 DEAS 1150: 2023  
ICS 83.083.01  
 
© EAC 2023                                                                                                                               First Edition 2023  
 
DRAFT EAST AFRICAN STANDARD  
Plastic monobloc ch air — Specification  
EAST AFRICAN COMMUNITY  
 DEAS 1150: 2023  
ii © EAC 2023  – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards development process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduce d, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission to reproduce this document for the purpose of selling it should be addressed as 
shown below or to EAC’s member body in the country  of the requester:  
© East African Community  2023 — All rights reserved  
East African Community  
P.O. Box 1096 , 
Arusha  
Tanzania  
Tel: + 255 27 2 162100  
Fax: + 255 27 2162190  
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       Web: www.eac -quality.net   
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  Violators 
may be prosecuted . DEAS 1150: 2023  
© EAC 202 3 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ...................  vi 
1 Scope  ................................ ................................ ................................ ................................ .............  1 
2 Normative references  ................................ ................................ ................................ ...................  1 
3 Terms and definitions  ................................ ................................ ................................ ..................  1 
4 Requirements  ................................ ................................ ................................ ................................  2 
4.1 General Re quirements  ................................ ................................ ................................ .................  2 
4.2 Performance  ................................ ................................ ................................ ................................ .. 2 
4.2.1  Seat loading point (SLP) and back loading point (BLP) determination  ................................ .. 2 
4.2.2  Seat static load test ................................ ................................ ................................ ......................  2 
4.2.3  Back static load test  ................................ ................................ ................................ .....................  2 
4.2.4  Arm sideways static load test  ................................ ................................ ................................ ..... 2 
4.2.5  Arm downwards static load test  ................................ ................................ ................................ . 2 
4.2.6  Seat fatigue test  ................................ ................................ ................................ ............................  2 
4.2.7  Back fatigue test  ................................ ................................ ................................ ...........................  2 
4.2.8  Leg forward static load test  ................................ ................................ ................................ .........  3 
4.2.9  Leg rearward static load test  ................................ ................................ ................................ ....... 3 
4.2.10  Leg sideways static load test  ................................ ................................ ................................ ...... 3 
4.2.11  Seat impact test  ................................ ................................ ................................ ............................  3 
4.2.12  Drop test  ................................ ................................ ................................ ................................ ........  3 
4.3 Stability  ................................ ................................ ................................ ................................ ..........  4 
4.3.1  General  ................................ ................................ ................................ ................................ ..........  4 
4.3.2  Performance requirements  ................................ ................................ ................................ ..........  4 
4.4 Final inspection  ................................ ................................ ................................ ............................  4 
5 Marking and labelling  ................................ ................................ ................................ ...................  5 
6 Test report  ................................ ................................ ................................ ................................ ..... 5 
Annex  A (normative)  Chair inspection for damage and dimensional change  ................................ ... 6 
A.1 Scope  ................................ ................................ ................................ ................................ .............  6 
A.2 Principle  ................................ ................................ ................................ ................................ ........  6 
A.3 Apparatus  ................................ ................................ ................................ ................................ ...... 6 
A.4 Initial inspection procedure  ................................ ................................ ................................ ........  6 
A.5 Final inspection procedure  ................................ ................................ ................................ .........  7 
A.6 Test report  ................................ ................................ ................................ ................................ ..... 8 
Annex  B (Normative)  Determination of seat loading point (SLP) and back loading point (BLP)  ..... 9 
B.1 Scope  ................................ ................................ ................................ ................................ .............  9 
B.2 Principle  ................................ ................................ ................................ ................................ ........  9 
B.3 Apparatus  ................................ ................................ ................................ ................................ ...... 9 
B.4 Test conditions  ................................ ................................ ................................ ...........................  10 
B.5 Procedure  ................................ ................................ ................................ ................................ .... 10 
Annex  C (normative)  Seat static load test  ................................ ................................ ...........................  12 
C.1 Scope  ................................ ................................ ................................ ................................ ...........  12 
C.2 Principle  ................................ ................................ ................................ ................................ ...... 12 
C.3 Apparatus  ................................ ................................ ................................ ................................ .... 12 
C.4 Test conditions  ................................ ................................ ................................ ...........................  12 
C.5 Procedure  ................................ ................................ ................................ ................................ .... 12 
C.6 Test report  ................................ ................................ ................................ ................................ ... 13 
Annex  D (normative)  Back static load test with back deformation assessment  .............................  14 
D.1 Scope  ................................ ................................ ................................ ................................ ...........  14 
D.2 Principle  ................................ ................................ ................................ ................................ ...... 14 
D.3 Apparatus  ................................ ................................ ................................ ................................ .... 14 
D.4 Test conditions  ................................ ................................ ................................ ...........................  15 
D.5 Procedure  ................................ ................................ ................................ ................................ .... 15 DEAS 1150: 2023  
iv © EAC 2023  – All rights reserved  
 D.6 Test report  ................................ ................................ ................................ ................................ .. 16 
Annex  E (nor mative)  Arm sideways static load test  ................................ ................................ ..........  17 
E.1 Scope  ................................ ................................ ................................ ................................ ..........  17 
E.2 Principle  ................................ ................................ ................................ ................................ ...... 17 
E.3 Apparatus  ................................ ................................ ................................ ................................ ... 17 
E.4 Test conditions  ................................ ................................ ................................ ..........................  17 
E.5 Proc edure  ................................ ................................ ................................ ................................ ... 17 
E.6 Test report  ................................ ................................ ................................ ................................ .. 18 
Annex  F (normative)  Arm downwards static load test  ................................ ................................ ....... 19 
F.1 Scope  ................................ ................................ ................................ ................................ ..........  19 
F.2 Principle  ................................ ................................ ................................ ................................ ...... 19 
F.3 Apparatus  ................................ ................................ ................................ ................................ ... 19 
F.4 Test conditions  ................................ ................................ ................................ ..........................  20 
F.5 Procedure  ................................ ................................ ................................ ................................ ... 20 
F.6 Test report  ................................ ................................ ................................ ................................ .. 20 
Annex  G (normative)  Seat fatigue test  ................................ ................................ ................................ . 22 
G.1 Scope  ................................ ................................ ................................ ................................ ..........  22 
G.2 Principle  ................................ ................................ ................................ ................................ ...... 22 
G.3 Apparatus  ................................ ................................ ................................ ................................ ... 22 
G.4 Test conditions  ................................ ................................ ................................ ..........................  22 
G.5 Procedure  ................................ ................................ ................................ ................................ ... 22 
G.6 Test repor t ................................ ................................ ................................ ................................ .. 23 
