DRAFT UGANDA STANDARD  
  DUS 2130  
First E dition  
2019 -mm-dd 
 
 
 Reference number  
DUS 2130 : 201 9 
© UNBS 201 9  
  
School bags  — Specification   
 DUS 2130 : 2019 
ii © UNBS 2019 – 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  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  5 
2 Normative references  ................................ ................................ ................................ ............................  5 
3 Terms and definitions  ................................ ................................ ................................ ...........................  6 
4 Requirements  ................................ ................................ ................................ ................................ .........  7 
4.1 Making up  ................................ ................................ ................................ ................................ ...............  7 
4.1.1  Dimensions of school bag  ................................ ................................ ................................ ....................  7 
4.1.2  Seams and Stitches  ................................ ................................ ................................ ...............................  8 
5 Packaging  ................................ ................................ ................................ ................................ .............  12 
6 Marking  ................................ ................................ ................................ ................................ .................  12 
Annex  A (normative)  Determination of strap assembly strength  ................................ ...............................  14 
A.1 Top strap attachment strength  ................................ ................................ ................................ ..........  14 
A.2 Bottom  strap  attachment  strength  ................................ ................................ ................................ ... 14 
A.3 Joint strength  of strap  assembly  ................................ ................................ ................................ ...... 15 
Annex  B (normative)  Determination of dimensions  ................................ ................................ ....................  17 
B.1 Determine the bag dimensions  ................................ ................................ ................................ ..........  17 
B.2 Bag dimensions  ................................ ................................ ................................ ................................ .. 17 
B.3 Face  pocket  ................................ ................................ ................................ ................................ .........  17 
B.4 Top handle  ................................ ................................ ................................ ................................ ...........  17 
B.5 Straps,  webbings  and buckles  ................................ ................................ ................................ ..........  18 
Annex  C (normative)  Determination of stitches per cm  ................................ ................................ ..............  22 
Annex  D (inform ative)  Preferred Buckles  ................................ ................................ ................................ ..... 23 
Annex  E (normative)  Drop test  ................................ ................................ ................................ .......................  24 
E.1 Procedure  ................................ ................................ ................................ ................................ .............  24 
Annex  F (informative)  Recommended use of back pack type school bags  ................................ ..............  25 
F.1 Introduction  ................................ ................................ ................................ ................................ ..........  25 
F.2 Health  and safety  precaution  ................................ ................................ ................................ ............  25 
F.3 Recommendations  for use ................................ ................................ ................................ ................  25 
 DUS 2130 : 2019 
iv © UNBS 2019 – All rights reserved  
 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 elaboration 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 Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a giv en field or area and consists of key stakeholders 
including government, academia, consumer groups, private secto r 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/TC 7 , Textile, Leather, Paper and Related 
Products, Subcommittee SC 1 , Textile and Related products  
 DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  v 
 School bags  — Specification  
1 Scope  
This draft Uganda  Standard specifies  materials, making  up, marking  and labelling requirements  for 
school  bags  of back  pack  type. 
2 Normative references  
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For 
undated references , the latest edition of the referenced document (including any amendments) applies.  
ISO 105 B04, Textiles  — Colour  fastness  Part B04: Determination  of colour  fastness  to weathering:  
Xenon  arc fading  lamp  test 
ISO 105 E01, Textiles  — Tests  for colour  fastne ss Part E01: Colour  fastness  to water  
ISO 811, Textile  fabrics  — Determination  of resistance  to water  penetration  
ISO 1833 -11, Textiles  — Quantitative  chemical  analysis  Part 11. Mixtures  of cellulose  and Polyester  
fibres  (method  using  sulphuric  acid)  
ISO 2076: Textiles  — Man-made  fibres  — Generic  names  
ISO 3759,  Textiles  — Preparation,  marking  and measuring  of fabric  specimens  and garments  in tests  for 
determination  of dimensional  change  
ISO 6940, Textile  fabrics  — Burning  behaviour  — Determination  of ease  of ignition  
US ISO 13934 -1, Textiles  — Tensile  properties  of fabrics  Part 1: Determination  of maximum  force  and 
elongation  at maximum  force  using  the strip method  
ISO 13936 -1, Textiles — Determination of the slippage resistance of yarns at a seam in woven fabrics — 
Part 1: Fixed seam opening method  
ISO 13936 -2, Textiles — Determination of the slippage resistance of yarns at a seam in woven fabrics — 
Part 2: Fixed load method  
ISO 13937 -1, Textiles — Tear properties of fabrics — Part 1: Determination of tear force using ballistic 
pendulum method (Elmendorf)  
ISO 14389, Textiles — Determination of the phthalate content — Tetrahydrofuran method  DUS 2130 : 2019 
vi © UNBS 2019 – All rights reserved  
 ISO 16373 -2, Textiles — Dyestuffs — Part 2: General method for the determination of extractable 
dyestuffs including alle rgenic and carcinogenic dyestuffs (method using pyridine -water)  
ISO 16373 -3, Textiles — Dyestuffs — Part 3: Method for determination of certain carcinogenic dyestuffs 
(method using triethylamine/methanol)  
US 591,  Textile fabrics — Abrasion resistance of te xtile fabrics (Martindale test)  
US 948 -1., Textiles — Sewing threads — Part 1: Sewing thread made wholly or partly from synthetic 
fibres — Specification  
US EAS  223, Zippers  — Specification  of vertically  oriented  specimens  
US ISO  105 B02, Textiles  — Colour  fastness,  Part B02: Determination  of colour  fastness  to artificial  light:  
Xenon  arc fading  lamp  test 
US ISO  105 C10, Textiles  — Colour  fastness  Part C10 Colour  fastness  to washing  with soap  or soap  with 
soda  
US ISO  105 E04, Textiles  — Tests  for colour fast ness  Part E04: Colour  fastness  to perspiration  
US ISO  105 X12, Textiles  — Tests  for colour  fastness  Part X12:Colour  fastness  to rubbing  
US ISO  3758, Textiles  — Care  labeling  using  symbols  
US ISO 3801, Textiles — Woven fabrics — Determination of mass per un it length and mass per unit 
area 
US ISO  5077, Textiles  — Determination  of dimensional  change  in washing  and drying  
US ISO 6330 , Textiles  — Domestic  washing  and drying  procedures  for textile  testing  
US ISO  6941,  Textile  fabrics  — Burning  behavior  — Measurem ent of spread  properties  of vertically  
oriented  specimens  
US ISO 13935 -1, Seam  Tensile  properties,  Part 1: Strip test  
ISO/TR  11827, Textiles  — Composition  testing  — Identification  of fibres  
3 Terms and definitions  
For the purposes of this document, the fo llowing terms and definitions apply.  
3.1  
School bag  
any textile package used for carrying learning materials and related items  DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  vii 
 3.2  
School  
an institution providing education for young people up to the age of about 18 years. These  are nursery 
schools, prim ary schools and secondary schools . 
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Requiremen ts 
4.1 Making up  
4.1.1  Dimensions of school bag  
The overall  dimensions  of the school  bag and its components  are given  in Table  1 
Table 1  — Dimensions of school bag in cm  
Type  Parameter  Requirement  Test  Method  
minimum  maximum  
Back pack school 
bag (See Annex B ) Overall Dimensions,
 in cm  Back to Front  9 15 Annex B  
Bottom Width  23 36 
Top Width  18 34 
Height  28 55 
Piping  0.35 0.48 
Face Pocket  Top Width  13 
18 26 
32 Bottom Width  
Height  15 44 
Piping  0.35 0.48 
Top Handle  Length  15.5 18 
Height  3 5 
Top Strap  Length  30 41 
Width  3 7 
Bottom  Strap 
(Webbing)  Length  30 46 
Width  2 4 
Buckle  Width  2 4 
Length  3 5 DUS 2130 : 2019 
viii © UNBS 2019 – All rights reserved  
  
