désignés ci-après par « équipements d'entraînement ») de classes H, S et I, conformément à l'ISO 20957‑1.
NOTE Les supports de poids et d'haltères libres sont soumis aux exigences de l'ISO 20957‑4 et de l'ISO 20957‑1.

Nepremična oprema za vadbo - 2. del: Oprema za vadbo moči, dodatne posebne varnostne zahteve in preskusne metode (ISO 20957-2:2020)

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
16-Jun-2021
Completion Date
16-Jun-2021

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SLOVENSKI STANDARD
SIST EN ISO 20957-2:2021
01-september-2021
Nadomešča:
SIST EN 957-2:2003
Nepremična oprema za vadbo - 2. del: Oprema za vadbo moči, dodatne posebne
varnostne zahteve in preskusne metode (ISO 20957-2:2020)

Stationary training equipment - Part 2: Strength training equipment, additional specific

safety requirements and test methods (ISO 20957-2:2020)

Stationäre Trainingsgeräte - Teil 2: Kraft-Trainingsgeräte, zusätzliche besondere

sicherheitstechnische Anforderungen und Prüfverfahren (ISO 20957-2:2020)
Équipement d'entraînement fixe - Partie 2: Équipement d'entraînement de force,

exigences spécifiques de sécurité et méthodes d'essai supplémentaires (ISO 20957-

2:2020)
Ta slovenski standard je istoveten z: EN ISO 20957-2:2021
ICS:
97.220.30 Oprema za dvoranske športe Indoor sports equipment
SIST EN ISO 20957-2:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 20957-2:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 20957-2:2021
EN ISO 20957-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 97.220.30 Supersedes EN 957-2:2003
English Version
Stationary training equipment - Part 2: Strength training
equipment, additional specific safety requirements and
test methods (ISO 20957-2:2020)

Équipement d'entraînement fixe - Partie 2: Stationäre Trainingsgeräte - Teil 2: Kraft-

Équipement d'entraînement de force, exigences Trainingsgeräte, zusätzliche besondere

spécifiques de sécurité et méthodes d'essai sicherheitstechnische Anforderungen und

supplémentaires (ISO 20957-2:2020) Prüfverfahren (ISO 20957-2:2020)
This European Standard was approved by CEN on 30 July 2020.

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 ISO 20957-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 20957-2:2021
EN ISO 20957-2:2021 (E)
Contents Page

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

---------------------- Page: 4 ----------------------
SIST EN ISO 20957-2:2021
EN ISO 20957-2:2021 (E)
European foreword

This document (EN ISO 20957-2:2021) has been prepared by Technical Committee ISO/TC 83 "Sports

and other recreational facilities and equipment" in collaboration with 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 December 2021, and conflicting national standards

shall be withdrawn at the latest by December 2021.

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 supersedes EN 957-2:2003.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice

The text of ISO 20957-2:2020 has been approved by CEN as EN ISO 20957-2:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 20957-2:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 20957-2:2021
INTERNATIONAL ISO
STANDARD 20957-2
Second edition
2020-08
Stationary training equipment —
Part 2:
Strength training equipment,
additional specific safety
requirements and test methods
Équipement d'entraînement fixe —
Partie 2: Équipement d'entraînement de force, exigences spécifiques
de sécurité et méthodes d'essai supplémentaires
Reference number
ISO 20957-2:2020(E)
ISO 2020
---------------------- Page: 7 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Classification ............................................................................................................................................................................................................ 5

5 Safety requirements ......................................................................................................................................................................................... 5

5.1 General ........................................................................................................................................................................................................... 5

5.2 Stability .......................................................................................................................................................................................................... 5

5.2.1 General...................................................................................................................................................................................... 5

5.2.2 Externally loaded equipment ................................................................................................................................ 5

5.2.3 User-defined motion equipment ........................................................................................................................ 6

5.3 Loading .......................................................................................................................................................................................................... 6

5.3.1 Selectorized equipment and alternative resistance training equipment ........................ 6

5.3.2 Externally loaded equipment ................................................................................................................................ 6

