FINAL DRAFT UGANDA 
STANDARD  
  FDUS 1910-1  
First Edition  
2018-mm-dd  
 
 Reference number 
FDUS 1910-1: 2018 
© UNBS2018  
  
Furniture — Metal chairs for office purposes — Part . 1: 
Specification for non-revolving and non-tilting cha irs  
 FDUS 1910-1:2018 
ii © UNBS 2018 – All rights reserved
 Compliance with this standard does not, of itself c onfer immunity from legal obligations 
A Uganda Standard does not purport to include all n ecessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2018  
All rights reserved. Unless otherwise specified, no  part of this publication may be reproduced or util ised in any 
form or by any means, electronic or mechanical, inc luding photocopying and microfilm, without prior wr itten 
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: +256 417 333 250/1/2 
Fax: +256 414 286 123 
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 FDUS 1910-1:2018 
© UNBS 2018 – All rights reserved  iii
 Foreword 
Uganda National Bureau of Standards (UNBS) is a par astatal 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 Stan dardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentar ius 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 o ut through Technical Committees. A Technical 
Committee is established to deliberate on standards  in a given field or area and consists of key stake holders 
including government, academia, consumer groups, pr ivate sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Com mittee are widely circulated to stakeholders and th e 
general public for comments. The committee reviews the comments before recommending the draft standard s 
for approval and declaration as Uganda Standards by  the National Standards Council. 
The committee responsible for this document is Tech nical Committee UNBS/TC 12, Furniture . 
 