Annex  H (normative)  Back fatigue test  ................................ ................................ ................................  24 
H.1 Scope  ................................ ................................ ................................ ................................ ..........  24 
H.2 Principle  ................................ ................................ ................................ ................................ ...... 24 
H.3 Apparatus  ................................ ................................ ................................ ................................ ... 24 
H.4 Test conditions  ................................ ................................ ................................ ..........................  24 
H.5 Procedure  ................................ ................................ ................................ ................................ ... 24 
H.6 Test report  ................................ ................................ ................................ ................................ .. 25 
Annex   I (normative)  Leg forward static load test  ................................ ................................ ..............  26 
I.1 Scope  ................................ ................................ ................................ ................................ ..........  26 
I.2 Principle  ................................ ................................ ................................ ................................ ...... 26 
I.3 Apparatus  ................................ ................................ ................................ ................................ ... 26 
I.4 Test conditions  ................................ ................................ ................................ ..........................  26 
I.5 Procedure  ................................ ................................ ................................ ................................ ... 26 
I.6 Test repor t ................................ ................................ ................................ ................................ .. 27 
Annex   J (normative)  Leg rearward static load test  ................................ ................................ ...........  28 
J.1 Scope  ................................ ................................ ................................ ................................ ..........  28 
J.2 Principle  ................................ ................................ ................................ ................................ ...... 28 
J.3 Apparatus  ................................ ................................ ................................ ................................ ... 28 
J.4 Test conditions  ................................ ................................ ................................ ..........................  28 
J.5 Procedure  ................................ ................................ ................................ ................................ ... 28 
J.6 Test report  ................................ ................................ ................................ ................................ .. 29 
Annex   K (normative)  Leg sideways static load test  ................................ ................................ ..........  30 
K.1 Scope  ................................ ................................ ................................ ................................ ..........  30 
K.2 Principle  ................................ ................................ ................................ ................................ ...... 30 
K.3 Apparatus  ................................ ................................ ................................ ................................ ... 30 
K.4 Test conditions  ................................ ................................ ................................ ..........................  30 
K.5 Procedure  ................................ ................................ ................................ ................................ ... 30 
K.6 Test report  ................................ ................................ ................................ ................................ .. 31 
Annex   L (no rmative)  Seat impact test  ................................ ................................ ................................  32 
L.1 Scope  ................................ ................................ ................................ ................................ ..........  32 
L.2 Principle  ................................ ................................ ................................ ................................ ...... 32 
L.3 Apparatus  ................................ ................................ ................................ ................................ ... 32 
L.4 Test conditions  ................................ ................................ ................................ ..........................  33 
L.5 Procedure  ................................ ................................ ................................ ................................ ... 33 DEAS 1150: 2023  
© EAC 202 3 – All rights reserved  v 
 L.6 Test report  ................................ ................................ ................................ ................................ ... 34 
Annex   M (normative)  Drop test  ................................ ................................ ................................ ............  35 
M.1 Scope  ................................ ................................ ................................ ................................ ...........  35 
M.2 Principle  ................................ ................................ ................................ ................................ ...... 35 
M.3 Apparatus  ................................ ................................ ................................ ................................ .... 35 
M.4 Test conditions  ................................ ................................ ................................ ...........................  35 
M.5 Procedure  ................................ ................................ ................................ ................................ .... 35 
M.6 Test repor t ................................ ................................ ................................ ................................ ... 36 
Annex   N (normative)  Rearward overturning  ................................ ................................ .......................  37 
N.1 Scope  ................................ ................................ ................................ ................................ ...........  37 
N.2 Principle  ................................ ................................ ................................ ................................ ...... 37 
N.3 Apparatus  ................................ ................................ ................................ ................................ .... 37 
N.4 Test conditions  ................................ ................................ ................................ ...........................  37 
N.5 Procedure  ................................ ................................ ................................ ................................ .... 37 
N.6 Test report  ................................ ................................ ................................ ................................ ... 38 
Annex   O (normative)  Frontward overturning  ................................ ................................ .....................  39 
O.1 Scope  ................................ ................................ ................................ ................................ ...........  39 
O.2 Principle  ................................ ................................ ................................ ................................ ...... 39 
O.3 Apparatus  ................................ ................................ ................................ ................................ .... 39 
O.4 Test conditions  ................................ ................................ ................................ ...........................  39 
O.5 Procedure  ................................ ................................ ................................ ................................ .... 39 
O.6 Test report  ................................ ................................ ................................ ................................ ... 40 
Bibliography  ................................ ................................ ................................ ................................ .............  41 
 DEAS 1150: 2023  
vi © EAC 2023  – All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barri ers that are encountered when goods and services are exchanged within 
the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and issue 
East African Standards  (EAS) . The Committee is comp osed of representatives of the National Standards Bodies 
in Partner States, together with the representatives from the public and private sector organizations  in the 
community .  
East African Standards are developed through  Technical Committees that are rep resentative of key 
stakeholders including government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the Partner 
States. The comme nts received are discussed and incorporated before finalization of standards, in accordance 
with the Principles and procedures for develop ment of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances . Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 072, Plastics and related 
products.  
Attention is drawn to the possibility that some of the elements of this document  may be subject of patent rights. 
EAC shall not be held responsible for identifying any or all such patent rights.  DEAS 1150: 2023  
© EAC 202 3 – All rights reserved  vii 
 Introduction  
This East African Standard allows for  two levels of performance based on the end use of the chair, domestic or 
commercial. The forces used are sufficient to apply to chairs intended for adult use and also to ensure that a 
chair meets the minimum requirements in its intended environment, but d o not ensure that failure will not 
eventually occur either as a result of habitual misuse or after three years of service.  
With the exception of the seat and back loading point determination and the seat impact test, test results are 
dependent on the load s being correctly applied, therefore for the remaining tests, apparatus equivalent to that 
listed may be used. In the case of designs not catered for in the test procedures, the test should be carried out 
as closely as possible to that described and deviat ions from the test procedure noted on the test report.  
The strength and durability of the chair are determined by the application of static, impact and fatigue tests. The 
forces used are sufficient to allow for normal functional use. Strength and dur ability are detailed in Clause 4 . 
The stability of the chair is determined by both the application of impact forces and by applying loads that could 
normally be encountered. Stability is detailed in Clause 5 and by tilting the chair to simulate normal functiona l 
use. The tests provide a procedure that will allow comparative analysis of the stability of various chairs under 
relatively fixed conditions. Chair stability is related to personal sitting habits, chair style, use conditions, floor 
finish and condition a s well as design of the chair legs, which are variables complicating the fixing of minimum 
requirements. The minimum acceptance level is based on the weight and style of chair for both forwards and 
rearwards overturnin g 
 DRAFT EAST AFRICAN STANDARD  DEAS 1150: 2023  
 