4.1.2  Seams and Stitches  
4.1.2.1  The school  bag shall have  a face,  back  and middle  panels  shaped  symmetrically.  
4.1.2.2  The panels  constituting  the school  bag shall be joined  with stitched  seams.  
4.1.2.3  The bag may have  a pocket  stitched  on the face panel.  
4.1.2.4  The stitched  seams  shall bear a piping  as specified  in Table  1. 
4.1.2.5  The stitches  per centimetre  shall be as specified  in Table  3 and be tested  in accordance  with 
Annex  C. 
4.1.3  Straps  and top handle  
The top straps  where  provided  shall be stitched  with a lining  fabric  enclosing  a polyolefin  or 
polyurethane  expanded  material  and comply  with the requirements  given  in Table  2 
Table  2 — Requirements  for padding  material  
Sr No Fibre  type Density  in kg/m3, 
min. Thickness  in mm, 
min. Test Method  
i) Expanded  polyolefin  19 5 Annex  A 
ii) Polyurethane  foam  19 5 
 
4.1.4  Zippers  
The openings  of the bag and pocket  shall have  zippers  complying  with the requirements  of US EAS 
223 and Table  3 in terms  of grade  and tensile  strength  characteristics  and attached  to the middle  
panel  of the bag with a double  stitch  
4.1.5  Piping  
The stitched  seams  shall be reinforced  with piping  made  out of material  similar  to that of the panels  of 
the bag, with a core material  strong  enough  to serve  the intended  purpose.  The piping  expressed  as 
diameter  and measured  with a Vernier  calliper  shall comply  with the requirements  of Table  1. (See  Annex  
B). 
4.1.6 Lining  
The faces of the bag panels shall be lined with a lining fabric of a hue close to that of the panels of the 
bag. 
4.1.7  Padding  DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  ix 
 The bag shall have a padding stitched at the back panel and comply with the requirements given in 
Table 2 above  
4.2 Materi als and accessories  
4.2.1  Fabric  
The fabric constituting the panels of the bag shall be of polyester fibre specified in ISO 2076. Fabric fibre 
content shall be tested in accordance with ISO 1833 Part 11 and ISO /TR 11827 . 
4.2.2  Straps  and top handle  
4.2.2.1  The back panel of the bag shall have two top and bottom straps double stitched with sewing 
thread.  
4.2.2.2  The top straps  shall be constructed  from the fabric  of the bag and lined  with a fabric   
4.2.2.3  The top straps  shall encompass  a strip of foam  or expanded  polyolefin  material.  
4.2.2.4  The foam  and expanded  polyolefin  materials  shall comply  with the requirements  of Table  2 
4.2.2.5  The bottom  straps  shall be webbing  material  made  out of synthetic  fibres   
4.2.2.6  The straps  assembly  shall have  a buckle  complying  with the requirements  of 4.2.5,as  a 
fastening  provision  when  mounted  at the back  of the user.  
4.2.2.7  A top handle  shall be fixed  on the middle  panel  and comply  with the requirements  of Tables  1 
and 3 
4.2.3  Sewing  thread  
The sewing  threads  used  for making  up the seams  of the school  bag shall be of synthetic  fibre,  
preferably  polyester  and comply  with US 948 -1. 
4.2.4  Zippers  
The openings of the bag and pockets shall incorporate zippers complying with US EAS 223 and 
requirements in Table 3 . 
4.2.5  Buckles 
The dimensions of the buckles shall comply with the requiremen ts of Table 1. (See also Annex D ). 
4.3 Physical requirements  
4.3.1  The bag shall comply  with the following  physical  characteristics:  
a) mass in grams  per metre  square ; 
b) tensile  strength ; DUS 2130 : 2019 
x © UNBS 2019 – All rights reserved  
 c) tear strength ; 
d) drop test; 
e) seam strength ; 
f) strap pulling  strength ; 
g) zippers ; 
h) water resistance ; 
i) hydrostatic  head  test; 
j) stitches  per cm; 
k) strap assembly  joint strength ; 
l) zippers ; 
m) top handle  pulling  strength ; and  
n) abrasion  resistance . 
4.3.2  Specification  levels  of the physical  requirements  are given  in Table  3 
Table  3 — Physical  requirements  
Sr No  Parameter  Requirement  Test Method  
i. Tensile strength in N, min  Warp  445 US ISO 13934 -1 
Weft 287 
ii. Tear resistance in N, min  Warp  63 ISO 13937 -1 
Weft 52 
iii. Seam s trength in N, min   
 