5.4 Endurance ................................................................................................................................................................................................... 7

5.4.1 General...................................................................................................................................................................................... 7

5.4.2 Additional requirements for externally loaded equipment ........................................................ 7

5.5 Access to squeeze and/or shear points ............................................................................................................................. 8

5.5.1 Stacked weights or alternative means of resistance ......................................................................... 8

5.5.2 Weight disc clearance for externally loaded weights ....................................................................13

5.6 Weight disc retention .....................................................................................................................................................................13

5.7 Entrapment .............................................................................................................................................................................................13

5.8 Pull-in points .........................................................................................................................................................................................13

5.9 Additional instructions for use ..............................................................................................................................................14

5.10 Additional marking ..........................................................................................................................................................................15

6 Test methods ..........................................................................................................................................................................................................15

6.1 General ........................................................................................................................................................................................................15

6.1.1 Dimensional check ......................................................................................................................................................15

6.1.2 Visual examination ......................................................................................................................................................15

6.1.3 Tactile examination.....................................................................................................................................................15

6.1.4 Performance test ...........................................................................................................................................................15

6.2 Stability testing ....................................................................................................................................................................................15

6.2.1 General...................................................................................................................................................................................15

6.2.2 Externally loaded equipment .............................................................................................................................15

6.2.3 User-defined motion equipment .....................................................................................................................16

6.3 Loading test ............................................................................................................................................................................................16

6.3.1 Weight posts intended for training ...............................................................................................................16

6.3.2 Weight posts intended for storage.................................................................................................................16

6.3.3 Extrinsic loading test ........................................................................................................................................... ......16

6.3.4 Catch mechanisms for guided equipment loading test ................................................................17

6.4 Endurance test .....................................................................................................................................................................................17

6.4.1 General...................................................................................................................................................................................17

6.4.2 Additional requirements for externally loaded equipment .....................................................17

7 Test report ................................................................................................................................................................................................................17

Bibliography .............................................................................................................................................................................................................................18

© ISO 2020 – All rights reserved iii
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SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 83, Sports and other recreational facilities

and equipment, Subcommittee, in collaboration with the European Committee for Standardization (CEN)

Technical Committee CEN/TC 136, Sports, playground and other recreational facilities and equipment, in

accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 20957-2:2005), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— the formulation has been aligned with ISO 20957-1;
— Clause 3 has been updated;
— Clause 5 has been specified and restructured;
— Clause 6 has been specified and restructured;

— additional requirements for externally loaded equipment have been added to Clauses 5 and 6.

A list of all parts in the ISO 20957 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 20957-2:2021
INTERNATIONAL STANDARD ISO 20957-2:2020(E)
Stationary training equipment —
Part 2:
Strength training equipment, additional specific safety
requirements and test methods
1 Scope

This document specifies additional safety requirements for stationary strength training equipment.

This document is intended to be read in conjunction with the general safety requirements of ISO 20957-1.

This document is applicable to stationary training equipment type strength training equipment with

stacked weight resistance or other means of resistance, such as elastic cords, hydraulic, pneumatic,

electrical, magnetic, springs and externally loaded weights (type 2) (hereinafter referred to as training

equipment) with the classes H, S and I according to ISO 20957-1.

NOTE Free-weight barbell racks are subject to the requirements of ISO 20957-4 and ISO 20957-1.

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.

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 20957-1, Stationary training equipment — Part 1: General safety requirements and test methods

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 20957-1 and the following 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 http:// www .electropedia .org/
3.1
selectorized equipment

strength training equipment where the resistance means is a load that is an integral part of the device

that can be varied by the user without adding or removing components to and from the equipment

Note 1 to entry: An example of equipment where this component is relevant is shown in Figure 1.

© ISO 2020 – All rights reserved 1
---------------------- Page: 11 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
Figure 1 — Example of selectorized guided type equipment
3.2
externally loaded equipment

strength training equipment where the main resistance means is a load that is not an integral part of the

device which can be varied by the user by adding or removing components to and from the equipment

Note 1 to entry: Components to be added or removed are, for example, weight discs or bands.