© EAC 2023  – All rights reserved  1 
 Plastic monobloc chair  — Specification  
1 Scope  
This Draft East African Standard specifies requirements and test methods for the evaluation and selection of 
plastic monobloc chairs for adults.  
This standard does not cover chairs intended for children and bathroom use . 
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 reference d document (including any amendments) applies.  
ISO 2439 , Flexible cellular polymer materials — Determination of hardness (indentation technique)  
3 Terms and definitions  
For the purposes of this document, the following terms and definitions apply.  
ISO and I EC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1  
commercial  
any item used in other than domestic premises  
3.2  
domestic  
any item used in the home, whether it is for indoor or outdoor use  
4.3  
impact tests  
tests to assess the strength of the chair under the rapid rates of loading that only occasionally occur  
3.4  
strength and durability tests  
tests simulating the repeated cyclic loading of the chair occurring during long -term use and assessing the 
strength of the chair under such conditions.   
2 © EAC 2023  – All rights reserved  
 4 Requirements  
4.1 General Requirements  
4.1.1  When  examined visually the chair shall not have sharp projections, sharp edges or other features that 
may trap clothing or cause  injury to the user and other persons movin g in the vicinity of the chair.  
4.1.2  At least one week, in normal indoor conditions shal l have elapsed between manufacture and testing.  
4.1.3  The chair shall be measured and inspected in accordance with A.4, Annex A.  
4.2 Performance  
The tests and determinations specified in 4.2.1 to 4.2.1 2 shall be performed in sequence and on the same chair 
until failure occurs.  
4.2.1 Seat loading point (SLP) and back loading point (BLP) determination  
The SLP and BLP shall be determined in accordance with Annex B.  
4.2.2 Seat static load test  
When tested in accordance with Annex C and with the force specifie d for the relevant test level in Table 1, the 
chair shall not break or show distortion in excess of that specified in 4 .4.  
4.2.3 Back static load test  
When tested in accordance with Annex D and with the force specified for the relevant test level in Table  1, the 
chair shall not break or show distortion in e xcess of that specified in 4. 4 The chair back -dimension 'Y' shall not 
increase by more than 10 % under the applied load (see Figure A.3).  
4.2.4 Arm sideways static load test  
When tested in accordance with Annex E and with the force specified for the relevant test level in Table 1, the 
chair arms shall remain intact and not break or show distortion in excess of that specified in 4. 4. 
4.2.5 Arm downwards static load test  
When t ested in accordance with Annex F and with the force specified for the relevant test level in Table 1, the 
chair arms shall remain intact and not break or show distortion in exce ss of that specified in 4 .4. The deflection 
of the arms under the applied load shall not exceed the following:  
a) 100 mm or 40 % of the arm  height measured above the seat in the case of domestic l evel; and  
b) 80 mm or 32 % of the arm height measured above the seat (whichever is the smaller) in the case of 
commercial l evel.  
4.2.6 Seat fa tigue test  
When tested in accordance with Annex G and for the number of cycles specified for the relevant test level in 
Table 1, the seat of the chair shall not break or show distortion in excess of that specified in 4 .4.  
4.2.7 Back fatigue test  
When te sted in accordance with Annex H and for the number of cycles specified for the relevant test level in 
Table 1, the back of the chair shall not break or show distortion in excess of that specified in 4 .4.   
© EAC 202 3 – All rights reserved  3 
 4.2.8 Leg forward static load test  
When tested in accordance with Annex I and with the load specified for the relevant test level in Table 1, the 
front legs of the chair shall not break or show distortion in excess of that specified in 4 .4.  
4.2.9 Leg rearward static load test  
When tested in accordance with Annex J and with the load specified for the relevant test level in Table 1, the 
rear legs of the chair shall not break or show distortion in excess of that specified in 4 .4.  
4.2.10 Leg sideways static load test  
When tested in accordance with Annex K and with the load specified for the relevant test level in Table 1 the 
two legs supporting the chair shall not break.  
4.2.11 Seat impact test  
When tested in accordance with Annex L and impacted from the height speci fied for the relevant test level in 
Table 1, the seat of the chair shall not break.  
4.2.12 Drop test  
When tested in accordance with Annex M and dropped from the height specified for the relevant test level in 
Table 1, the chair shall not break.  
Table 1 ─ Testing requirements for strength, durability and stability  
Test Loading a Test Levels  
Clause  Strength and durability  Domestic  Commercial  
4.2.2 Seat static loadb Can be combined  Force N  
Number of times at 
each two locations  1600  
10 2000  
10 
4.2.3 Back static loadb Force, N  560 760 
Balancing load  Force, N  
Number of times  1600  
10 2000  
10 
4.2.4 Am sideways static loadb Force, N  
Number of times  600 
10 900 
10 
4.2.5 Arm downward static loadb Force, N  
Number of times 
(both arms)  1800  
10 2000  
10 
4.2.6 Seat fatigue c To be combined  Cycles  
Seat load, N  100 000  
950 200 000  
950 
4.2.7 Back fatigue c Cycles  100 000  200 000  
Balancing load  Back load, N  
Seat load, N  330 
950 330 
950 
4.2.8 and 4.2.9 Leg forward and rearward static load b Seat load, N  
Number of times  1250  
10 1800  
10 
4.2.10 Leg sideways static load b Seat load, N  
Lift height ,mm 1250  
≥150 1800  
≥150  
4 © EAC 2023  – All rights reserved  
 Number of times  10 10 
4.2.11 Seat impact  Impactor weight, kg  
Drop height, mm  
Number of times at 
each of two 
locations  25 
240 
10 25 
300 
10 
4.2.12  Drop test  Height, mm  1 000 1 500  
Angle, degrees  10 10 
Number of times  10 10 
Stability  
4.3.2.1 Rearward overturning  Force, N  ≥156  ≥156  
4.3.2.2 Frontward overturning  %of total chair 
weight  ≥40 ≥40 
a Tolerances shall be within ± 5.0 % for all forces, ± 5.0 % for all masses and ±1.0 mm for all di mensions.  
b The forces in static load shall be applied sufficiently slowly to ensure that negligible dynamic load  is applied . It is 
recommended that static load tests be carried out at a maximum rate  of six times per min . 
C The forces in durability tests shall be applied sufficiently slowly to ensure kinetic heating does not occur.  
NOTE  Severity of loading may be varied by the number of applications or the magnitude of the loads applied . 
 
