DRAFT UGANDA STANDARD  
  DUS 2269 :202 2  
First Edition  
2022 -02-12 
 
 
 Reference number  
DUS 2269 :202 2 
© UNBS2022   
  
Composites made from cellulose -based materials and 
thermoplastics (usually called wood -polymer composites 
(WPC) or natural fibre composites (NFC))   Specifications for 
decking profiles and tiles   
 DUS 2269 :202 2 
ii © UNBS 2022  – All rights  reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS  2019   
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permission from UNBS.  
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The Executive  Director  
Uganda National Bureau of Standards  
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Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2269 :202 2 
© UNBS 2019  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ .............................  v 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative References ................................ ................................ ................................ ...........................  1 
3 Terms and Definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.2 Material  ................................ ................................ ................................ ................................ ...................  2 
4.3 Appearance  ................................ ................................ ................................ ................................ ............  2 
4.4 Physical characteristics  ................................ ................................ ................................ .......................  3 
4.5 Mechanical characteristics  ................................ ................................ ................................ ...................  3 
4.5.1  Falling mass impa ct resistance  ................................ ................................ ................................ ...........  3 
4.5.2  Flexural properties  ................................ ................................ ................................ ................................  4 
4.5.3  Creep behaviour  ................................ ................................ ................................ ................................ .... 4 
4.5.4  Durability of products against biological agents  ................................ ................................ ...............  5 
4.5.5  Durability of the products against ageing and moisture  ................................ ................................ ... 5 
4.5.6  Thermal properties  ................................ ................................ ................................ ................................  6 
4.5.7  Additional characteristics  ................................ ................................ ................................ ....................  6 
5 Marking  ................................ ................................ ................................ ................................ ...................  8 
Annex A  ................................ ................................ ................................ ................................ ...............................  9 
Annex B  ................................ ................................ ................................ ................................ .............................  10 
B.1 Principle  ................................ ................................ ................................ ................................ ...............  10 
B.2 Testing person  ................................ ................................ ................................ ................................ ..... 10 
B.3 Test rig  ................................ ................................ ................................ ................................ ..................  10 
B.4 Test liquid  ................................ ................................ ................................ ................................ .............  10 
B.5 Test specimen  ................................ ................................ ................................ ................................ ...... 10 
B.6 Test method  ................................ ................................ ................................ ................................ .........  10 
B.7 Evaluation  ................................ ................................ ................................ ................................ ............  11 
B.8 Test report  ................................ ................................ ................................ ................................ ............  11 
Annex C  ................................ ................................ ................................ ................................ .............................  12 
C.1 Apparatus  ................................ ................................ ................................ ................................ .............  12 
C.2 Test specimens  ................................ ................................ ................................ ................................ .... 12 
C.3 Procedure  ................................ ................................ ................................ ................................ .............  12 
C.4 Calculation and expression of results  ................................ ................................ ..............................  12 
Annex D  ................................ ................................ ................................ ................................ .............................  13 
D.1 Thickness, width and length (applicable to  profiles, only)  ................................ .............................  13 
D.2 Deviation from straightness (applicable to profiles, only)  ................................ ..............................  13 
Annex E  ................................ ................................ ................................ ................................ .............................  15 
E.1 Decking profiles and tiles  ................................ ................................ ................................ ...................  15 
E.1.1  Principle  ................................ ................................ ................................ ................................ ...............  15 
E.1.2  Test method and test parameters  ................................ ................................ ................................ ...... 15 
E.1.3  Test specimens  ................................ ................................ ................................ ................................ .... 15 
E.1.4  Conditioning  ................................ ................................ ................................ ................................ ........  15 
E.1.5  Procedure  ................................ ................................ ................................ ................................ .............  15 
E.1.6  Profile cladding  ................................ ................................ ................................ ................................ .... 16 
E.2. Non-cellular material profiles  ................................ ................................ ................................ .............  16 
E.2.1  Principle  ................................ ................................ ................................ ................................ ...............  16 
E.2.2.  Apparatus  ................................ ................................ ................................ ................................ .............  16 
E.2.3  Test specimens  ................................ ................................ ................................ ................................ .... 17 DUS 2269 :202 2 
iv © UNBS 2022  – All rights  reserved  
 E.2. 4  Conditioning  ................................ ................................ ................................ ................................ ........  17 
E.2. 5  Procedure  ................................ ................................ ................................ ................................ ............  17 
E.2.6  Cellular material profiles  ................................ ................................ ................................ ....................  17 
Annex F  ................................ ................................ ................................ ................................ .............................  19 
F.1 Principle  ................................ ................................ ................................ ................................ ...............  19 
F.2 Apparatus  ................................ ................................ ................................ ................................ ............  19 
F.2.1  Testing apparatus (Figure F.1), h aving the following essential components:  .............................  19 
F.2.2  Measuring instruments  ................................ ................................ ................................ ......................  19 
F.3 Test specimens  ................................ ................................ ................................ ................................ ... 20 
F.4 Atmosphere for conditioning and testing  ................................ ................................ ........................  20 
F.5 Proce dure  ................................ ................................ ................................ ................................ ............  21 
F.6.2  Bending strength  ................................ ................................ ................................ ................................  23 
F.7 Test report  ................................ ................................ ................................ ................................ ...........  25 
Annex G  ................................ ................................ ................................ ................................ ............................  26 
G.1 Known span in use  ................................ ................................ ................................ .............................  26 
G.1.1  Principle  ................................ ................................ ................................ ................................ ...............  26 
Annex H  ................................ ................................ ................................ ................................ ............................  29 
H.1 Resistance to artificial weathering ................................ ................................ ................................ .... 29 
H.1.1  Test methods for artificial weathering  ................................ ................................ ..............................  29 
H.1.2  Methods for assessing of th e resistance to artificial weathering  ................................ ..................  29 
H.1.3  Determination of colorimetric coordinates  ................................ ................................ ......................  29 
H.2 Moisture resistance  ................................ ................................ ................................ ............................  30 
H.2.1  Swelling and water absorption  ................................ ................................ ................................ ..........  30 
H.2.2  Moisture re sistance under cyclic conditions  ................................ ................................ ...................  31 
H.2.3  Moisture resistance – Boiling test  ................................ ................................ ................................ .... 32 
H.3 Resistance to natural ageing (external use)  ................................ ................................ ....................  32 
H.3.1  Test methods for natural ageing  ................................ ................................ ................................ ....... 32 
H.3.2  Methods for assessing the resistance to natural ageing  ................................ ...............................  33 
 DUS 2269 :202 2 
© UNBS 2019  – All rights reserved  v 
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the ela boration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organis ation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consu mer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC20, timber and timber 
products ],   DUS 2269 :202 2 
vi © UNBS 2022  – All rights  reserved  
  