3.3
drop stop

permanent or adjustable constructive element creating a pre-set minimum stop position that provides

the user with clearance to avoid entrapment without any further action of the user

3.4
catch mechanism

rest or holder for a barbell or for a carriage on guided equipment (3.9), which needs to be engaged by the

user, from which the user can begin the exercise motion or end at the completion of the exercise

3.5
work arm

component of strength training equipment that allows the user to activate resistance means for a

specific exercise

Note 1 to entry: An example of equipment where this component is relevant is shown in Figure 2 a).

3.6
training resistance
force or torque exerted by the user to perform the exercise
3.7
weight post

structure protruding from the frame of externally loaded equipment (3.2) for the purpose of holding

weight either for a resistance means or for storage

Note 1 to entry: An example of equipment where this component is relevant is shown in Figure 2 b) and 2 c).

2 © ISO 2020 – All rights reserved
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SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
3.8
work arm actuated equipment

equipment where the external load is attached directly or indirectly to a movement mechanism that is

displaced intentionally by the user
Note 1 to entry: An example is shown in Figure 2 a).
3.9
guided equipment

equipment where the external load is placed on a weight post (3.7) affixed to a carriage that is moving

on a guided path

Note 1 to entry: Examples are shown in Figure 2 b) and 2 c). Commonly used names for this equipment are "Smith

press", "Smith Machine" and "multi-press".
Note 2 to entry:
© ISO 2020 – All rights reserved 3
---------------------- Page: 13 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
a) Chest press b) Multi press
c) Leg press
Key
1 catch mechanism 5 work arm
2 adjustable drop stop 6 carriage
3 guide 7 weight post
4 barbell

Figure 2 — Examples for different types of externally loaded guided strength training

equipment
3.10
stacked weights
stacked guided weights used as a selectable training load
4 © ISO 2020 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
3.11
user-defined motion equipment
equipment where the workout motion is solely defined by the user
Note 1 to entry: Example is shown in Figure 3.
Figure 3 — Example of user-defined motion equipment
4 Classification
The classification given in ISO 20957-1 shall apply.
5 Safety requirements
5.1 General

Depending on the design of the training equipment, the following requirements shall apply as

appropriate.
5.2 Stability
5.2.1 General

The equipment shall be stable in any direction and loading condition in training, folding and storage

positions.
Test in accordance with the stability test in ISO 20957-1.
5.2.2 Externally loaded equipment

The equipment shall be stable when loaded as specified by the manufacturer either symmetrically or

asymmetrically.
© ISO 2020 – All rights reserved 5
---------------------- Page: 15 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
Test in accordance with 6.2.2.
5.2.3 User-defined motion equipment

The equipment shall be stable with maximum load selected as provided by the equipment and with its

stacked weights at its highest point of the range of travel.
Test in accordance with 6.2.3.
5.3 Loading
5.3.1 Selectorized equipment and alternative resistance training equipment

For equipment classes H, S and I, the intrinsic loading and the extrinsic loading shall be in accordance

with ISO 20957-1.
5.3.2 Externally loaded equipment
5.3.2.1 General

In addition to ISO 20957-1 the loading requirements given in 5.3.2.2 to 5.3.2.5 shall apply.

5.3.2.2 Weight posts intended for training

For classes S and I, the training weight posts shall withstand a static load of 6 times the maximum load,

as specified by the manufacturer for the training weight post being evaluated.

For class H, the training weight posts shall withstand a static load of 4 times the maximum load, as

specified by the manufacturer for the training weight post being evaluated.
Test in accordance with 6.3.1.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.3.2.3 Weight posts intended for storage

For classes S and I, the storage weight posts shall withstand a single static load of 4 times the maximum

load, as specified by the manufacturer for the storage weight post being evaluated.