4.3 Stability  
4.3.1 General  
The tests specifi ed in 4 .3.2.1, 4.3.2.2 and 4 .4 shall be performed in sequence and on the same chair as tested 
in 4.2. 
4.3.2 Performance requirements  
4.3.2.1 Rearward overturning  
When tested in accordance with Annex N, the front  legs shall not leave the floor.  
4.3.2.2 Frontward overturning  
When tested in accordance with Annex O, the rear legs shall not leave the floor.  
4.4 Final inspection  
When all tests have been completed in accordance with Annex B to O, and inspected in accordance with A.5, 
Annex A, the chair shall  
a) be in accordance with 4 .1.1 in general appearance and function;  
b) be free of cracks, injurious defects or fractures;  
c) not have excess distortion that will affect the further use of the chair; and  
d) not show any dimensional increase in any of the six leg -to-leg dimensions, dimension' X' or dimension 
'Y' greater than 5 %.   
© EAC 202 3 – All rights reserved  5 
 5 Marking  and labelling  
5.1 The plastic monobloc chair shall be legibly and indelibly marked  in English and/ or any other official 
language (French, Kiswahili, etc.) used in the importing East African Partner State with the following information : 
a) manufacturer's name or trade mark;  
b) code of resin identification and symbol for recycling in accordan ce with EAS 1086 ; and 
c) country of origin.  
5.2 The plastic monobloc chair shall be legibly and indelibly labelled in English and/or any other official 
language (French, Kiswahili, etc.)  used in the importing East African Partner State with the following info rmation : 
a) name and physical address of manufacturer;  
b) that the chair is not suitable for shower or bathroom use;  
c) name of the product as, “Plastic monobloc chair”;  
d) intended use of the chair, either domestic or commercial;  
e) for domestic chairs, the following s tatement, “Not for commercial use”;  
f) batch or code number ; and 
g) month and year of manufacture . 
6 Test report  
Test reports when requited, shall be reproduced in full, be provided on request and shall include the information 
listed in the 'Test Report' in Anne xes A to O.  
NOTE  Manufacturers making a statement of complianc e with this East African  Standard on a product, packaging, or 
promotional material related to that product are advised to ensure that such compliance is capable of being verified.   
6 © EAC 2023  – All rights reserved  
 Annex  A 
(norm ative)  
 
Chair inspection for damage and dimensional change  
A.1 Scope  
This annex sets out a method for determining the change in dimensions of the chair resulting from expo sure to 
the test methods below.  
A.2 Principle  
The chair is measured both before and a fter the completion of the test procedure in order to determine if any 
permanent dimensional changes have occurred that will affect the further use of the chair  
A.3 Apparatus  
A means of measuring in millimetres  
A.4 Initial inspection procedure  
A.4.1  Immediately before commencement of testing, inspect each chair thoroughly, also ensuring that the 
surfaces of the underside of the feet are free from foreign matter . 
A.4.2  Carry out a dimensional check of the unloaded chair in any situation where it can be expected to suffer 
deformation as a result of testing . 
A.4.3  Secord the leg spread dimensions, that is, the distance between the legs in six directions, front, back, 
two side and two diagonal dimensions at their lowest point, (see Figure A.1) . 
 
Figure  A.1 ─ Leg spread dimensions  
 
© EAC 202 3 – All rights reserved  7 
  
A.4.4  Record the arm spread assessment, that is, the distance in mm between the arms at the widest point 
dimension 'X' (see Figure A.2) . 
 
Figure A .2 ─ Arm spread assessment ─ Dimension 'X  
 
A.4.5  Record the distance in millimetres  between the top edge of the back of the chair and the front edge of 
the seat -dimension 'Y' (see Figure A.3).  
 
Figure A3 ─ Back deformation assessment — Dimension 'Y'  
A.5 Final inspection procedure  
A.5.1  Within 12 h to 24 h after completion of the tests, re-inspect the chair thoroughly . 
 
8 © EAC 2023  – All rights reserved  
 A.5.2  Note any apparent defects and determine any changes that have taken place since the initial inspection 
(refer to Clause 4 for defects that constitute a fail) . 
A.5.3  Record the distance between the legs in millimetres in six directions as in A.4 (c) . 
A.5.4  Record the distance in millimetres between the arms at the widest point -dimension 'X' as in A.4 (d) . 
A.5.5  Record the distance in millimetres between the top edge of the back of the chair and the front edge of 
the sea t-dimension 'Y' as in A.4 (e).  
A.6 Test report  
The following information shall be reported:  
a) whether the chair showed any defects at the time of the initial inspection;  
b) whether the chair showed any cracks, injurious defects or fractures at the time of final inspection;  
c) whether the chair showed any distortion that may affect the further use of the chair; and  
d) whether there was any leg spread, that is, if dimensional incre ase in the six leg -to-Ieg dimensions had 
increased by greater than 5 %  
e) whether there was any arm spread, that is, if dimension 'X' had increased by greater than 5 %;  
f) whether there was any back deformation, that is, if dimension 'Y' had increased by greate r than 5 %;  
g) relevant data to indicate the chair being tested;  
h) colour and mould number of the chair being tested;  
i) intended use as marked on the chair, domestic or commercial;  
j) level to which the chair was tested;  
k) details of any deviations from this test , including data relevant to the chair design if this test does not 
cater for it; and  
l) date of test.   
© EAC 202 3 – All rights reserved  9 
 Annex  B 
(Normative ) 
 
Determination of seat loading point (SLP) and back loading point (BLP)  
B.1 Scope  
This Annex sets out the method for determining the SLP and BLP.  
NOTE  There are no compliance requirements but these results should be necessary for the determination of static load 
test and fatigue load test.  
B.2 Principle  
The correct seat loading and back loading points are established using the loading point template.  
B.3 Apparatus  
B.3.1  20 kg mass  
B.3.2  Loading point template  (see Figures B .1 and B.2) comprising two shaped members fastened together 
by a pivot at one end. The contours of the shaped surfaces are devised so that they follow the form or shape of 
the chair under moderate loads. For this purpose the seat -loading arm shall have a total mass of 20 kg applied 
through the SLP. The apparatus is marked as shown in Figure B .2 so the template can be positioned easily with 
the two members at an angle of 90° to each other.  
 
Figure  B.1 ─ Position of chair loading point template  
 
10 © EAC 2023  – All rights reserved  
  
Key 
SLP Seat Loading Point  
BLP Back Loading P oint 
C Seat Loading Point for stools  
Figure B .2 ─ Chair loading point template  
B.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
B.5 Procedure  
B.5.1  Position the template with its load applied at the SLP on the centre -line of the seat as far towards th e 
rear of the seat as possible with the 20 kg mass in place . 
B.5.2  Adjust the te mplate position by pushing the back l oading portion into the back, so levering the seat 
portion forwards until the shape of the template correlates to that of the seat (see Fig ure B.1) . 
 