 DRAFT UGANDA STANDARD  DUS 2269 : 2022 
 
© UNBS 2022  – All rights reserved  1 
 Composites made from cellulose -based materials an d thermoplastics (usually called 
wood -polymer composites (WPC) or n atural fibre composites (NFC))  
Specifications for decking profiles and tiles   
1 Scope   
This Draft Standard specifies the characteristics of decking profiles and tiles made from cellulose -based 
materials and thermoplastics, usually called wood -polymer composites (WPC) or natural fibre composites 
(NFC), for external use.  
This standard  is applicable to extruded profiles but also to tiles manufactured by other plastics processing 
techniques, e .g. injection moulding.  
It is not applicable to kits (i.e. support rail profiles, cover strip profiles and hardware) which are out of th e 
scope of this standard . 
NOTE  For editorial reasons, the abbreviation “WPC” is used for “composites made from cellulo se-based 
materials and thermoplastics”.  
2 Normative R eferences   
The following documents, in whole or in part, are normatively referenced in this document and are 
indispensable for its application. For dated references, only the edition cited applies. For u ndated references, 
the latest edition of the referenced document (including any amendments) applies.  
ISO 4892 -3, Plastics — Methods of exposure to laboratory light sources — part 3: fluorescent UV  lamps  
ISO 16474 -3, paints and varnishes — methods of exposure to laboratory light sources — part 3: fluorescent  
UV lamps  
ISO 10640, Plastics — Methodology for assessing polymer photoageing by FTIR and UV/visible spectroscopy  
ISO 10640 , Plastics — Methodology for assessing polymer p hotoageing by FTIR and UV/visible spectroscopy  
ISO 4892 -2, Plastics — Methods of exposure to laboratory light sour ces — Part 2: Xenon -arc lamps   
ISO 16987 , Wood -based panels — Determination of moisture resistance under cyclic test conditions  
ISO 16983 , Wood -based panels — Determination of swelling in thickness after immersion in water  
3 Terms and D efinitions   
For the purposes of this document, the terms and definitions given below  apply   
3.1 
wood-polymer composite WPC   
or  
natural fibre composite NFC   
material or product made thereof being the result of the combination of one or several cellulose -based 
material(s) with one or several thermoplastics, intended to be or being processed through plas tic processing 
techniques   DUS 2269 :2022 
2 © UNBS 2022  – All rights reser ved 
 3.2  
compound  
clearly defined homogenized mixture of a base polymer and cellulose -based material with additives, i.e. 
pigments, stabilisers and others, at a dosage level necessary for the processing and the intended use of the 
final product   
3.3  
cellular material  
material the density of which is reduced by creating numerous small cavities (cells), during the processing, 
interconnecting or not, dispersed throughout the mass   
3.4  
Batch  
clearly identified collection of units, manu factured consecutively or continuously under the same conditions, 
using material or compound conforming to the same specification   
Note 1 to entry: The production batch is defined and identified by the unit manufacturer: e.g. the change of the raw 
material  preparation, the hot -cool-mixing, the shift in extruding process or the production line are considered as a new 
production batch   
4 Requirements  
4.1 General  
Initial type testing shall be performed to demonstrate compliance with the requirements specified in Clause 4 
of this standard . The tests according to 4.5.7 shall be carried out if the performance is declared by the 
manufacturer. Initial type testing shall be repeated, whenever a change occurs in the composition of the 
product, its geometry or in the p roduction process. In case of a minor change, only the properties which could 
be influenced by this change shall be tested.  
NOTE  Minimum frequencies of testing for factory production control purposes are given in Annex A .  
4.2 Material  
The base polymer, fr om which the material is produced, and the type and content of cellulose -based material 
shall be declared by the manufacturer.  
Reprocessable and/or recyclable materials may be used for manufacturing profiles and tiles provided that they 
satisfy to the pro visions of this standard . 
WPC materials are recyclable materials which can be treated in a material recovery process intended to save 
resources while minimizing harmful emissions into air, water and soil as well as their impacts on human 
health.  
4.3 Appeara nce 
For production control purposes, the manufacturer shall compare three samples drawn at random from the 
same profile/tile prod uction batch with a control sample,  under  the illumination conditions . The surfaces of the 
specimens shall be illuminated by a source that complies with the CIE standard i lluminant D65  with an 
illumination of at least 600 lx. The light is incident upon the surfaces at an angle of approximately 45°, and the 
direction of viewing is approximately along the perpendicular to the plane of the surfaces .  
The control samples shall be stored in a dark room and renewed every six months. If a control sample is put in 
contact with water, it shall be renewed immediately.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  3 
 4.4 Physical characteristics  
When tested in accordance with the test metho ds as specified in Table 1, using the parameters indicated, the 
profiles/tiles, as delivered to the customer, shall have characteristics conforming to the requirements given in 
Table 1  
Table 1 — Physical characteristics  
Characteristic  Requirements  Test met hod Number of test specimens  
Slipperiness a  
a) Pendulum test  Pendulum value ≥ 36  ISO 13061 -10  5 specimens/face/direction b  
OR 
b) Inclination plan test  Class C (≥24°)  Annex B  1 specimen/face/direction b  
OR 
c) Dynamic coefficient 
of friction (dry condition)  ≥ 0.43  ISO 21182   1 specimen/face/direction b  
Linear  mass 
(applicable to profiles)  Individual values ≥ 95 % declared 
value by the manufacturer.  
The linear mass and tolerances 
shall be declared by the 
manufacturer.  Annex C  3 specimens  
Thickness, width and 
length (applicable to 
profiles)  The relevant dimensiona l values 
and their tolerances shall be 
declared by the manufacturer  Annex D   3 specimens  
Deviation  from 
straightness (applicable 
to profiles)  The deviation of straightness and 
its tolerance shall be declared by 
the manufacturer  Annex D   3 specimens  
Cuppi ng The cupping value and its 
tolerance shall be declared by the 
manufacturer  Annex D   3 specimens  
a The choice of the method for assessing the slipperiness is under the responsibility of the manufacturer taking into 
account the relevant national regulations  according to the field of use of the profiles/tiles, if existing. The method used for 
assessing the slipperiness shall be declared by the  manufacturer.  
cb In both directions and on both faces of the profile/tile, if relevant  
 
4.5 Mechanical characteristi cs 
4.5.1  Falling mass impact resistance  
When tested in accordance with the test methods as specified in Table 2, using the parameters indicated, the 
profiles/tiles, as delivered to the customer, shall have characteristic conforming to the requirements give n in 
Table 2  DUS 2269 :2022 
4 © UNBS 2022  – All rights reser ved 
 Table 2 — Falling mass impact resistance  
Requirements  Test parameters  Test method  Number of test 
specimens  
Hollow profiles  
None of 10 test specimens shall show a 
failure with a crack length ≥ 10 mm or a 
depth of residual indentation ≥ 0. 5 mm . H: (700 ± 5)  mm 
Ms: (1 000 ± 5)  g Annex E  10 specimens/facea 
In case of one failure, 10 additional test 
specimens shall be tested and no failure 
with a crack length ≥ 10 mm or a de pth of 
residual indentation ≥ 0. 5 mm shall occur.     
Solid profiles  
None of 10 test specimens shall sh ow a 
failure with a depth of residual indentation 
≥ 0.5 mm. H: (700 ± 5)  mm 
Ms: (1 000 ± 5)  g Annex E  10 specimens/facea 
In case of one failure, 10 additional test 
specimens shall b e tested and no failure 
with a depth of residual  indentation ≥ 0,5 
mm shall  occur.     
a On both faces of the profile/tile, if relevant.    
 
4.5.2  Flexural properties  
When tested in accordance with the test methods as specified in Table 3, using the parameters indicated, the 
profiles/tiles, as del ivered to the customer, shall have characteristics conforming to the requirements given in 
Table 3.  
Table 3 — Flexural properties  
Requirements  Test parameters  Test method  Number of test 
specimens  
- F'max ≥ 3 300 N (arithmetic mean  value)  
- F'max ≥ 3 000 N (in dividual  values)  Span in use 
declared by the 
manufacturer  Annex F 8 
specimens/facea 
 
- Deflection under a load of 500 N ≤ 2.0 mm 
(arithmetic mean value)     
- Deflection under a load of 500 N ≤ 2.5 mm 
(individual values)     
a On both faces of the pro file/tile, if relevant.     
 