For class H, the storage weight posts shall withstand a single static load of 2,5 times the maximum load

as specified by the manufacturer for the storage weight post being evaluated.
Test in accordance with 6.3.2.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.3.2.4 Extrinsic loading

The equipment shall withstand an extrinsic load F as calculated in accordance with Formula (1).

test
F = S(W + 1,5F) (1)
test p a
where
6 © ISO 2020 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
F is the total reactionary load to be applied during the test, in newton;
test
S is the safety factor of 4 for classes S and I, and 2,5 for class H;

W is the user's body weight portion of the load applied to the part of the equipment being evalu-

ated, of either 100 kg or the maximum user mass as specified by the manufacturer, whichever

is greater, in newton;
1,5 is the dynamic coefficient;

F is the load applied to the part of the equipment being evaluated, derived from the maximum

specified load while performing exercise, in newton.
Test in accordance with 6.3.3.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.3.2.5 Catch mechanisms for guided equipment

For classes S and I, the catch mechanism shall withstand a single static load of 6 times the maximum

load as specified by the manufacturer.

For class H, the catch mechanism shall withstand a single static load of 4 times the maximum load as

specified by the manufacturer.
Test in accordance with 6.3.4.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.4 Endurance
5.4.1 General

The equipment shall withstand the endurance requirements in accordance with ISO 20957-1 with a

load of the maximum user's body mass as specified in the user's manual or 100 kg, whichever is greater,

and the maximum training load, considering the following:

If the user's body weight is a factor in the loading of the equipment during operation, then the applicable

portion of the maximum user's body mass, as specified in the user's manual, or 100 kg, whichever is

greater, shall be applied to the user support surface at the point of user contact.

Test in accordance with 6.4.1.

After the test, the equipment shall not be broken and shall still function as intended by the manufacturer.

5.4.2 Additional requirements for externally loaded equipment
5.4.2.1 General

In addition to ISO 20957-1 and 5.4.1, the requirements given in 5.4.2.2 to 5.4.2.4 shall be applied to work

arm actuated equipment and guided equipment.
5.4.2.2 Work arm actuated equipment
The equipment shall withstand
a) one impact for class H, and
© ISO 2020 – All rights reserved 7
---------------------- Page: 17 ----------------------
SIST EN ISO 20957-2:2021
ISO 20957-2:2020(E)
b) ten impacts for classes S and I

of the maximum training load as specified by the manufacturer where the user interfaces with the work

arm travels through a distance of (460 ± 5) mm. If this distance is not achievable, the maximum range

of motion shall be used.
Test in accordance with 6.4.2.1.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.4.2.3 Catch mechanisms of guided equipment
The catch mechanism shall withstand
a) one impact for class H, and
b) ten impacts for classes S and I, each time on the same catch mechanism

of the maximum training load as specified by the manufacturer. The carriage or barbell shall be dropped

(150 ) mm along the guided path. If this distance is not achievable, the maximum range of motion

shall be used.
Test in accordance with 6.4.2.2.

After the test, the training equipment shall not be broken and shall still function as intended by the

manufacturer.
5.4.2.4 Drop stop for guided equipment
The drop stop shall withstand
a) one impact for class H, and
b) ten impacts for classes S and I

of the maximum training load as specified by the manufacturer. The carriage or barbell shall be dropped

(460 ) mm along the guided path. If this distance is not achievable, the maximum range of motion

shall be used.
Test in accordance with 6.4.2.3.
After the test, the training equipment shall not be broken and shall
...

SLOVENSKI STANDARD
oSIST prEN ISO 20957-2:2019
01-marec-2019
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Stationary training equipment - Part 2: Strength training equipment, additional specific

safety requirements and test methods (ISO/DIS 20957-2:2019)

Stationäre Trainingsgeräte - Teil 2: Kraft-Trainingsgeräte, zusätzliche besondere

sicherheitstechnische Anforderungen und Prüfverfahren (ISO/DIS 20957-2:2019)
Équipement d'entraînement fixe - Partie 2: Équipement d'entraînement de force,

exigences spécifiques de sécurité et méthodes d'essai supplémentaires (ISO/DIS 20957-