© EAC 202 3 – All rights reserved  11 
 B.5.3  Mark the required loading positions from the template.   
12 © EAC 2023  – All rights reserved  
 Annex  C 
(normative ) 
 
Seat static load test  
Since one position of the seat -loading pad in the seat static load test is the same for the back static load test, it 
is normally convenient to perform these two tests together as a combined seat and back static load test. In this 
case, the seat load should be applied first and then maintained while the back load is applied. The seat loading 
appa ratus should not hinder the rearward horizontal movement of the chair back when the back load is applied.  
C.1 Scope  
This Annex sets put a method for testing the integrity of a chair seat when subjected to a static load.  
NOTE  4.2.2  specifies the complian ce requirements.  
C.2 Principle  
A specified vertical force is applied to the seat of the chair to ensure the chair has sufficient  strength.  
C.3 Apparatus  
C.3.1  Seat loading pad in the form of a naturalistically shaped rigid indenter or equivalent device with a hard, 
smooth surface or an equivalent device  
NOTE  Because  of its complexity, the shape is made from an existing form rather than a drawing.  
C.3.2  Means of measuring and applying a force as set out in Table 1 . 
C.3.3  Means of measuring in millimetres .  
C.3.4  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard substrate surface.  
C.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
C.5 Procedure  
C.5.1  Position the seat loading pad to conform to the seat plane, firstly at the SLP determined by the chair 
loading point template . 
C.5.2  Apply the appropria te downward force (see Figure C .1) specified in Table 1, 10 times. During each 
application maintain the force for at least 10 s . 
C.5.3  Position the seat loading  at a point on the centre -line of the chair 100 mm inward from the front edge of 
the chair .  
© EAC 202 3 – All rights reserved  13 
 C.5.4  Apply the appropria te downward force (see Figure C .1), specified in Table 1, 10 times. During each 
application maintain the force for at least 10 s.  
 
Figure C.1  – Seat static load test  
C.6 Test report  
The following information shall be reported:  
a) whether the seat was broken or deforme d;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair, domestic or commercial; and  
e) the level to which the chair was tested.  
 
14 © EAC 2023  – All rights reserved  
 Annex  D 
(normative ) 
 
Back static load test with back deformation assessment  
D.1 Scope  
This annex sets out a method for testing the integrity of a chair back when subjected to a static load.  
NOTE  4.2.3  specifies the compliance requirements.  
D.2 Principle  
A specified force is applied at right angles to the back of the chair to test whether the chair back meets predefined 
strength requirements.  
D.3 Apparatus  
D.3.1  Back loading pad comprising a rigid rectangular object 200 mm high and 250 mm w ide, the face of 
which is curved across the width of the pad with a wide cylindrical curvature of 450 mm radius and with a 12 
mm radius on all front edges or equivalent device (see Figure D.1);  
 
Figure D.1 — Details of the back loading pad  
NOTE  If it is not possible to apply the back load at the back loading position due to the construction of the chair, e.g. if 
the back is constructed of cross -members positioned above or below or above and b elow the back -loading position, a 
suitable panel may be used to spread the load over the back cross -members as long as this surface does not overlap the 
side upright members.  
D.3.2  Means of measuring and applying a force as set out in Table 1 . 
 
© EAC 202 3 – All rights reserved  15 
 D.3.3  Means of measuring in millimetres . 
D.3.4  If required, a panel to sprea d the load over the back cross members . 
D.3.5  Stops, at a maximum of 40 mm high that prevent the chair from sliding but not tilting . 
D.3.6  Means of measuring the deflection of the back . 
D.3.7  Balancing load (see Table 1) . 
D.3.8  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard substrate surface.  
D.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 ºC ± 2 ºC.  
D.5 Procedure  
D.5.1  Measure di mension 'Y' prior to performing the test (see Figure A.3) . 
D.5.2  Position the centre of the back loading pad either at the BLP as specified by the chair loading point 
template (see Figure B.2) or at a position 100 mm below the top of the back, whichever is  the lower. Prevent 
the chair from moving rearwards by placing stops behind the rear feet (see Figure D.2) . 
 
Figure D.2 — Back static load test  
D.5.3  Apply the test load of the appropriate magnitude specified in Table 1 perpendicular to the back when 
under load . 
D.5.4  Apply the load 10 times, with the balancing seat load specified in Table 1 applied at the SLP (see Annex 
B). During each application, maintain the load for at least 10 s . 
D.5.5  The back static force shall be of the appropriate magnitude specified in Table 1. If the chair tends to 
overbalance at this force, the force applied to the seat shall be increased until this tendency ceases . 
D.5.6  On the tenth application of the back static  load, measure dimension 'Y' (see Figure A.3) . 
 
16 © EAC 2023  – All rights reserved  
 D.5.7  Calculate the back deformation by comparing the measurement of dimension 'Y' in (a) to that in (f).  
D.6 Test report  
The following information shall be reported:  
a) whether the back was visibly broken or d eformed;  
b) the back deformation assessment 'Y';  
c) relevant data to indicate the chair being tested;  
d) the colour and mould number of the chair being tested;  
e) the intended use as marked on the chair -domestic or commercial;  
f) the level to which the chair was tes ted;  
g) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
h) the date of test;  
i) the name, address and qualifications of the test facility; and  
j) the authority or qualification of the signat ory.   
© EAC 202 3 – All rights reserved  17 
 Annex  E 
(normative ) 
 
Arm sideways static load test  
E.1 Scope  
This annex sets out a method for testing the integrity of the chair arms to an outward horizontal force . 
E.2 Principle  
A specified horizont al force is applied to the arms to ensure they do not break or flex unduly under strain.  
E.3 Apparatus  
E.3.1  Two local loading pads, each one an object 100 mm in diameter, with a flat face and a 12 mm radius 
on the front edge or equivalent device . 
NOTE  All loading pads should be capable of pivoting in relation to the direction of the applied force.  
E.3.2  Means of measuring and applying a force as set out in Table 1 . 
E.3.3  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard s ubstrate surface.  
E.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
E.5 Procedure  
E.5.1  Using the local loading pads apply a pair of outward forces of t he appropriate magnitude specified in 
Table 1 between the arms of the chair at the point along the arms most likely to cause failure (see Figure E.1).   
18 © EAC 2023  – All rights reserved  
  
Figure E .1 — Arm sideways static load test  
E.5.2  Apply the forces 10 times, during each application and maintain the load for at least 10 s. If the chair 
has wings (that is, two side pieces at the top of an armchair against which the head may, be rested), repeat the 
test on both wings with the appropriate  force specified in Table 1.  
E.6 Test report  
The following information shall be reported:  
a) whether the chair arms were broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the inte nded use as marked on the chair either domestic or commercial;  
e) the level to which the chair was tested;  
f) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test;  
h) the name , address and qualifications of the test facility; and  
i) the authority or qualification of the signatory.  
 