The conformity to the requirements given in Table 3 may be verified by calculation using the modulus of 
elasticity in bending and the bending strength of the profile. The value to be considered for these calculation 
shall be 5t h percentile value.  
4.5.3  Creep behaviour  
When tested in accordance with the test methods as specified in Table 4, using the parameters indicated, the 
profiles/tiles, as delivered to the customer, shall have characteristics conforming to the requirements g iven in 
Table 4  DUS 2269:2022  
© UNBS 2022  – All rights reserved  5 
 Table 4 — Creep behaviour  
Requirements  Test parameters  Test method  Number of test specimens  
Known span in use  
 
ΔS ≤ 10 mm for arithmetic mean value  
ΔS ≤ 13 mm for individual values  
ΔSr ≤ 5 mm for arithmetic mean value   
Span in use 
declare d by the 
manufacturer   
 
Annex G  3 specimens mounted to the 
test apparatus in the same 
way as for the bending test 
according to 4.5.2 giving the 
lower mean value for the 
maximum force a 
Unknown span in use  
 
Cf ≤ 6 and CV (coefficient of 
variation) ≤ 15  % 
Erc ≥ 30 % and CV (coefficient of 
variation) ≤ 15  %  
 
-  
 
Annex G  3 specimens mounted to the 
test apparatus in the same 
way as for the bending test 
according to 4.5.2 giving the 
lower mean value for the 
maximum force a 
a On both faces of the profile/tile,  if relevant.  
 
4.5.4  Durability of products against biological agents  
For the purpose of this standard , use classes according to the environmental conditions are defined in Table 
5. 
Table 5 — Use class and occurrence of biological agents  
Use class a Servi ce situation  Biological agents  
3 External use, above ground  Basidiomycetes  
4 External use, in ground contact  Soft rotting micro -fungi  
 
a A product may be classified in use class 3 or 4 or  both.  
 
If products of different geometries are made from the sa me material, only one product shall be tested.  
4.5.5  Durability of the products against ageing and moisture  
When tested in accordance with the test methods as specified in Table 7, using the parameters indicated, the 
products, as delivered to the customer , shall have characteristics conforming to the requirements given in 
Table 7  
 
 
Table 7 — Durability of the products against ageing and moisture  
Properties  Requirements  Test parameters  Test method  Number of test 
specimens  
Resistance  to 
artificial  weatheri ng - ΔL*, Δa*, Δb* shall 
be declared  300 h  
2016 h  Annex H  1 specimen/colour  
(5 measurements  
/specimen)  
  750 h    DUS 2269 :2022 
6 © UNBS 2022  – All rights reser ved 
 Depending on the test method, the same material can lead to different ΔL, Δa, Δb values  
Moisture resistance  
under cyclic test 
conditions  - Mean of decrease 
of bending strength ≤ 
20 % 
- Individual 
decrease of bending 
strength ≤ 30  %  
 
 
 
- Annex H  8 specimens 
mounted to the test 
apparatus in the 
same way as for the 
bending test 
according to 4.5.2 
giving the lower 
mean value for the 
maximum force a 
Swelling and water 
absorption (use 
class 3 or 4)  1) Means welling:  
≤ 4 % in thickness  
≤ 0.8 % in width  
≤ 0.4 % in length  
2) Individual swelling:  
≤ 5 % in thickness  
≤ 1.2 % in width  
≤ 0.6 % in length  
3) Mean  water 
absorption ≤ 7 % in  
weight  
4) Individual  
water absor ption ≤ 9 
% in weight   Annex H  5 specimens  
  
 
-   
Boiling test (for 
production  control  
purpose only)  1) Mean value of 
water absorption ≤ 7 
% in weight  
2) Individual values 
of water absorption ≤ 
9 % in weight   
 
- Annex H  5 specimens  
a On both faces of the pro file/tile, if  relevant.  
 
4.5.6  Thermal properties  
The coefficient of linear thermal expansion of compounds shall be determined according to ISO 11359 -2 using 
a temperature range for the measurements of −20 °C to 80 °C . When tested in accordance with the t est 
methods as specified in Table 8, the materials shall have characteristics conforming to the requirements given 
in Table 8.  
Table 8 — Thermal properties   
Properties  Requirement  Test method  Number of test 
specimens  
Linear thermal expansion coefficient  ≤ 50⋅10−6 K−1 ISO 11359 -2 3 specimens  
 
4.5.7  Additional characteristics  
Additional characteristic(s) to those given in Tables 1 to 8, listed in Table 9 and 10, shall be assessed when 
required by the customer, a third party or to comply with regulations. Th e corresponding test result(s) and 
performance(s), as applicable, shall be declared by the manufacturer.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  7 
 NOTE  Minimum frequencies of testing for factory production control purposes are given in Annex A.  
Table 9 — Resistance to natural ageing  
Property  Requi rements  Test 
parameters  Test method  Number of test 
specimens  
Resistance to 
natural ageing  - The decrease of bending 
strength shall be declared.  
- ΔL*, Δa*, Δb* ΔE* or gray 
scale rating shall be declared.  
- The change of the modulus 
of elasticity in bending shall be 
declared.  
- The appearance criteria, as 
defined by the manufacturer.  Exposure 
duration: 8 
760 h  Annex H  1 specimen/colour (5 
measurements /specimen) 
mounted to the test 
apparatus in the same way 
as for the bending test 
according to 4.5.2 giving 
the lower mean value for 
the maximum force  
 - The location of exposure and 
conditions shall be declared.     
 
Table 10 — Additional characteristics  
Prope rties  Test method  Number of test 
specimens  
Thermal properties  
Heat reversion (applicable to profiles)    
Heat build -up   
Reaction to fire - Single flame source test  ISO 11925 -2 6 specimens  
Spread of flame - Radiant heat source  ISO 9239 -1 6 specimens  
Mechanical characteristics  
Modulus of elasticity in bending  Annex F  8 specimens/face a 
Bending strength  Annex F  8 specimens/face a 
Resistance to indentation  ISO 13061 -11  3 specimens  
Resistance against biological agents  
Resistance against termitesb   
Resistance against discolouring micro -fungi b   
Resistance against discolouring algae b   
Other properties  
Resistance to salt spray (NSS test)  ISO 9227  2 specimens  
Degree of chalking (for coated products, 
only)  ISO 4628 -6 3 specimens  
a On both faces of the profile/tile, if  relevant.  
b If products of different geometries are made from the same material, only one product shall be  tested.  
 DUS 2269 :2022 
8 © UNBS 2022  – All rights reser ved 
 5 Marking  
The minimum required marking as defined in Table 11, shall be marked on the product or to a label attached 
to it. Where this is not possible, it shall be affixed to the packaging.  
Table 11 — Minimum required marking  
Aspects  Mark or symbol  
Reference of this standard   
Base polymer  e.g. PP  
Type of cellulose -based material a e.g. W  
Average content of cellulose -based material (%)  e.g. 60  
Use classb according to the environmental conditions  e.g. UC3  
a 
 
b See Table 12.  
 