2:2019)
Ta slovenski standard je istoveten z: prEN ISO 20957-2
ICS:
97.220.30 Oprema za dvoranske športe Indoor sports equipment
oSIST prEN ISO 20957-2:2019 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 20957-2:2019
---------------------- Page: 2 ----------------------
oSIST prEN ISO 20957-2:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20957-2
ISO/TC 83 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-01-07 2019-04-01
Stationary training equipment —
Part 2:
Strength training equipment, additional specific safety
requirements and test methods
Équipement d'entraînement fixe —

Partie 2: Équipement d'entraînement de force, exigences spécifiques de sécurité et méthodes d'essai

supplémentaires
ICS: 97.220.30
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
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NATIONAL REGULATIONS.
ISO/DIS 20957-2:2019(E)
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oSIST prEN ISO 20957-2:2019
ISO/DIS 20957-2:2019(E)
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ii © ISO 2019 – All rights reserved
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oSIST prEN ISO 20957-2:2019
ISO/DIS 20957-2:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Classification ............................................................................................................................................................................................................ 3

5 Safety requirements ......................................................................................................................................................................................... 4

5.1 General ........................................................................................................................................................................................................... 4

5.2 Stability .......................................................................................................................................................................................................... 4

5.2.1 General...................................................................................................................................................................................... 4

5.2.2 Externally loaded equipment ................................................................................................................................ 4

5.3 Loading .......................................................................................................................................................................................................... 4

5.3.1 Selectorized equipment and alternative resistance training equipment ........................ 4

5.3.2 Externally loaded equipment ................................................................................................................................ 4

5.4 Endurance ................................................................................................................................................................................................... 5

5.4.1 General...................................................................................................................................................................................... 5

5.4.2 Additional requirements for externally loaded equipment ........................................................ 6

5.5 Access to squeeze and/or shear points ............................................................................................................................. 6

5.5.1 Stacked weights or alternative means of resistance ......................................................................... 6

5.5.2 Weight disc clearance for externally loaded weights ....................................................................10

5.6 Weight disk retention .....................................................................................................................................................................11

5.7 Entrapment .............................................................................................................................................................................................11

5.8 Pull-in points .........................................................................................................................................................................................11

5.9 Additional instructions for use ..............................................................................................................................................12

5.10 Additional marking ..........................................................................................................................................................................13

6 Test methods ..........................................................................................................................................................................................................13

6.1 General ........................................................................................................................................................................................................13

6.1.1 Dimensional check ......................................................................................................................................................13

6.1.2 Visual examination ......................................................................................................................................................13

6.1.3 Tactile examination.....................................................................................................................................................13

6.1.4 Performance test ...........................................................................................................................................................13

6.2 Testing of externally loaded equipment .........................................................................................................................13

6.3 Loading test ............................................................................................................................................................................................14

6.3.1 Weight posts intended for training ...............................................................................................................14

6.3.2 Weight posts intended for storage.................................................................................................................14

6.3.3 Extrinsic loading test ........................................................................................................................................... ......14

6.3.4 Catch mechanism for guided path equipment loading test .....................................................14

6.4 Endurance test .....................................................................................................................................................................................14

6.4.1 General...................................................................................................................................................................................14

6.4.2 Additional requirements for externally loaded equipment .....................................................14

6.5 Testing the weight support ........................................................................................................................................................15

6.6 Drop test for guided barbell equipment ........................................................................................................................15

7 Test report ................................................................................................................................................................................................................15

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oSIST prEN ISO 20957-2:2019
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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/iso/foreword .html.

ISO 20957-2 was prepared by the European Committee for Standardization (CEN) Technical Committee

CEN/TC 136, Sports, playground and other recreational facilities and equipment, in collaboration with

ISO Technical Committee ISO/TC 83, Sports and other recreational facilities and equipment, in accordance

with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 20957-2:2005), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— the formulation has been aligned to ISO 20957-1;
— specific terms and definitions for Part 2 have been added to Clause 3;
— Clause 5 has been specified and restructured;
— Clause 6 has been specified and restructured;

— Additional requirements for externally loaded equipment have been added to Clause 5 and 6;

A list of all parts in the ISO 20957- series can be found on the ISO website.
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oSIST prEN ISO 20957-2:2019
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Introduction
This part of ISO 20957 concerns the safety of strength training equipment.

