EN 1335-1:2020/FprA1

Office furniture - Office work chair - Part 1: Dimensions - Determination of dimensions

This part of prEN 1335:2017 applies to office work chairs. It specifies dimensions of three types of chairs as well as test methods for their determination.
Annex A (informative) contains a Rationale for office chair features and comparison between current published dimensions with European anthropometric data.

Büromöbel - Büro-Arbeitsstuhl - Teil 1: Maße - Bestimmung der Maße

Mobilier de bureau - Sièges de travail de bureau - Partie 1 : Dimensions - Détermination des dimensions

Pisarniško pohištvo - Pisarniški delovni stoli - 1. del: Mere - Ugotavljanje mer - Dopolnilo A1

General Information

• Status: Not Published
• Publication Date: 06-Feb-2023
• ICS: 97.140 - Furniture
• Technical Committee: CEN/TC 207 - Furniture
• Drafting Committee: CEN/TC 207/WG 3 - Thermal insulation of building equipment and industrial installations - Procedure for the determination of reference thermal conductivity of products - Revision
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 08-Sep-2022
• Due Date: 25-Nov-2022
• Completion Date: 08-Sep-2022
• Ref Project: SIST EN 1335-1:2020/kFprA1:2022 - Office furniture - Office work chair - Part 1: Dimensions - Determination of dimensions

Relations

• Merged Into: EN 1335-1:2020+A1:2022 - Office furniture - Office work chair - Part 1: Dimensions - Determination of dimensions
• Effective Date: 18-Jan-2023
• Amends: EN 1335-1:2020 - Office furniture - Office work chair - Part 1: Dimensions - Determination of dimensions
• Effective Date: 11-Nov-2020

Overview

EN 1335-1:2020/FprA1 is a draft amendment (prA1) to the European standard EN 1335-1:2020 produced by CEN/TC 207. It specifies methods for determination of dimensions for office work chairs and updates normative references (notably to ISO 24496:2021). The amendment clarifies definitions, updates measurement procedures and figures, and replaces the dimensional requirements table so designers, manufacturers and test laboratories can reliably assess and compare office chair dimensions against European anthropometric evidence.

Key topics and technical requirements

• Scope: Applies to office work chairs and establishes how to measure key dimensions and record results for compliance and comparison.
• Measurement methods: Revised references to ISO 24496:2021 and added guidance (including a new Figure 3) defining angle origin and sign conversion for consistent measurements.
• Definitions updated: Clarifications for chair types (e.g., Type Ax with largest seat-height adjustment), foot support definition for tall chairs, and other term refinements.
• Dimensional requirements: Table 2 is replaced with explicit dimensional limits and ranges for chair types (Type Ax, A, B, C). Parameters include:
  • Seat height and sitting height (including tall-chair measurement with foot support)
  • Seat depth (adjustable vs fixed)
  • Lumbar support height and adjustment range
  • Backrest height/width and radius
  • Armrest height, width and clearances (templates and gap retention across adjustment)
  • Hip breadth clearance and seat pad dimensions
• Test report: Additional test-report requirement to state whether seat height or sitting height was measured.
• Annex A (informative): Rationale for chosen dimensions and a comparison with European anthropometric data; updates reflect allowance for footwear and small editorial clarifications.

Practical applications and target users

This amendment is practical for:

• Manufacturers and product designers: to design chairs that meet European dimensional norms and ergonomic fit ranges.
• Test laboratories and conformity assessors: to carry out repeatable measurements and report compliance.
• Procurement/specifiers and workplace ergonomists: to define requirements in tenders and ensure furniture fits user populations.
• Standards bodies and technical committees: for harmonizing national standards and translations.

Typical uses include product development, type testing, certification, procurement specifications, and ergonomic assessments.

Related standards

• ISO 24496:2021 - Methods for the determination of dimensions for office chairs (referenced and aligned in this amendment).
• EN 1335 series - EN 1335-1:2020 (base document amended by prA1).