© EAC 202 3 – All rights reserved  19 
 Annex  F 
(normative)  
 
Arm downwards static load test  
F.1 Scope  
This annex sets out a method for testing the integrity of the chair arms when subjected to a downward force.  
NOTE  4.2.5 specifies the compliance requirements.  
F.2 Principle  
A specified vertical force is applied to the arms of the chair to ensure they ha ve sufficient strength.  
F.3 Apparatus  
F.3.1  Loading pad in the form of a section of a cylinder with a radius of 300 mm, as shown in Figure F.1, 
applied in the test with the axis of rotation of the cylinder oriented transversely across the arms . 
 
Figure F1 – Arm downward loading pad  
F.3.2  Means of measuring and applying a force as set out in Table 1 . 
F.3.3  Stops at a maximum of 40 mm high to prevent the chair from sliding but not tilting . 
F.3.4  Floor surface of horizontal flat smooth polished stainless st eel sheet on a hard substrate surface.  
 
20 © EAC 2023  – All rights reserved  
 F.4 Test conditions  
Immediately, before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
F.5 Procedure  
F.5.1  Mark the points on the arms where the test load is to be applied and measure the height(s) of the 
point(s) above the seat surface . 
F.5.2  Using the loading pad , apply a vertical force of the appropriate magnitude specified in Table 1 at the 
point on the arms  most likely to cause failure (see Figure F.2) . 
 
Figure F.2 — Arm downward static load test  
F.5.3  Apply the force 10 times maintaining the load for a least 10 s each time . 
F.5.4  Measure the height of the arms above the seat surface while the load is appli ed on the first and tenth 
application of the load.  
F.6 Test report  
The following information shall be reported:  
a) whether the chair arms were broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair either domestic or commercial;  
e) the level to which the chair was tested;  
f) details of any deviations from this test, in cluding data relevant to the cha ir design if this test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
 
© EAC 202 3 – All rights reserved  21 
 i) the authority or  qualification of the signatory .  
22 © EAC 2023  – All rights reserved  
 Annex  G 
(normative)  
 
Seat fatigue tes t 
G.1 Scope  
This Annex sets out a method for testing the durability of the chair seat.  
NOTE1  4.2.6  specifies the compliance requirements.  
NOTE 2  Because  the number of cycles and the seat load are common to both the seat and back fatigue tests, these 
tests should be carried out simultaneously with the seat load being applied first and then maintained while the back load is 
applied. The seat loading apparatus should not hinder the rearward horizontal movement of the chair when the back load is 
applied.  
G.2 Principle  
A specified vertical force is repeatedly applied to the seat to test the durability of the chair.  
G.3 Apparatus  
G.3.1  Seat loading pad in the form of a naturalistically shaped rigid indenter with a hard smooth surface or an 
equivalent device (s ee Figure C.1) . 
G.3.2  Means of measuring and applying the force specified in Table 1 . 
G.3.3  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard substrate surface.  
G.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
G.5 Procedure  
G.5.1  Apply the force by means of the seat loading pad with the centre of the pad positioned at the SLP 
determined as per Annex B . 
G.5.2  Apply for the numb er of times specified in Table 1 at a rate not exceeding 40 cycles per min (see Figure 
G.1).   
© EAC 202 3 – All rights reserved  23 
  
Figure G.1 — Seat fatigue test  
G.6 Test report  
The following information shall be reported:  
a) whether the seat of the chair was broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair, domestic or commercial;  
e) the level to which the chair was tested;  
f) details of any deviations from this test,  including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
i) the authority or qualification of the signatory . 
 
24 © EAC 2023  – All rights reserved  
 Annex  H 
(normative)  
 
Back fatigue test  
H.1 Scope  
This annex sets out a method for testing durability of the chair back.  
H.2 Principle  
A specified horizontal force is applied to the chair to ensure it does not deform.  
H.3 Apparatus  
H.3.1  Back l oading pad comprising a rigid rectangular object 200 mm high and 250 mm wide, the face of 
which is curved across the width of the pad with a convex cylindrical curvature of 450 mm radius and with a 12 
mm radius on all front edges or equivalent device (see Figure D.1) . 
NOTE  If it is not possible to apply the back load at the loading position due to the construction of chair, for example, if 
the back is constructed of cross -members positioned above, below, or above and below the back loading position, a suita ble 
panel may be used to spread the load over the back cross -members as long as this surface does not overlap the side upright 
members.  
H.3.2  Means of measuring in millimetres . 
H.3.3  Stops, at a maximum of 40 mm high to prevent the chair from sliding but not tilting . 
H.3.4  Means of measuring and applying the force as set out in Table 1 . 
H.3.5  If required, a panel to spread the load over the back cross members . 
H.3.6  Balancing load as in Table 1 . 
H.3.7  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard substrate surface.  
H.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
H.5 Procedure  
H.5.1  Apply the force by means of the back loading pad with the centre of the pad positioned at the BLP 
determined as per Annex B or at a point 100 mm below the top of the back whichever is the lower . 
When this test is applied to a chair with a v ery low back, apply the backward force horizontally to the front edge 
of the seat .  
© EAC 202 3 – All rights reserved  25 
 H.5.2  Prevent the chair from moving rearward by placing stops behind the rear feet (See Figure H.1) . 
 
Figure H.1 — Back fatigue test  
H.5.3  Apply the force for the number of  times specified in Table 1 with the balancing load specified applied at 
the SLP. If conducting the seat fatigue test at the same time, then during each cycle apply the force to the seat 
(see Figure H.1).  
H.6 Test report  
The following information shall be reported:  
a) whether the back of the chair was broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair, domestic or commercial;  
e) the level to whic h the chair was tested;  
f) details of any deviations from this test; including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test; and  
h) the name, address and qualifications of the test facility.  
 