See Table 5.   
Table 12 — Code for cellulose -based material  
Cellulose -based material  Symbol  
Wood  W 
Flax F 
Hemp  H 
Rice R 
Bamboo  B 
Paper  P 
Sisal S 
Coconut  C 
Other  O 
 
Facilitate timely allocation of shipping containers to exporting companies.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  9 
 Annex A  
(Informative)  
Minimum frequencies of testing for factory production control purposes   
Table A.1 — Minimum frequency of testing for factory produc tion control purposes   
Characteristic  Minimum frequency of testing  
Linear mass  1 specimen/production line ≤ 12 h  
Thickness, width, length  1 specimen/production line ≤ 12 h  
Straightness, cupping  1 specimen/production line ≤ 12 h  
Appearance  1 specimen/pr oduction line ≤ 12 h  
Flexural properties (modulus of elasticity in 
bending and bending strength)  1 specimen/ production line ≤ 12 h mounted to 
the test apparatus in the same way as for the 
bending test according to 4.5.2 giving the lower 
mean value for th e maximum force a 
Moisture resistance – Boiling test  1 specimen/production line ≤ 12 h  
Heat reversion (applicable to profiles)  3 specimens/ production line ≤ 12 h  
a On both faces of the profile/tile, if  relevant.  DUS 2269 :2022 
10 © UNBS 2022  – All rights reser ved 
 Annex B 
(Normative)  
Inclination plan te st 
B.1 Principle  
A person carrying out the test (test person) moves in an upright position forward and backwards on the 
surface subjected to the test. The surface is wetted with water containing a wetting agent. The inclination of 
the test rig is increased  starting from the horizontal position until an angle has been reached at which the 
testing person feels insecure.  
B.2 Testing person  
The testing person is a grown -up person with bare feet, whose feet shall have been wetted for at least 10 min 
prior to the  start of the test. The person shall be protected against a fall by a safety device, which shall allow 
an unrestricted movement on the surface under test.  
To acquaint the test persons with the test method, they should be trained on surfaces whose anti -slip 
properties have been previously determined in accordance with this method.  
B.3 Test rig  
A flat plate measuring 600 mm in width and 2 000 mm in length, with an adjustable angle of inclination from 0° 
to 45° shall be used as testing equipment; one short sid e shall be hinged to the floor and a clinometers with 
divisions of 1° shall be fitted on a side of the rig, showing the angle of inclination of the plate in relation to the 
horizontal plane.  
For the safety of the test person, handrails shall be fitted to b oth longitudinal sides of the rig.  
B.4 Test liquid  
The test liquid shall be an aqueous solution of a neutral wetting agent in a concentration of 1 g/l. Water may 
be supplied by the municipal drinking water system  
B.5 Test specimen  
The test specimen is a su rface of at least 1 000 mm in length and 500 mm in width. Components of irregular 
shape shall be placed on aside the other, as nearby as possible, to cover the test surface of 1 000 mm x 500 
mm. 
The number of test specimens shall be as specified in the ref erence standard.  
B.6 Test method  
The test specimen is mounted and centred on the flat plate of the test rig. During the whole test, the test 
specimen shall be continuously and regularly wetted with a least 5 l/min of the test liquid.  
If the fugues develop mainly in a specific direction, the specimen shall be tested in this direction and at a 90° 
angle.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  11 
 The test person moves half the length of a step forwards and backwards in an upright position, looking down 
to the test specimen surface, in a downstream dir ection. At the same time, the inclination of the test rig is 
increased by about 1° per second, starting from a horizontal position. The angle of inclination causing the test 
person to feel insecure shall be established through repeated changes of the incli nation of the rig around the 
critical value.  
B.7 Evaluation  
The test results are expressed according to three rating classes:  
 Class A: 12°: the items with a test result from 12° to 17°;  
 Class B: 18°: the items with a test result from 18° to 23°;  
 Class C: 2 4°: the items with a test result from 24° upwards.  
B.8 Test report  
The test report shall include the following information:  
a) a reference  to this subclause of the standard ; 
b) all the information necessary for identification of the product tested;  
c) the angle of inclination and rating group.  DUS 2269 :2022 
12 © UNBS 2022  – All rights reser ved 
 Annex C 
(Normative)  
Linear mass (applicable to profiles)  
C.1 Apparatus  
C.1.1 Balance, with an accuracy of 0 .1 g. 
C.1.2 Rule or measur ing tape, with an accuracy of 0. 5 mm  
C.2 Test specimens  
The length of the test specimen, meas ured between two cross sections cut perpendicularly to the main axis of 
the profile, shall be such that its mass is at least 50 g.  
The number of test specimens shall be as specified in the reference standard.  
C.3 Procedure  
Condition the test specimens befo re measuring according to 5.2, or, for the purpose of factory production 
control, according to 5.3.  
Measure the length, L, of the test specimen, in metres, to 1 mm. Measure the mass, M, of the test specimen, 
in grams, to 0 .2 g. 
C.4 Calculation and expressi on of results  
Calculate the linear mass of the test specimen, P, by using Formula (1):  
P = M/L  
Where,  
P is the value  of the linear  mass  of the test specimen,  expressed  in grams  per metre;  
M is the mass  of the test specimen,  expressed  in grams;  
L is the length of the test specimen,  expressed  in metres.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  13 
 Annex D 
(Normative)  
Dimensional characteristics  
D.1 Thickness, width and length (applicable to profiles, only)  
The measurements of the thickness and width of a test specimen shall be carried out manually with  an 
accuracy of 0.05 mm and the measurement of the length, with an accuracy of 1 mm.  
The number of test specimens shall be as specified in the reference standard.  
D.2 Deviation from straightness (applicable to profiles, only)  
The test shall be carried out  on the whole cross -section of the profile. The length of the test specimen shall be 
(1 000 ± 5) mm.  
The number of test specimens shall be as specified in the reference standard. The test specimen shall be 
tested in flatwise and edgewise positions.  
D.2.1  Place the test specimen with its concave side on a flat surface.  
D.2.2  Measure the gap(s) between the test specimen and the flat surface with an appropriate measuring 
device.  
D.2.3  Record the maximum value of the gap  
D.2.4  Cupping  
Measure the cupping (flatn ess deviation across the width) of the test specimen by using a bow gauge placed 
at the position of greatest deformation.  
Use a bow gauge, the length of which is at minimum the width of the test specimen, graduated to allow a 
reading to 0 .1 mm (see Figure 1). 
 
Key 
1 test specimen  
2 bow gauge  
DUS 2269 :2022 
14 © UNBS 2022  – All rights reser ved 
 Figure 1 — Bow gauge for measuring cupping  
Place the test specimen concave side up without restraint on a flat horizontal surface.  
Place the bow gauge so that the three points (two fixed and one movable) are lightly to uching the surface of 
the test specimen in the area of greatest deformation, and measure the flatness deviation (shown on the dial 
gauge) to the nearest 0 .1 mm.  
The two fixed points shall be at 5 mm apart from the edges of the flat surface of the test spec imen. The 
measured point shall correspond to the maximum bow.  
The measuring tip of the bow gauge shall have a diameter between 10 mm to 16 mm. The maximum flatness 
deviation measured using the bow gauge shall be recorded.  
The number of test specimens shall  be as specified in the reference standard.  
 DUS 2269:2022  
© UNBS 2022  – All rights reserved  15 
 Annex E 
(Normative)  
Falling mass impact resistance (applicable to products)  
E.1 Decking profiles and tiles  
E.1.1 Principle  
Test specimens cut from a profile are subjected to a blow from a mass falling from a kno wn height onto the 
exposed surface at midway between the supports, at a specified temperature.  
After testing, the test specimens are examined visually to detect any presence of surface cracks and to 
measure the residual indentation.  
E.1.2 Test method and t est parameters  
The resistance to impact shall be determined according to ISO 13061 -11. 
The mass of the striker, Ms with a smooth hemispherical striking surface of (25 ± 0 .5) mm radius and the 
falling height, H, of the striker from the top surface of the te st specimen shall be as specified in the reference 
standard.  
The two rounded off steel supports of the apparatus shall be (200 ± 1) mm apart.  
E.1.3 Test specimens  
The test specimens shall be (300 ± 1) mm long the actual width and thickness of the profile. The number of 
test specimens shall be specified in the reference standard.  
If the profile may be used on both faces, the two faces of the test specimens shall be tested. If not, only the 
useable face of the test specimen shall be tested.  
E.1.4 Conditioning  
Condition the test specimens according to 5.2.  
E.1.5 Procedure  
Submit each specimen to the following test at (23 ± 2) °C or (20 ± 2) °C:  
— set down the specimen on the supports with the extrusion direction of the test specimen perpendicular to 
the two rou nded steel supports and the determined impact point positioned vertically to the striker;  
— set up the falling height at the specified value in the reference standard;  
— release the striker.  
The impact position of the striker shall correspond to the weakes t area of the test specimen. For hollow 
profiles, it is normally on the line located at midway between two ribs. See Figure 2 a).  
Each longitudinal edge of the test specimen shall be tested. The impact position shall be determined in such a 
way that the ci rcumference of the striker shall be flush with the outer edge of the specimen surface (useable 
face). See Figure 2 b)  
 DUS 2269 :2022 
16 © UNBS 2022  – All rights reser ved 
 