235 ISO 13936 -1 
iv.  
Strap  pulling  strength  in N, 
min. Top 425 Annex  A 
Bottom  330 
v. Water  resistance,  cm head  of water,  min. 150 ISO 811 
vi. Abrasion resistance, number of rubs, min.  1250  US 591  DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  xi 
 vii. Strap joint strength in N, min. 365 Annex A 
viii. Seam  slippage, at 3  mm 
opening, load in N, min.  Warp  100 ISO 13936 -2 
Weft 100 
ix. Stitches per cm  2-3 Annex C  
x. Mass in g/m2, min.  330  
US ISO 3801  
xi. Drop test based on 3 -10 kg load, at 1 metre 
height  Pass  Annex E  
xii. Top handle attachment strength, in N, min,  305  
xiii. 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
Physical requirements of zippers, in N, min.  Puller 
attachment  200 US EAS 223  
Closed end test  80 US EAS 223  
Top stop test   
90 US EAS 223  
Open end 
fastener box test  90 US EAS 223  
Lateral strength 
test 250 US EAS 223  
Lateral strength 
of open end  90 US EAS 223  
Slider locking 
test 25 US EAS 223  
 
4.4 Colourfastness requirements  
The school bag shall comply with the following colour fastness requirements . 
4.4.1  Colour  fastness  to weathering  
4.4.2  Colour  fastness  to light 
4.4.3  Colour fastness to water  
4.4.4  Colour  fastness  to perspiration  
4.4.5  Colour  fastness  to washing  
4.4.6  Colour  fastness  to rubbing  DUS 2130 : 2019 
xii © UNBS 2019 – All rights reserved  
 Table  4 — Colour  fastness  requirements  
Sr No Agency  Rating,  min. Test Method  
1 Light  5 US ISO 105 B02  
2 Weathering  5 ISO 105 B04 
3  
Perspiration  Acid Colour Change  4  
US ISO 105 E04  
Staining  4 
Alkali  Colour change  4 
Staining  4 
4 Washing  Colour change  4 US ISO 105 C10  
Staining  4 
5 Water  Colour change  4 ISO 10 5 E01  
Staining  4 
6 Rubbing  Wet 4 US ISO 105 X12  
Dry 3-4 
 
4.5 Dimensional change  
Dimensional  change  after five washings  of the fabrics  constituting  the bags  shall be a maximum  of 3 % 
when  tested  in accordance  with ISO 3759,  US ISO 6330  and US ISO 5077  
4.6 Flammability  
The fabrics  making  up the bags  shall meet  the flammability  requirements  in terms  of ease  of ignition  
and flame  spread  time when  tested  in accordance  with ISO 6940  and US ISO 6941.  
4.7 Restricted colorants  
Where  colorants  have been applied on the bags,  the dyed  fabric  shall not contain  dyestuffs  specified  in 
ISO 16373 -2 and ISO 16373 -3 and pthalates  detected  and quantified  in accordance  with ISO 14389  
shall not be more  than 0.1 % by mass  
5 Packaging  
The unit and bulk packages of school bags shall  be packed  in such  a manner  as to prevent  soiling  and 
damage  
6 Marking  
6.1 Unit packages  
The following  information  shall be marked  legibly  and indelibly  on a label  affixed  on each  bag DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  xiii 
 a) manufacturer's name or registered trade mark;  
b) fibre type and content;  
c) care instructions in accordance with US ISO 3758;  and 
d) Country of manufacture.  
6.2 Bulk packages  
a) the information given in 6.1; and  
b) number of school bags  
 DUS 2130 : 2019 
xiv © UNBS 2019 – All rights reserved  
 Annex  A 
(normative)  
 