26 © EAC 2023  – All rights reserved  
 Annex   I 
(normative ) 
 
Leg forward static load test  
I.1 Scope  
This annex sets out a method of testing the integrity of the legs of a chair.  
NOTE  4.2.8  specifies the compliance requirements.  
I.2 Principle  
A load is applied  to the chair whilst the chair is tilted in order to test the integrity of the front legs of the chair.  
I.3 Apparatus  
I.3.1 A force of either 1250 N or 1 800 N  
I.3.2 A 300 mm diameter (timber/medium density fibreboard/particle board) disc  to spread the load 
over the seat surface  
I.3.3 Stops , at a maximum of 40 mm high to prevent the chair from sliding but not tilting  
I.3.4 Means of measuring  in millimetres  
I.3.5 Floor surface of flat smooth, polished stainless steel sheet on a hard substra te surface  
I.3.6 Inclinable test platform  
I.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
I.5 Procedure  
I.5.1 Restrain the front feet of the chair fro m movement with stops . 
I.5.2  Incline the test bed until the chair reaches equilibrium and is just about to overturn . 
I.5.3 Apply the specified load to the, chair at a point 150 mm from the front edge of the seat through the 300 
mm disc. Hold this load for  10 s. Repeat a total of 10 times (see Figure I.1) .  
© EAC 202 3 – All rights reserved  27 
  
Figure I.1 – Leg forward static load test  
NOTE  It may be necessary to drill holes in some chairs  150 mm from front edge.  
I.6 Test report  
The following information shall be reported:  
a) whether the chair supported the load, that is, whether the front legs of the chair gave way, or were 
broken or deformed;  
b) whether the chair was damaged;  
c) relevant data to indicate the chair being tested;  
d) the colour and mould number of the chair being test ed;  
e) the intended use as marked on the chair, domestic or commercial;  
f) the level to which the chair was tested;  
g) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
h) the date of test;  
i) he name, address and qualifications of the test facility; and  
j) the authority or qualification of the signatory.  
 
28 © EAC 2023  – All rights reserved  
 Annex   J 
(normative)  
 
Leg rearward static load test  
J.1 Scope  
This annex sets out a method for testing the integrity of chairs legs.  
NOTE  4.2.9 specifies the compliance requirements.  
J.2 Principle  
A load is applied to a chair whilst the chair is tilted, in order to test the integrity of its rear legs.  
J.3 Apparatu s  
J.3.1  A force  of either 1250 N or 1 800 N  
J.3.2  A 300 mm diameter (timber/medium density fibreboard/particle board) disc  to spread the load 
over the seat surface  
J.3.3  Stops  at a maximum of 40 mm high to prevent the chair from sliding but not tilting  
J.3.4 Means  of measuring in millimetres  
J.3.5  Floor surface  of flat smooth polished stainless steel sheet on a hard substrate surface  
J.3.6  Inclinable test platform  
J.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
J.5 Procedure  
J.5.1  Restrain the rear feet of the chair from movement with stops . 
J.5.2  Incline the test bed until the chair reaches equilibrium and is just about to overturn . 
J.5.3  Apply the specified load to the chair at the seat loading point through the 300 mm disc. Hold this load 
for 10 s. Repeat a total of 10 times (see Figure J.1).   
© EAC 202 3 – All rights reserved  29 
  
Figure J.1 – Leg rearward static  load test  
NOTE  It may be necessary to drill holes in some chairs at the seat loading poin t. 
J.6 Test report  
The following information shall be reported:  
a) whether the chair supported the load, that is, whether the rear legs of the chair gave way;  
b) whether  the chair was damaged;  
c) relevant data to indicate the chair being tested;  
d) the colour and mould number of the chair being tested;  
e) the intended use as marked on the chair, domestic or commercial;  
f) the level to which the chair was tested;  
g) details of any d eviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
h) the date of test;  
i) the name, address and qualifications of the test facility; and  
j) the authority or qualification of the signatory.  
 
30 © EAC 2023  – All rights reserved  
 Annex   K 
(normati ve) 
 
Leg sideways static load test  
K.1 Scope  
This annex sets out a method for testing the integrity of the chair legs.  
NOTE  4.2.10  specifies the compliance requirements.  
K.2 Principle  
A load is applied  to the chair whilst the chair tilted, in order to test the integrity of the legs.  
K.3 Apparatus  
K.3.1  Force  of either 1250 N or 1 800 N  
K.3.2  300 mm diameter (timber/medium density fibreboard/particle board) disc  to spread the load over 
the seat surface  
K.3.3  Stops  at a maximum of 40 mm high to prevent the chair from sliding but not tilting  
K.3.4  Means of measuring in millimetres  
K.3.5  Floor surface  of flat smooth polished stainless steel sheet on a hard substrate surface  
K.3.6  Inclinable test platform  
K.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
K.5 Procedure  
K.5.1  Restrain two side feet of the chair from movement with stops.  
K.5.2  Incline the tes t bed until a point midway between the base of the unrestrained feet is 150 mm above 
the height of the restrained feet . 
K.5.3  Apply the specified load to the chair at the seat loading point through the 300 mm disc. Hold this load 
for 10 s. Repeat a total o f 10 times (see Figure K.1).   
© EAC 202 3 – All rights reserved  31 
  
Figure K.1 – Leg sideways static load test  
NOTE  It may be necessary to drill holes in some chairs at the seat loading point.  
K.6 Test report  
The following information shall be reported:  
a) whether the chair supported the load ; i.e. whether the two legs supporting the chair gave way;  
b) whether the chair was damaged;  
c) relevant data to indicate the chair being tested;  
d) the colour and mould number of the chair being tested;  
e) the intended use as marked on the chair, domestic or commercial;  
f) the level to which the chair was tested;  
g) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
h) the date of test;  
i) the na me, address and qualifications of the test facility; and  
j) the authority or qualification of the signatory.  
 
32 © EAC 2023  – All rights reserved  
 Annex   L 
(normative ) 
 
Seat impact test  
L.1 Scope  
This annex sets out a method for testing the inte grity of the chair seat when subjected to downward impacts.  
NOTE  4.2.11  specifies the compliance requirements.  
L.2 Principle  
An impacter is dropped freely from a specified height to determine if the chair can withstand  the force.  
L.3 Apparatus  
L.3.1  Foam for facing loading pads, consisting of a 25 mm thick layer of polyether foam with a hardness index 
whet measured according to ISO 2439, Method A, of 135/660 N and a density of 27 kg/m3 to 30 kg/m3. 
Alternatively, a layer of this foam may be positioned between the loading pad and the test structure . 
L.3.2  Seat impacter (see Figure L.1) comprising the following:  
 
Figure L.1 – Seat -impacter  
 
a) circular body of approximately 200 mm in diameter separated from the striking surface by helical 
compression sprin gs and free to move relative to it, on a line perpendicular, to the plane of the central 
area of the striking surface.  
The body and associated parts minus the springs have a mass of 17 kg ± 0.1 kg and the whole apparatus, 
including mass, springs and strik ing surface, has a mass of 25 kg ± 0.1 kg.  . 
 