 
  
 
a) Falling impact on the profile surface  b) Falling impact on a longitudinal edge  
Figure 2 — Falling impact testing on hollow profi le 
Where the impact energy may be transmitted between adjacent profiles (e.g. profiles with tongue and groove 
profiles), two test specimens shall be connected, as defined by the manufacturer. The impact shall be carried 
out with the striker set up symmetri cally to the joint.  
When illuminated , inspect the impact area of each test specimen by means of a magnifying glass (e.g. factor 
10). 
The longest perceptible surface crack is measured to an accuracy of 0 .5 mm (linear distance between end 
points of the crack).  
The maximum depth of the residual indentation is measured with a suitable measuring instrument (e.g. a 
vernier calliper) to an accuracy of 0 .1 mm. The measurements shall be carried out at the earliest 5 min after 
the impact.  
E.1.6 Profi le cladding  
E.2. Non-cellular material profiles  
E.2.1 Principle  
A test specimen cut from a profile is subjected to a blow from a mass falling from a known height onto  the 
exposed surface at midway between the supports, at a specified  temperature . 
After te sting, the test specimens are examined visually to detect any presence of failures.  
The energy levels are classified according to the results of a series of impact tests with a striker of specified 
mass.  
E.2.2. Apparatus  
The impact resistance test shall be  carried out with an impact testing machine, incorporating the following 
equipment:  
a) a main frame, rigidly fixed in the vertical position;  DUS 2269:2022  
© UNBS 2022  – All rights reserved  17 
 b) guide rails or a guiding tube, rigidly fixed to the main frame to guide the str iker and release it to fall 
vertically and freely  
c) rigid specimen support, comprising two rounded off steel supports (100 ± 1) mm apart, rigidly fixed to 
a solid foundation or to a table having a mass of more than 50 kg;  
d) release mechanism such that the stri ker can fall from a height which can be adjusted up to 1 500 mm, 
as measured from the top surface of the specimen;  
e) striker, with a smooth hemispherical striking surface of (25 ± 0,5) mm radius. The total mass of the 
striker shall be adjustable with relevan t additional masses to the following masses: (100 ± 1) g, (200 ± 
1) g, (300 ± 2) g, (400 ± 2) g, (500 ± 2) g, (600 ± 5) g, (1 000 ± 5) g, (1 500 ± 5) g, (2 000 ± 5) g or (m 
x 100 ± 5) g where m is an integer.  
E.2.3 Test specimens  
Cut 10 specimens, (200 ± 1 0) mm long, from profiles selected at random from three different batches or one 
batch in case of factory production control.  
In the case of profiles with webs, choose the impact point approximately at the midpoint between the 
supporting webs on the surfac e of the profile normally exposed, if applicable.  
If the geometry of the profile does not allow the impact point to be determined clearly, the impact point and the 
method of installation of the specimen shall be recorded.  
If the exposed and unexposed faces  of the profile are identical, mark each face and submit 10 specimens to 
the impact resistance test on the exposed face.  
E.2. 4 Conditioning  
The specimens shall be conditioned according to 5.2 or, for the purpose of factory production control, 
according to  5.3. 
E.2. 5 Procedure  
Submit each specimen to the following test at (23 ± 2) °C:  
 set down the specimen on the supports with the extrusion direction of the test specimen perpendicular 
to the two rounded steel supports and the determined impact point positi oned vertically to the striker;  
 set up the falling height at (1 000 ± 5) mm from the top surface of the specimen;  
 release the striker.  
Examine the specimen and record the result as “Passed” or “Failed”. Failure occurs when the impacted 
surface of the speci men splits or cracks. An unbroken dent of the impacted surface does not constitute failure.  
In case of a profile with a top layer/coating (laminated foil, lacquer -coating, co -extruded layer), delamination of 
the top layer shall also be considered as a fail ure. 
E.2.6 Cellular material profiles  
For cellular material profiles, the test method specified in 7.1.2.2.1 applies with the following changes:  
a) the test specimen shall be completely supported by a flat wooden plate (e.g. plywood of a minimum 
32 mm thickne ss) adjusted to the geometry of the profile to support it completely when tested. DUS 2269 :2022 
18 © UNBS 2022  – All rights reser ved 
 Possible voids between the back side of the profile and the support plate can be filled up with a soft 
material such as cellular rubber filler. Figure 3 gives examples of pro files and corresponding plates  
 