Determination of strap assembly strength  
A.1 Top strap attachment strength  
A.1.1 Extract  and Mount  a specimen,  with the strap fixed  at the top jaw  and the bag  fabric  part fixed  at 
the bottom  jaw ensuring  that the top strap  attachment  seam  is clear  from the bottom  jaw line and the 
specimen  length  is at least  30 cm to comply  with a gauge  length  of 20 cm. 
A.1.2 Determine the top strap attachment strength as the seam tensile strength of the specimen in 
accordance with US ISO 13935 -1 
A.2 Bottom  strap  attachment  strength  
A.2.1  Extract  and mount  a specimen,  with the bottom  strap  (webbing)  fixed  at the top jaw and the 
bag fabric  part fixed  at the bottom  jaw of a tensile  testing  machine   
A.2.2  Ensure that the bottom strap (webbing) attachment seam is clear from the bottom jaw line and 
the length of the specimen is at least 30 cm to comply wit h a gauge length of 20cm . 
A.2.3  Determine  the bottom  strap  (webbing)  attachment  strength  as the seam  tensile  strength  of 
the specimen  in accordance  with US ISO 13935 -1 
For top strap  and bottom  strap  (webbing)  attachment  strength  test, see Figure  A.1 DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  xv 
  Figure A.1 — Top strap and bottom strap (webbing) 
attachment strength test  
A.3 Joint  strength  of strap  assembly  
A 3.1 Fasten  the top strap  and bottom  strap  (webbing)  by means  of the buckle  provided  with the bag 
strap  assembly.  
A.3.2  Ensure  that the length  of the joint assembly  is at least  30 cm and extract  the test specimen  
by cutting  from both ends  of the strap  assembly  to facilitate  the tensile  test 
A.3.3  Determine  the joint strength  of the strap  assembly  as the tensile strength  tested in accordance  
with US ISO 13935 -1 
For top strap,  bottom  strap  (webbing)  and buckle  assembly, see figure A.2  
DUS 2130 : 2019 
xvi © UNBS 2019 – All rights reserved  
  Figure  A.2 — Strap  assembly  joint  strength  test 
 
DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  xvii 
 Annex  B 
(normative)  
 
Determination of dimensions  
B.1 Determine the  bag dimensions  
Determine  the bag dimensions  shall be as specified  in B.2, B.3.and  B.4 by use of a steel  rule .Ensure  
that the area to be measured  is free from creases  and folds  
For details  See Figures  B.1 to B.3. 
B.2 Bag dimensions  
B.2.1  Height  
B.2.2  Top width  
B.2.3  Bottom  width  
B.2.4  Back  to Front  
B.2.5  Piping  
B.3 Face  pocket  
B.3.1  Height  
B.3.2  Top width  
B.3.3  Bottom  width  
B.4 Top handle  
B.4.1  Height  
B.4.2  Span  DUS 2130 : 2019 
xviii © UNBS 2019 – All rights reserved  
 
B.5 Straps,  webbings  and buckles  
B.5.1  Width  
B.5.2  Height  
 
 
Top handle  2mm  
thick  
 
A1 Piping  
 
 
Face  pocket  
 
Piping  
 
B1 
 
 
 
FRONT  VIEW  
Figure B.1 Front view of back pack type of bag  
A 
B 
H 
H 1 DUS 2130 : 201 9 
© UNBS 201 9 – All rights reserved  xix 
  