© EAC 202 3 – All rights reserved  33 
 b) springs with a combined spring system that has a nominal spring rate of 0.69 kg/mm ± 0.1 kg/mm and 
total friction resistance of the moving parts between 0.025 kg and 0.045 kg;  
The spring system is compressed to  an initial load of 104 kg ± 0.5 kg (measured statically) and the amount of 
spring compression movement available from the initial compression point to the point where the springs 
become fully closed is not less than 60 mm.  
c) striking surface of an approximately flat leather pad containing fine dry sand;  
NOTE  No equivalent device can be used.  
L.3.3  Means of measuring in millimetres; and  
L.3.4  Floor surface of horizontal flat smooth polished stainless steel sheet on a hard su bstrate surface.  
L.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere.  
L.5 Procedure  
L.5.1  Place the piece of foam on the seat if required . 
L.5.2  Allow the seat impacter (see Figure L 1) to  fall freely from the appropriate height specified in Table 1 
onto the SLP as specified by the chair loading point template (see Annex B and Figure L.2). Repeat this test 10 
times . 
 
Figure L.2 – Seat impact test  
L.5.3  Repeat the test at a point on the cen tre-line of the chair 100 mm inwards from the front edge of the 
chair. Repeat this test 10 times.  
 
34 © EAC 2023  – All rights reserved  
 L.6 Test report  
The following information shall be reported:  
a) whether the seat was broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair - domestic or commercial;  
e) the level to which the chair was tested;  
f) details of any deviations from this test, including data relevant to the chair design if thi s test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
i) the authority or qualification of the signatory.   
© EAC 202 3 – All rights reserved  35 
 Annex   M 
(normative)  
 
Drop test  
M.1 Scope  
This annex sets out a method to test the structural integrity of a chair when dropped.  
NOTE  4.2.12  specifies the compliance requirements.  
M.2 Principle  
The chair is lifted and dropped from a specified height onto one leg to determine the ability of the  chair to resist 
damage.  
M.3 Apparatus  
M.3.1  Means of measuring the angle 10°  
M.3.2  Means of supporting the chair at 10° to horizontal  
M.3.3  Means of measuring the height of the drop in millimetres  
NOTE  Using cords is one way of suspending the chair  
M.3.4 Floor surface of horizontal flat smooth polished stainless steel sheet  on a hard substrate surface  
M.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
M.5 Procedure  
M.5.1  Support the chair so that, at impact on one foot, the line joining that foot to the foot diagonally opposite 
is inclined at 10° to the horizontal, whilst the line joining the remaining feet is horizontal . 
M.5.2  Lift up the chair to the a ppropriate height specified in Table 1 above the test floor . 
M.5.3  Drop the chair 10 times onto a front leg, and 10 times onto a rear leg (see Figure M.1).   
36 © EAC 2023  – All rights reserved  
  
Figure M.1 – Drop test  
 
NOTE  This test may be carried out  by lifting the chair by three cords that are adjusted in length with the chair standing 
in the correct orientation on a plane inclined at 10º to the horizontal . 
M.6 Test report  
The following information shall be reported:  
a) whether the chair was broken or deformed;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use as marked on the chair, domestic or commercial;  
e) the level to which the chair was tested;   
f) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
i) the authority or qualification of the signatory.  
 
© EAC 202 3 – All rights reserved  37 
 Annex   N 
(normative ) 
 
Rearward overturning  
N.1 Scope  
This Annex sets out a method for testing the stability of the chair when a horizontal force is applied.  
NOTE  4.3.2.1 specifies the compliance requireme nts.  
N.2 Principle  
A specified test load is applied to the seat of the chair and an overturning force is applied to the back of the 
chair to determine the chair's resistance to overturning.  
N.3 Apparatus  
N.3.1  Stops , at a maximum of 40 turn high to pre vent the chair from sliding but not overturning  
N.3.2  Means of applying a force of 600 N  
N.3.3  Strap to keep weight in position  
N.3.4  Means of measuring and applying a force  as specified in Table 1  
N.3.5  Floor surface of horizontal flat smooth polished st ainless steel sheet  on a hard substrate surface  
N.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
N.5 Procedure  
N.5.1  Position the chair on a horizontal  surface . 
N.5.2  Apply the force by means of the small seat loading pad on the centreline of the seat loading point . 
N.5.3  Restrain the rear legs with stops . 
N.5.4  Apply the force on the back as shown in Figure N.1.   
38 © EAC 2023  – All rights reserved  
  
Figure N.1 — Rear stability test  
N.6 Test report  
The following information shall be reported:  
a) whether the chair overturned;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being tested;  
d) the intended use is marked on the chair, domestic or commercia l;  
e) the level to which the chair was tested;  
f) details of any deviation from this test, including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
i) the a uthority or qualification of the signatory.  
 
© EAC 202 3 – All rights reserved  39 
 Annex   O 
(normative ) 
 
Front ward overturning  
O.1 Scope  
This annex sets out a method for testing the stability of the chair when a vertical force is applied.  
NOTE  4.3.2.2 specifies the compliance requirements.  
O.2 Principle  
A specified load is applied at a specified angle to determine the resistance to overturning by the chair.  
O.3 Apparatus  
O.3.1  Means of measuring an angle of 45°  
O.3.2  Stops , a maximum of 40 mm high that prevent the chair from sliding but not overturning  
O.3.3  Load equivalent to 40 % of the weight of the chair  
O.3.4  Strap not exceeding 75 min in width, to keep the load in position  
O.3.5  Floor surface  of horizontal flat smooth polished stainles s steel sheet on a hard substrate surface  
O.4 Test conditions  
Immediately before testing, the chair shall stand for at least 24 h in a standardized atmosphere at a temperature 
of 23 °C ± 2 °C.  
O.5 Procedure  
O.5.1  Calculate and record 40 % of the weight o f the chair . 
O.5.2  Restrain the front legs of the chair with the stops . 
O.5.3  Apply a downwards load at 45° (0.785 radian) to the floor by attaching the strap over the front portion 
of the seat (as shown in Figure O.1) .  
40 © EAC 2023  – All rights reserved  
  
Figure O.1 ─ Front stability test  
O.5.4  Apply the load equal to 40 % of the weight of the chair . 
O.6 Test report  
The following information shall be reported:  
a) whether the chair overturned;  
b) relevant data to indicate the chair being tested;  
c) the colour and mould number of the chair being t ested;  
d) the intended use as marked on the chair, domestic or commercial;  
e) the level to which the chair was tested;  
f) details of any deviations from this test, including data relevant to the chair design if this test does not 
cater for it;  
g) the date of test;  
h) the name, address and qualifications of the test facility; and  
i) the authority or qualification of the signatory.  
 
© EAC 202 3 – All rights reserved  41 
 Bibliography  
[1] KS 1821: 2005 , Plastic monobloc chairs — Specification  
[2] TZS 1232:  2010, Plastic monobloc  chairs – Specification  
[3] US 634 : 2006 , Specification for plastic monobloc chairs  
 DEAS 1150: 2023  
© EA C 2023  – All rights reserved  
  
  