Key 
1 profile  
2 wooden plate  
Figure 3 — Examples of profiles and corresponding plates  
b) the distance between the two rounded off steel supports shall be (200 ± 1) mm;  
c) the test specimens shall be (300 ± 10) mm lo ng. 
 DUS 2269:2022  
© UNBS 2022  – All rights reserved  19 
 Annex F 
(Normative)  
Determination of the modulus of elasticity in bending and bending strength of profiles  
F.1 Principle  
The test specimen rests on two supports and is deflected by means of loading head between the supports. 
The test specimen is defle cted at a constant rate at mid -span until the maximum load is obtained ( F.5.2) or 
until rupture occurs ( F.5.3). During the procedure, the force applied to the test specimen and the resulting 
deflection at midpoint is measured.  
The modulus of elasticity in b ending is calculated by using the slope of the linear region of the load - deflection 
curve obtained in the test under standard conditions (see F.6.1).  
NOTE 2  The value calculated is the apparent modulus of elasticity, not the true modulus of elasticity, be cause the test 
method includes shear as well as bending.  
The bending strength is calculated by determining the ratio of the bending moment at the maximum load, 
obtained in the test under conditions defined by the manufacturer (see F.6.2) to the section mom ent of its full 
cross -section.  
NOTE 3  In case of hollow profiles, the bending strength is the apparent bending strength, because the test method 
includes shear as well as bending and the applying bending force deforms the profile cross section which causes  a 
significant change of the section moment.  
F.2 Apparatus  
F.2.1 Testing apparatus (Figure F.1), having the following essential components:  
a) Two parallel, cylindrical, roller -bearing supports of length exceeding the width of t he test specimen 
and of (15 ± 0 .5) mm diameter. The distance between the supports shall be adjustable.  
b) Cylindrical loading head, of the same length t han the supports and of (30 ± 0. 5) mm - in diameter, 
placed parallel to the supports and equidistant from them.  
c) Suitable instrument capable  of measuring the deflection of the test specimen a t mid -span with an 
accuracy of 0. 1 mm.  
d) Suitable load measurement system capable of measuring the load applied to the test specimen with 
an accuracy of 1 % of the measured value.  
e) Air oven, thermostatically controlled such that it operates at the temperature as specified in F.4. The 
air oven shall be equipped with a thermostat capable of maintaining the specified temperature to a 
permissible deviation of ± 2 °C  
f) Cold room, thermostatically controlled such that  it operates at the temperature as specified in F.4. The 
freezer shall be equipped with a thermostat capable of maintaining the specified temperature to a 
permissible deviation of ± 2 °C.  
F.2.2  Measuring instruments  
a) Micrometer with circular anvils of a dia meter (16 ± 1) mm, capable to exert a force at the 
measurement faces of (4 ± 1) N, allowing a reading within 0.01 mm.  
b) Vernier calliper with jaw width of at least 5 mm, graduated to allow a reading within 0.1 mm.  DUS 2269 :2022 
20 © UNBS 2022  – All rights reser ved 
 Key 
1 test specimen  
F load 
h thickness of t est specimen b width of the test specimen l1 span  
l2 length of the test  specimen  
Figure F.1 — Position of the test specimen at start of the test  
The contact of the test specimen with the supports and the cylindrical loading head shall be continuous. If 
necessary, appropriate spacers may be set between the test specimen and the roller -bearing supports and 
the cylindrical loading head. Additional details shall be given in the reference standard, where relevant.  
F.3 Test specimens  
The test specimens shall be c ut rectangular to the longitudinal direction of the profiles. The cross section of 
the test specimens shall be the full cross section of the profiles from which they are cu  
For the test under standard conditions ( F.5.2), the length of the test specimen l 2 shall be 20 times the nominal 
thickness h plus 100 mm.  
For the test under conditions defined by the manufacturer ( F.5.3), the length of the test specimen l 2 shall be 
the span defined by the manufacturer plus 100 mm.  
The span defined by the manufacturer is equal to the distance between the axes of the supports. The number 
of test specimens shall be as specified in the reference standard.  
F.4 Atmosphere for conditioning and testing  
The test specimens shall be conditioned according to Clause 5.  
The test specim ens shall be tested in the standard atmosphere 23/50, unless otherwise agreed upon the 
interested parties.  
DUS 2269:2022  
© UNBS 2022  – All rights reserved  21 
 Optionally, the test specimens may be tested in one of the following atmospheres:  
a) T1 = −20 °C ± 2 °C, 50 % RH (cold climate).  
Before testing at T1, the specimens shall remain in the cold room) at T1 for at least 2 h. The test shall be 
performed in the cold room or started within 1 min of being removed from the cold room.  
b) T2 = 50 ° C ± 2 °C, 50 % RH (warm climate).  
Before testing at T2, the specimens shall remain in the air oven at T2 for at least 2 h. The test shall be 
performed in the air oven) or started within 1 min of being removed from the air oven.  
F.5 Procedure  
F.5.1 Measure  the thickness h of each test specimen at the mid -length.  
For test specimens made from solid profiles with rectangular cross section, measure the width b of each test 
specimen at the mid -length.  
F.5.2 For the test under standard conditions:  
a) Adjust the distance between the centres of the supports (span) l1, within 1 mm, to 20 times the thickness 
h of the test specimen. The distance shall be not less than 100 mm.  
b) Measure the distance between the centres of the supports to the nearest 0.5 mm.  
c) Place t he test specimen flat on the supports, with its longitudinal axis at right angles to those of the 
supports with the centre point under the load (Figure F.1). 
d) Apply the load at a constant rate of cross -head movement throughout the test.  
The specimens sha ll be loaded at a constant strain rate of (1 ± 0.1) % per minute. Average time to failure for 
each test configuration shall be recorded. A constant rate of 1 % per minute is achieved by using a constant 
rate of the test cross head speed v, in millimetres p er minute, given by Formula ( F.1): 
 
Where,  
l1 is the span, expressed in millimetres;  
h is the thickness of the test specimen, expressed in millimetres.  
e) Measure the deflection of the test specimen at midspan (below the loading head) to an accuracy of 0 .1 
mm and plot this value against the corresponding loads measured to an accuracy of 1 % of the measured 
value. If deflection is determined by incremental readings, at least six pairs of readings shall be used.  
f) Record the maximum load F max to an accurac y of 1 % of the measured value.  
g) Test five test specimens with the exposable side upwards. If the profile may be used on both sides, the 
two sides of the test specimens shall be tested.  
F.5.3 For the test under conditions defined by the manufacturer:  
a) Adjust the distance between the centres of the supports (span) l 1, within 1 mm, to the span defined by the 
manufacturer.  DUS 2269 :2022 
22 © UNBS 2022  – All rights reser ved 
 Measure the distance between the centres of the supports to the nearest 0.5 mm.  
If the deflection of the test specimen is such that the  rupture does not occur, the span shall be reduced.  
b) Place the test specimen flat on the supports, with its longitudinal axis at right angles to those of the 
supports with the centre point under the load (Figure F.1). 
c) Apply a preload of 50 N. Then, ap ply a load, until the rupture, at a constant rate of cross -head movement 
throughout the test.  
d) Measure the deflection of the test specimen at midspan (below the loading head) to an accuracy of 0 .1 
mm and plot this value against the corresponding loads me asured to an accuracy of 1 % of the measured 
value. If deflection is determined by incremental readings, at least six pairs of readings shall be used.  
e) Record the maximum load F' max to an accuracy of 1 % of the measured value.  
f) Test five test specimens  with the exposable side upwards. If the profile may be used on both sides, the 
two sides of the test specimens shall be tested.  
F.6 Expression of results  
F.6.1 Modulus of elasticity in bending  
F.6.1.1  Solid profiles with rectangular cross section  
Calculat e the modulus of elasticity in bending, E m, in megapascals, for each test specimen, using Formula 
(F.2): 
 
 
Where,  
l1 is the span, in millimetres;  
F2 - F1 is the increment of load, in newtons, on the straight -line portion of the load -deflection curve obta ined in 
A.5.2 (Figure A.2). F1 shall be approximately 10 % and F 2 shall be approximately 20 % of the maximum load 
Fmax; 
b is the width, in millimetres, of the test specimen;  
h is the thickness, in millimetres, of the test specimen;  
a2 - a1 is the increment  of deflection, in millimetres, at the mid -length of the test specimen (corresponding to 
F2 – F1). DUS 2269:2022  
© UNBS 2022  – All rights reserved  23 
  
Key 
X deflection  
Y load 
Figure A.2 — Load -deflection curve within the range of elastic deformation  
The modulus of elasticity in bending E m for each test specimen shall be expressed to three significant figures.  
Calculate the arithmetic mean of the test results, expressed to three significant figures.  
F.6.1.2  Other shape of profiles  
Calculate the modulus of elasticity in bending, E m, in megapascals, for each test specimen, using Formula 
(F.3): 
 
l1 is the span,  in millimetres  
F2 - F1 is the increment  of load, in newtons,  on the straight  line portion  of the load-deflection curve  obtained  in F.5.2 (Figure  
F.2). F1 shall be approximatel y 10 % and F2 shall be approximately  20 % of the maximum  load Fmax;  
Jx is the second moment of area, in mm4, as specified by the manufacturer;  
a2 - a1 is the increment of deflection, in millimetres, at the mid -length of the test specimen (corresponding to  
F2 – F1). 
The modulus of elasticity in bending E m for each test specimen shall be expressed to three significant figures.  
Calculate the arithmetic mean of the test results, expressed to three significant figures.  
F.6.2 Bending strength  
F.6.2.1  Solid profi les with rectangular cross section  
Calculate the bending strength σ m, in megapascals, of each test specimen, using Formula ( F.4.1) or ( F.4.2), 
as relevant  
DUS 2269 :2022 
24 © UNBS 2022  – All rights reser ved 
 
 
 
 
 
