ISO/FDIS 24975

Furniture — Beds and mattresses — Methods of measurement and recommended tolerances

This document specifies methods of measurement for the determination of the dimensions of all types of mattresses, bed frames, divans and bed bases intended for adult size. It also includes recommended tolerances based on any nominal dimension, in order to ensure the correct fit between the bed components. It does not apply to air beds and water beds, nor to mattress pads that are placed on top of the main support mattress. It does not apply to the dimensions of bed bases for bunk beds and high beds.

Ameublement — Lits et matelas — Méthodes de mesure et tolérances recommandées

General Information

• Status: Not Published
• ICS: 97.140 - Furniture
• Technical Committee: ISO/TC 136 - Furniture
• Drafting Committee: ISO/TC 136/WG 7 - Mattresses – Methods of test
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 12-Nov-2025
• Completion Date: 12-Nov-2025

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 136
Furniture — Beds and mattresses
Secretariat: UNI
— Methods of measurement and
Voting begins on:
recommended tolerances
2025-11-12
Ameublement — Lits et matelas — Méthodes de mesure et
Voting terminates on:
tolérances recommandées
2026-01-07
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 136
Furniture — Beds and mattresses
Secretariat: UNI
— Methods of measurement and
Voting begins on:
recommended tolerances
Ameublement — Lits et matelas — Méthodes de mesure et
Voting terminates on:
tolérances recommandées
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions . 2
4.1 Preparation .2
4.2 Measuring accuracy .2
5 Test apparatus . 2
6 Methods of measurement . 3
6.1 External plan dimensions of mattresses and bed bases .3
6.2 Internal plan dimensions of bed frames .4
6.3 Determination of the height of mattresses and divan bases .4
7 Recommended tolerances . 5
8 Test report . 5

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 136, Furniture.
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
Introduction
This document establishes a method for the determination of the essential dimensions of mattresses, bed
frames, divans and bed bases.
In order to help manufacturers, retailers and consumers to get the correct fit between the bed components,
a nominal dimension, D, has been introduced and tolerances to the nominal dimension are recommended.

v
FINAL DRAFT International Standard ISO/FDIS 24975:2025(en)
Furniture — Beds and mattresses — Methods of
measurement and recommended tolerances
1 Scope
This document specifies methods of measurement for the determination of the dimensions of all types of
mattresses, bed frames, divans and bed bases
...

ISO/TC 136
Secretariat: UNI
Date: 2025-10-1728
Furniture — Beds and mattresses — Methods of measurement and
recommended tolerances
Ameublement — Lits et matelas — Méthodes de mesure et tolérances recommandées
FDIS stage
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
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions . 2
4.1 Preparation . 2
4.2 Measuring accuracy . 2
5 Test apparatus . 2
6 Methods of measurement . 3
6.1 External plan dimensions of mattresses and bed bases . 3
6.2 Internal plan dimensions of bed frames . 5
6.3 Determination of the height of mattresses and divan bases . 5
7 Recommended tolerances . 5
8 Test report . 5

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 136, Furniture.
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
Introduction
This document establishes a method for the determination of the essential dimensions of mattresses, bed
frames, divans and bed bases.
In order to help manufacturers, retailers and consumers to get the correct fit between the bed components, a
nominal dimension, D, has been introduced and tolerances to the nominal dimension are recommended.
v
Furniture — Beds and mattresses — Methods of measurement and
recommended tolerances
1 Scope
This document specifies methods of measurement for the determination of the dimensions of all types of
mattresses, bed frames, divans and bed bases intended for adult size.
It also includes recommended tolerances based on any nominal dimension, in order to ensure the correct fit
between the bed components.
This document does not apply to the following:
— Airair beds/mattresses and water beds/mattresses;
— Mattressmattress pads that are placed on top of the main support mattress;
— Dimensionsdimensions of bed bases for bunk beds and high beds.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
nominal dimension
D
dimension used by the manufacturer to describe the size of an item
3.2
unframed slat base
bed base consisting of separate slats flexibly held together normally by means of textile, rubber or plastic tape
Note 1 to entry: When loading one slat, the load is transferred to the support by that slat only.
3.3
framed bed base
bed base consisting of slats, springs, etc., which are connected to a structural frame system
N
...