This part of ISO 20957 amends and supplements ISO 20957-1. The requirements of this specific standard

take precedence over those in the general standard.
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oSIST prEN ISO 20957-2:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 20957-2:2019(E)
Stationary training equipment —
Part 2:
Strength training equipment, additional specific safety
requirements and test methods
1 Scope

This part of ISO 20957 specifies additional safety requirements for stationary strength training

equipment in addition to the general safety requirements of ISO 20957-1.

This part of ISO 20957 is applicable to stationary training equipment type strength training equipment

with stack weight resistance or other means of resistance like elastic cords, hydraulic, pneumatic,

electrical, magnetic, springs and externally loaded weights (type 2) (hereinafter referred to as training

equipment) with the classes H, S and I according to ISO 20957-1.

NOTE Free-weight barbell racks are subject to the requirements of ISO 20957-4 and ISO 20957-1.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 20957-1, Stationary training equipment — Part 1: General safety requirements and test methods

ISO/TR 7250-2:2010, Basic human body measurements for technological design — Part 2: Statistical

summaries of body measurements from national populations
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 20957-1 and the following apply.

3.1
selectorized equipment

strength training equipment where the resistance means is a load that is an integral part of the device

and can be varied by the user without adding or removing components to and from the equipment

3.2
externally loaded equipment

strength training equipment where the main resistance means is a load that is not an integral part of

the device and can be varied by the user by adding or removing components to and from the equipment

Note 1 to entry: Components to be added or removed are e. g. weight discs or bands.

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oSIST prEN ISO 20957-2:2019
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3.3
guided barbell equipment

various types of vertical or inclined frame structure with an integral constrained bar for loading

weight plates which travels along a guided path with indexing engagement means that allow the bar to

be started and stopped at multiple positions along the range of travel

Note 1 to entry: Examples are shown in Figure 1b) and Figure 1c). Commonly used names for this equipment are

"Smith press", "Smith Machine" and "multipress".
3.4
drop stop

a permanent or adjustable constructive element creating a preset minimum stop position that provides

the user with clearance to avoid entrapment without any further action of the user

3.5
catch mechanism

rest or holder for a barbell on a guided barbell equipment, or for a carriage on a sled leg press need to

engaged by the user, from which the user can begin the exercise motion or end at the completion of the

exercise
3.6
maximum storage load

load that can be applied to weight post and/or external weight storage equipment as specified by the

manufacturer
3.7
maximum specified training load

maximum working load as specified by the manufacturer, but not including the user weight

3.8
work arm

a component of a strength training equipment that allows the user to activate a resistance means

controlled and directed motion for a specific exercise

Note 1 to entry: An example for equipment where this component is relevant is shown in Figure 1a).

3.9
training resistance
force or torque exerted by the user to perform the exercise
3.10
weight post

structure protruding from the frame of externally loaded equipment for the purpose of holding weight

either for a resistance means or for storage
3.11
work arm actuated externally loaded training equipment

equipment where the external load is attached directly or indirectly to a movement mechanism that is

displaced intentionally by the user
Note 1 to entry: An example is shown in Figure 1a).
3.12
guided externally loaded strength training equipment

equipment where the external load is placed on a weight post affixed to a carriage that is moving on

guided path
Note 1 to entry: Examples are shown in Figure 1b) and Figure 1c).
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oSIST prEN ISO 20957-2:2019
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Key
1 catch mechanism 4 barbell
2 drop stop 5 work arm
3 guid 6 carriage

Figure 1 — Examples for different types of externally loaded strength training equipment -

a) Work arm activated b) and c) guided types
3.13
stacked weights
guided weights stacked together where the training load can be selected
4 Classification
ISO 20957-1 applies.
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5 Safety requirements
5.1 General

Depending on the design of the training equipment the following requirements shall apply as

appropriate.
5.2 Stability
5.2.1 General

The equipment shall be stable in any direction and loading condition in training, folding and storage

positions.
Test in accordance with the stability test in ISO 2
...

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