Where,  
Fmax  is the maximum load, in newtons, obtained in F.5.2; F'max is the maximum load, in newtons, 
obtained in F.5.3; l1  is the span, in millimetres;  
b is the width, in millimetres, of the test specimen;  
h is the thickness, in millimetres, of the test specimen.  
The bending strength σ m for each test specimen shall be expressed to two significant  figures. Calculate the 
arithmetic mean of the test results, expressed to two significant figures.  
F.6.2.2  Other shape profiles  
Calculate the bending strength σ m, in megapascals, of each test specimen, using Formula ( F.5.1) or ( F.5.2), 
as relevant  
 
 
Wher e, 
MB is  the  bending    moment,  in   newtons    millimetres,    at   the  maximum   load  Fmax,  obtained   in F.5.2; 
Fmax is the maximum  load,  in newtons,  obtained  in A.5.2;  
M'B is  the  bending   moment,  in  newtons   millimetres,   at   the  maximum   load   F'max,  obtained   in F.5.3 
F'max is the maximum  load,  in newtons,  obtained  in F.5.3; 
l1 is the span,  in millimetres;  
Wx is the section  moment,  as specified  by the manufacturer.  
For profiles with a symmetrical cross section, calculate Wx using Formula ( F.6) 
 
Jx is the moment of inertia, in mm4, as specified by the manufacturer;  
h is the thickness, in millimetres, of the test specimen.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  25 
 This formula is not applicable for hollow profiles with unsymmetrical cross section. Wx is depending on the 
distance from the  centre of the area. It may be determined according the parallel -axis theorem, e.g. with 
appropriate software.  
The bending strength σ m for each test specimen shall be expressed to two significant figures. Calculate the 
arithmetic mean of the test results, expressed to two significant figures.  
F.7 Test report  
The test report shall include the following information:  
a) reference to this standard ; 
b) all the information necessary for identification of the profile tested, including type (solid or hollow profile), 
source, manufacturer's code number, form and previous history where these are known;  
c) dimensions of the te st specimens used for the determination of the modulus of elasticity in bending;  
d) dimensions of the test specimens used for the determination of the bending strength;  
e) span used for the determination of the modulus of elasticity in bending;  
f) span use d for the determination of the bending strength;  
g) method of preparing the specimens;  
h) conditioning and test conditions;  
i) moisture content of the test specimens;  
j) number of specimens tested;  
k) test speed;  
l) accuracy grading of the test machine;  
m) values and arithmetic means values deflection at the mid -length of the test specimens  
n) moment of inertia and section moment of the profile, if applicable;  
o) individual values and arithmetic means values for the modulus of elasticity in bending;  
p) individual values and arithmetic means values for the maximum load and the bending strength;  
q) mean values for the modulus of elasticity in bending and the bending strength  DUS 2269 :2022 
26 © UNBS 2022  – All rights reser ved 
 Annex G 
(Normative)  
Creep behaviour (applicable to finished products for non -load bear ing applications)  
G.1 Known span in use  
G.1.1 Principle  
A specimen is submitted to a three -point bending test under a constant load in a defined atmosphere. The 
deflection under a defined load and the residual deflection 24 h after removal of the lo ad are measured.  
G.1.2 Apparatus  
An apparatus, as described in F.2, shall be used.  
The distance between the supports shall be defined by the manufacturer and shall be equal to the nominal 
installation distance of the support structure of the profiles.  
G.1.3 Test specimens  
The length of the test specimen shall be equal to the distance between the supports, as defined in G.1.2, plus 
100 mm.  
The number of test specimens shall be as specified in the reference standard.  
G.1.4 Atmosphere for conditioning and testing  
The age of the test specimens shall be at least 24 h with a maximum of two weeks. The test specimens shall 
be conditioned according to 5.2.  
The test shall be performed in the atmosphere 23/50 [(23 ± 2) °C, (50 ± 10) % RH]. As an alternative, it  may 
be performed in the atmosphere 50/50 [(50 ± 2) °C, (50 ± 10) % RH].  
G.1.5 Procedure  
The specimens shall not be fixed on the supports.  
The load to be applied on the specimens shall be equal to 1 000 N when testing in the atmosphere 23/50 or 
850 N whe n testing in the atmosphere 50/50.  
The load shall be applied on the test specimen midway between the supports after conditioning during 1 h in 
its test set up.  
The test duration shall be 504 h (3 weeks) when testing in the atmosphere 23/50 or 168 h when te sting in the 
atmosphere 50/50.  
Measure and record the deflections ai, in millimetres, of each test specimen  at midspan to an accuracy of 0. 1 
mm: 
a) before applying the load, a 1; 
b) 1 min after the load is applied, a 2; 
c) at the end of loading (before the r emoval of the load), a 3; DUS 2269:2022  
© UNBS 2022  – All rights reserved  27 
 d) 24 h after the removal of the load, a 4. 
Calculate the deflection, Δs, by using Formula (2):  
s  a3  a2 
Where,  
Δs is the deflection, expressed in millimetres;  
a3 is the deflection at the end of loading before the removal of the  load, expressed in millimetres;  
a2 is the deflection 1 min after the load is applied, expressed in millimetres.  
Calculate the residual deflection, Δsr, by using Formula (3):  
sr  a4  a1 
Where,  
Δsr is the residual deflection, expressed in millimetres;  
a4 is the deflection 24 h after the removal of the load, expressed in millimetres;  
a1 is the deflection before applying the load, expressed in millimetres.  
G.2 Unknown span in use  
The test method specified in G.1 shall be applied with the following chan ges: 
a) the span shall be 20 times the thickness of the test specimen;  
b) the stress to be applied shall be 25 % of the of the maximum load F max determined according to F.5.2; 
c) the test duration shall be 168 h.  
Calculate the c reep factor by using Formula  : 
 
Where  
Cf is the creep factor of the test specimen, expressed as a dimensionless ratio;  
a1 is the deflection before applying the load, expressed in millimetres;  
a2 is the deflection 1 min after the load is applied, expressed in millimetres;  
a3 is the d eflection at the end of loading before the removal of the load, expressed in millimetres.  
Calculate the cre ep recovery by using Formula : 
 DUS 2269 :2022 
28 © UNBS 2022  – All rights reser ved 
 Where,  
Erc is the creep recovery of the test specimen, expressed as a percentage;  
a3 is the deflection at the end of  loading (before the removal of the load), in millimetres;  
a5 is the deflection after the removal of the load, expressed in millimetres;  
a1 is the deflection before applying the load, expressed in millimetres.  DUS 2269:2022  
© UNBS 2022  – All rights reserved  29 
 Annex H 
(Normative)  
Durability  
H.1 Resistance to artificial weathering  
H.1.1 Test methods for artificial weathering  
For products for external use, artificial weathering shall be performed by exposure to xenon -lamps acc ording 
to ISO 4892 -2:2013, Cycle 1, or to fluorescent UV -A 340 lamps according to ISO 4892 -3 or to medium 
pressure mercury lamps according to ISO 10640   provided that a correlation between the test results obtained 
with these light sources and these obtained after an natural exposure.  
For products for internal use, artificial weathering shal l be performed by exposure  to xenon -lamps according to 
ISO 4892 -2:2013, Cycle 2, or to fluorescent U V-A 351 lamps specified in ISO 16474 -3:2013 , using the 
principles of ISO 4892 -3, or to medium pressure mercury lamps according to ISO 10640   provided that a 
correlation between the test results obtained with these light sources and these obtained after an natural 
exposure.  
Only the exposed side(s) of the products shall be exposed to artificial weathering.  
H.1.2 Methods for assessing of the resistance to artificia l weathering  
Depending on the application, the assessment of the resistance to artificial weathering shall be based on one 
or several of the following characteristics:  
— the difference of colour expressed according to the grey  scale  or the difference  of co lour, ΔL*, Δa*, Δb*, 
ΔE* ; 
— appearance criteria, defined by the manufacturer;  
— the degree of chalking   
— the change of gloss  
— the peel strength resistanc e . 
H.1.3 Determination of colorimetric coordinates  
The coordinates of the CIE 1976 L*a*b* colour s pace and the colour diff erences ΔE*ab, as defined in ISO 
11664 -4, shall be determined according to the method specified in ISO 18314 -1, with the following conditions:  
— stand ard illuminant D65, defined in  ISO 11664 -2; 
— using observing fields of 2° or 10° angular subtense, defined in ISO 11664 -1; 
— measurement including the specular reflection and the geometry di:8° (without gloss trap).   DUS 2269 :2022 
30 © UNBS 2022  – All rights reser ved 
 1 H.2 Moisture resistance  
H.2.1 Swelling and water absorption  
H.2.1.1 General  
The swelling of compounds/products shall be  determined according to ISO 16983  with the following changes:  
a) The measurement of the dimensions in thickness, width and length of the specimens shall be carried out 
according to 8.3.1.2, 24 h, 2 days, 4 days, 7 days, 14 days and 28 days after the total im mersion into water at 
a temperature of (20 ± 2) °C.  
b) The water absorption of the compounds/product shall be calculated by differential weighing of the test 
specimens for each time period.  
c) For the determination of swelling of compounds, the dimensions of the test  specimens shall comply with 
ISO 178 . 
d) For the determination of swelling of products, the dimensions of the test specimens shall be 100 mm long 
and the actual width and thickness of the products  
The number of test specimens shall b e as specified in the reference standard.  
H.2.1.2  Measurement of  dimensions  
 