Figure B.2  Rear view of back pack type of school bag  
 
 
DUS 2130 : 2019 
xx © UNBS 2019 – All rights reserved  
 
Key to figuresC.1  and C.2 
A A1 B B1 H H1 
Bag 
width  Top Face  Pocket  
top width  Bag 
width  Top Face  Pocket  
Bottom  width  Bag Height  Face  
Height  Pocket  
 
 
Top handle  
2mm  thick  
Piping  
 
 
Piping  
 
Strap  
 
Buckl
e 
 
Webbi
ng 
 
 
 
 Pocket  zip DUS 2130 : 201 9 
xxi  
 SIDE  VIEW  
Figure  B.3 — Side  view  of back  pack  type  of bag 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
xxii © UNBS 2019 – All rights reserved  
 Annex  C 
(normative)  
 
Determination of stitches per cm  
Count  the number  of stitches  along  a seam  length  of known  distance  in centimetres  and determine  the 
number  of stitches  per centimetre  
  
© UNBS 201 9 – All rights reserved  xxiii 
 Annex  D 
(informative ) 
 
Preferred Buc kles 
 
 
 
xxiv © UNBS 2019 – All rights reserved  
 Annex  E 
(normative)  
 
Drop test  
E.1 Procedure  
A back  pack  type bag of specified  dimensions  (see Table  E.1) is loaded  with relevant  learning  materials  of 
mass  (3-10 kg) collated  with the size of bag. The loaded  bag is dropp ed from the edge  of a bench, one  
metre  high,  to a flat floor.  The drop test is repeated  10 times.  After  the test, the tested  bag is examined; the  
stitches  and seams  shall not open  and the straps,  webbings  and buckles  shall not give way or come  off the 
stitched  tacks  
Table  E.1 — Preferred  bag dimensions  related  to carrying  capacity  
 
Category  of size Preferred  Dimensions  of bag in cm Preferred  capacity  in 
kg Height  Top Width  Bottom  Width  Back  to Front  
1 28 18 23 8 0-2 
2 28-31 18-20 23-25 8-9 2-3 
3 31-37 20-24 25-28 9-11 3-5 
4 37-44 24-28 28-32 11-13 5-7 
5 44-55 28-34 32-36 13-15 7-10 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
© UNBS 201 9 – All rights reserved  xxv 
 Annex  F 
(informative)  
 
Recommended use of back pack type school bags  
F.1 Introduction  
Students in primary, secondary and tertiary schools commonly use back  pack type bags to carry their books 
and other lea rning materials. The back  pack type bag is a noted manual carriage that provides versatility and 
is appropriate way to load the spine closely and symmetrically, while maintaining stability . 
F.2 Health  and safety  precaution  
Studies have shown that heavily loaded bags of more than 10 % of the learners’ body mass can cause 
musculoskeletal problems that can also lead respiratory difficulties. It is therefore necessary to select the right 
size of back pack type b ag whose maximum load capacity will not exceed 10 per cent of your body mass (see 
Table E1) . 
F.3 Recommendations  for use 
F.3.1  Establish the average body mass of the intended user of the back pack type school bag by use of a 
weighing scale.  
F.3.2  Do not load the back  pack  type bag above the  maximum  weight  for your category  specified  in Table  
E1 during  the intended  use. 
F.3.3  Ensure  that both straps  of the back  pack  are fastened  to the webbings  over shoulders  and the bag in 
the right place  during  movement.  
F.3.4 Avoid any form of exercise while the back pack type bag is fastened to your body   
xxvi © UNBS 2019 – All rights reserved  
 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 con junction 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 wit h the 
certification mark scheme of the Uganda National Bureau 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 Directo r, Uganda 
National Bureau of Standards.  
 
 DUS 2130 : 201 9   
 
ICS 55.080  
Price based on nn pages  
© UNBS 201 9– All rights reserved