Keywords: EN 1335-1:2020/FprA1, office work chair dimensions, measurement methods, dimensional requirements, ISO 24496:2021, ergonomic chair standards, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 1335-1:2020/oprA1:2021
01-september-2021
Pisarniško pohištvo - Pisarniški delovni stoli - 1. del: Mere - Ugotavljanje mer -
Dopolnilo A1
Office furniture - Office work chair - Part 1: Dimensions - Determination of dimensions
Büromöbel - Büro-Arbeitsstuhl - Teil 1: Maße - Bestimmung der Maße
Mobilier de bureau - Sièges de travail de bureau - Partie 1 : Dimensions - Détermination
des dimensions
Ta slovenski standard je istoveten z: EN 1335-1:2020/prA1
ICS:
97.140 Pohištvo Furniture
SIST EN 1335-1:2020/oprA1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 1335-1:2020/oprA1:2021

SIST EN 1335-1:2020/oprA1:2021

DRAFT
EUROPEAN STANDARD
EN 1335-1:2020
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
September 2021
ICS 97.140
English Version
Office furniture - Office work chair - Part 1: Dimensions -
Determination of dimensions
Mobilier de bureau - Sièges de travail de bureau - Büromöbel - Büro-Arbeitsstuhl - Teil 1: Maße -
Partie 1 : Dimensions - Détermination des dimensions Bestimmung der Maße
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 207.

This draft amendment A1, if approved, will modify the European Standard EN 1335-1:2020. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.
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 supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

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 1335-1:2020/prA1:2021 E
worldwide for CEN national Members.

SIST EN 1335-1:2020/oprA1:2021
EN 1335-1:2020/prA1:2021 (E)
Contents Page
European foreword . 3
1 Modification to Clause 2, Normative references . 4
2 Modification to Clause 3, Terms and definitions . 4
3 Modification to Clause 4, Definitions of measurements . 4
4 Modification to 5.1 General . 4
5 Modification to Clause 6, Test equipment including CMD . 4
6 Modification to Clause 7, Measurement methods and procedures . 4
7 Modification to Clause 8 Dimensional requirements . 6
8 Modification to Clause 10, Test report . 11
9 Modification to Annex A . 11
10 Modification to Annex D . 11

SIST EN 1335-1:2020/oprA1:2021
EN 1335-1:2020/prA1:2021 (E)
European foreword
This document (EN 1335-1:2020/prA1:2021) has been prepared by Technical Committee CEN/TC 207
“Furniture”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
SIST EN 1335-1:2020/oprA1:2021
EN 1335-1:2020/prA1:2021 (E)
1 Modification to Clause 2, Normative references
Replace the following reference
ISO 24496:2017, Office furniture — Office chairs — Methods for the determination of dimensions
by
ISO 24496:2021, Office furniture — Office chairs — Methods for the determination of dimensions
2 Modification to Clause 3, Terms and definitions
Add Note 1 to entry: to definition 3.2 type Ax work chair by
“Note 1 to entry: Type Ax chair has the largest range of adjustment for the seat height, a smaller seat depth
dimension and a smaller distance from the backrest to the front of the armrests”
Replace definition 3.8 foot support by
“3.8
foot support
component intended to support the feet of the user and assist the user getting on or off a tall office work
chair
Note 1 to entry: A foot support might or might not to be permanently attached to the structure of a tall office work
chair. “
3 Modification to Clause 4, Definitions of measurements
Replace the date in the first sentence
“2017” by “2021”
4 Modification to 5.1 General
Replace the date in the first sentence
“2017” by “2021”
5 Modification to Clause 6, Test equipment including CMD
Replace the date in the first sentence
“2017” by “2021”.
6 Modification to Clause 7, Measurement methods and procedures
Replace the date in the first and second sentence
“2017” by “2021”
In Table 1, replace the date wherever it occurs
“2017” by 2021”
In Table 1 for the following rows
Sequence 6
Replace in column 4 (ISO 24496:2017 reference) the word
SIST EN 1335-1:2020/oprA1:2021
EN 1335-1:2020/prA1:2021 (E)
“Go through” by “From” and delete “and”
Add in column 4 (ISO 24496:2017 reference)
“See also Figure 3 in this document”
Sequence 7
Replace the word in column 4 (ISO 24496:2017 reference)
“Go through” by “From” and delete “and”
Add in column 4 (ISO 24496:2017 reference)
“See also Figure 3 in this document”
Sequence 8
Replace the word in column 3 (Dimension description)
“Zero” by “0°”
Sequence 12
Delete in column 4 (ISO 24
...