In case of profiles,  the measurements  of the dimensions  (thickness,  width  and length)  of a test specimen shall be carried  out by 
means   of  a  vernier  calliper   according   to  the  metho d  as  shown   in  Figures   4  and  5. 
The measuring  points  shall be fixed centrally  with respect  to the axis of symmetry  of the profile, independent  of whether  
there  is a rib or a hollow  chamber  below  the measuring  point.  
The measurement  of the thickness  shall be carried  out on the cross  section  of the profile.  The measuring  instrument  shall be applied  
at a distance  of 10 0 mm from the end of the profile  and shall be supported  over a length of at least 10 mm (Figure 5).  
In case of surface  with grooves,  the measuring  apparatus  shall be  positioned  with an angle  to overlap the grooves.  
 
 
a) Symmetrical  profile  
 
DUS 2269:2022  
© UNBS 2022  – All rights reserved  31 
  
b) Asymmetrical  profile  
Figure 4 — Measuring points for the determination of dimensions  
 
Figure 5 — Detail regarding measurem ent of profile thickness  
H.2.2 Moisture resistance under cyclic conditions  
The moisture resistance of products under cyclic conditions shall be determined according to ISO 16987  with 
the following changes:  
a) In ISO 16987 : 
1) The immersion period in water bath at (20 ± 1) °C shall be (28 ± 1) days. The measurement of the mass 
of the test specimens shall be carried out one day, two days, four days, seven days, 14 days and 28 days 
after the total immersion into water.  
2) The freezi ng period shall be (24 ± 1) h.  
3) The drying period shall be (72 ± 1) h.  
b) In ISO 16987 .3 for the second and third cycles:  
1) The immersion period in water bath at (20 ± 1) °C shall be (72 ± 1) h.  
2) The freezing period shall be (24 ±  1) h. 
3) The drying period shall be (72 ± 1) h.  
c) In ISO 16987 , remove the test pieces from the drying cabinet and condition for 72 h.  
DUS 2269 :2022 
32 © UNBS 2022  – All rights reser ved 
 The test specimens shall be defined in the reference standard.  
The number of test specim ens shall be as specified in the reference standard.  
The modulus of elasticity in bending ( F.6.1) and the bending strength ( F.6.2) shall be determined before and 
after the cyclic treatment.  
The decrease of the bending strength and the mo dulus of elasticity in bending shall be expressed as a 
percentage of the initial value.  
H.2.3 Moisture resistance – Boiling test  
H.2.3.1 Principle  
Test specimens are immersed in boiling water. After removal from the water, the water intake is determined.  
H.2.3.2 Test specimens  
The thickness and width of the test specimens before testing shall be the actual dimensions of the profile. The 
length of the test specimens (parallel to the direction of production) shall be (100 ± 2) mm.  
The number of test specimens  shall be as specified in the reference standard.  
The test specimens shall be tested at least 24 h and at latest 2 weeks after production. During this time 
period, the test specimens shall be stored a temperature of (23 ± 2) °C and a relative humidity of ( 50 ± 10) % 
RH. 
H.2.3.3 Procedure  
The test specimens are immersed in water after reaching the boiling point. The reduction of water temperature 
by adding the test specimens shall not last longer than 10 min.  
The test specimens are immersed in boiling water during 5 h ± 10 min.  
After 5 h storage in boiling water, the test specimens are immediately immersed in cold water at (20 ± 2) °C 
during 15 min.  
For each test, fresh water shall be used.  
Then, the test specimens are removed from water, excess water is take n off (e.g. by blowing off) and stored at 
a temperature of (23 ± 2) °C and a relative humidity of (50 ± 10) % RH.  
Within 120 min after the removal of the test specimens from water, the water uptake of the test specimens 
expressed as a percentage of the ini tial mass of the test specimen shall be determined.  
H.3 Resistance to natural ageing (external use)  
H.3.1 Test methods for natural ageing  
The direct exposure of products to solar radiation shall be carried out according to ISO 877 -2 
Only the exposed side(s ) of the products shall be exposed to solar radiation.  
For the assessment of solar irradiation conditions, it is recommended to refer to the WMO N° 8, 2008,  
Guide to Meteorological Instruments and Methods of Observation, Seventh edition [4].  DUS 2269:2022  
© UNBS 2022  – All rights reserved  33 
 NOTE  For examp le, a natural exposure during one year in the south of France is corresponding to a total 
solar radiant exposure of 6.6 GJ/m2 a nd an average temperature of 15. 5 °C.  
In addition to the total solar radiant exposure and the average temperature of the place of  exposure, the 
relative humidly should be taken into consideration.  
H.3.2 Methods for assessing the resistance to natural ageing  
Depending on the application, the assessment of the resistance to natural ageing shall be based on one or 
several of the follow ing characteristics:  
— the difference of colour expressed according to the grey scale or the difference  of colour, ΔL*, Δa*, Δb*, 
ΔE*; 
— appearance criteria, defined by the manufacturer;  
— the change of the modulus of elastic ity in bending ; 
— the resistance to falling mass impact  ; 
— the slip resistan ce; 
— the degree of chalkin g ; 
— the change of gloss  
— the peel strength resistanc e  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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34 © UNBS 2022  – All rights reser ved 
 Bibliography  
[1] BS EN 15534 -4:2014 , Composites made from cellulose -based materials and thermoplastics (usually 
called wood -polymer composites (WPC) or natural fibre composites (NFC)) - Part 4: Specifications for decking  
profiles and tiles  
[2] EN 15534 -1:2014 , Composites made from cellulose -based mat erials and thermoplastics (usually 
called wood -polymer composites (WPC) or natural fibre composites (NFC)) - Part 1: Test methods for 
characterisation of compounds and products  
 
 DUS 2269:2022  
© UNBS 2022  – All rights reserved  35 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bu reau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 2269:2022    
 
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