 FINAL DRAFT UGANDA STANDARD FDUS 1910-1:2018 
 
© UNBS yyyy – All rights reserved  1
 Furniture — Metal chairs for office purposes — Part  1: 
Specification for non-revolving and non-tilting cha irs  
1 Scope 
This Final Draft Uganda Standard covers requirement s for materials, construction, dimensions and finis h of 
non-revolving and non-tilting metal chairs for offi ce purposes . 
2 Normative references  
The following referenced documents referred to in t he text in such a way that some or all of their con tent 
constitutes requirements of this document. For date d references, only the edition cited applies. For u ndated 
references, the latest edition of the referenced do cument (including any amendments) applies 
ISO 1520, Paints and varnishes -- Cupping test 
ISO 2009, Slotted countersunk flat head screws -- Product gra de A  
ISO 4624, Paints and varnishes -- Pull-off test for adhesion  
ISO 4950-1, High yield strength flat steel products -- Part 1: General requirements (sheets)  
US ISO 6361-1, Wrought aluminium and aluminium alloys — Sheets, st rips and plates — Part 1: Technical 
conditions for inspection and delivery  
US ISO 6362-1, Wrought aluminium and aluminium alloys —  Extruded rods/ bars, tubes and profiles — Part 
1: Technical conditions for inspection and delivery  
ISO 6860, Paints and varnishes -- Bend test (conical mandrel)  
ISO 9692-3, Welding and allied processes — Types of joint prepa ration — Part 3: Metal inert gas welding and 
tungsten inert gas welding of aluminium and its all oys 
ISO 11503, Paints and varnishes -- Determination of resistance  to humidity (intermittent condensation)  
ISO 12633-1, Hot-finished structural hollow sections of non-allo y and fine grain steels — Part 1: Technical 
delivery conditions  
ISO 15184, Paints and varnishes -- Determination of film hardn ess by pencil test  
ISO 16143-3, Stainless steels for general purposes -- Part 3: Wire 
ISO 16925, Paints and varnishes -- Determination of the resist ance of coatings to pressure water-jetting  
US 1633, Cold rolled low carbon steel flat products  for cold forming — Technical delivery conditions  
2 © UNBS2018 – All rights reserved
 3 Types 
Different types of metal chairs shall be classified  as given below: 
a) chairs with and without arms; and 
b) chairs with different types of seats and backs. 
4 Materials requirements 
4.1  Aluminum sheets shall conform to alloy designation  NS3, NS4 or 315CO in H conditions of US ISO 
6361-1. 
4.2 Wax polish shall conform to US 573. 
4.3  Mild steel sheets shall conform to ISO 4950-1. 
4.4 Mild steel tubes shall conform to ISO 12633-1. 
4.5 Aluminium tubes shall conform to US ISO 6362-1. Alu minium tubes with the following mechanical 
properties may also be used: 
• Minimum tensile strength:   26 kg f/mm 2; and 
• Minimum elongation on 50 mm: 16 % gauge length. 
4.6 Screws shall conform to ISO 2009. 
4.7 The wood suitable for furniture shall be used. 
5 Dimensions 
The dimensions of metal chairs shall conform to FDU S 1903. 
6 Fabrication 
6.1 Components  
Metal chairs shall be assembled from the components  given in 6.1 to 6.3 . 
6.2 Tubular frame 
6.2.1 Aluminum tubular frame  
The aluminium tubular frame shall be made from tubu lar pipes with a wall thickness not less than 1.60 mm. 
The tubular pipe shall be either round or square in  section. The outside diameter of round tubular pip e shall be 
not less than 25 mm and in the case of square secti on the side of the square shall be not less than 20  mm . 
6.2.2 Mild steel tubular frame 
The mild steel tubular frame shall be made from tub ular pipes with a wall thickness not less than 1.25  mm and 
outside diameter as 25 mm .  FDUS 1910-1:2018 
© UNBS 2018 – All rights reserved  3
 6.2.3 Frame  
The frame shall be in one piece or may be jointed a t one place by inserting a piece of tubular pipe in  the joint 
with outer diameter equal to inside diameter of the  tubular frame; then the joint shall be secured. At  every 
change of direction, the tube shall be curved to th e minimum radius possible without causing any crack s, 
unevenness or other defects in the bend. In the cas e of cantilever type of chairs bends where necessar y shall 
be stiffened by inserting a piece of tubular pipe h aving outside diameter equal to the inside diameter  of the 
tubular pipe used for frame. 
6.3 Seat and backrest  
The seat and backrest shall be fabricated from a si ngle piece of mild steel sheet not less than 1.0 mm  thick or 
from aluminium sheet not less than 1.6 mm to form a  comfortable fitting shape and there shall be no sh arp 
exposed edges. The seat and backrest may also be pa dded, caned and fabricated out of mould plywood or 
moulded wood . 
6.4 Armrest  
Armrests shall be made from wood suitable for furni ture. Armrest may also be padded. These armrests sh all 
be shaped to ensure comfort to the users. The armre sts should be fixed to, the tubular arms securely w ith 
screws from the under-side .  
6.5 Studs  
Studs for chairs shall be made either from rubber o r suitable material . 
7 Assembly 
The components shall be assembled by means of weldi ng or bolting and welding of aluminium parts shall be 
in accordance with ISO 9692-3:2016   
8 Finish 
8.1 Metal components 
8.1.1 All dents, burrs and sharp edges shall be removed f rom the various components. The components 
shall be individually pickled, scrubbed and rinsed to remove grease, rust, scale or any other foreign element. 
8.1.2 Immediately after pickling, all the mild steel part s shall be given phosphating treatment conforming t o 
ISO 9567. 
8.1.3 Putty shall be applied to all the surfaces requirin g filling. 
8.1.4  Coat/coats of enamel paint shall then be applied a s follows: 
a) finish coat with enamels conforming to ISO 28762; a nd  
b) in case of stoving enamel the components shall t hereafter be baked at a specified  temperature in an 
oven heated uniformly. 
8.1.5  The finish shall be free from all visible defects and shall not chip when tapped lightly with a dull 
pointed instrument .  
4 © UNBS2018 – All rights reserved
 8.2 Wooden arms 
The wooden arms shall be polished either with wax p olish or a transparent glossy French polish, or sta ined 
dark and polished or lacquered as desired by the pu rchaser. 
9 Performance requirements of finish 
9.1 Scratch hardness test   
Use ISO 15184. 
9.2 Pull off adhesion test 
Use ISO 4624. 
9.3 Resistance of coating to pressure water jetting  test 
Use ISO 16925. 
9.4 Resistance to humidity (intermittent condensati on) test 
Use ISO 11503. 
9.5 Bend test  
Use ISO 6860. 
9.6 Cupping test 
Use ISO 1520. 
10 Packing 
All the component parts shall be packed in such a w ay that no damage is caused to them during transit . 
11 Information to be supplied by the purchaser 
The purchaser shall supply the following informatio n to the supplier along with the order: 
a) type required; 
b) color and finish; and 
c) where alternative methods of construction and fi nish are specified, they shall be clearly stated in  the 
order.   
12 Marking. 
All metal chairs shall be legibly and indelibly mar ked with  
a) name, address/trade mark of the manufacturer; FDUS 1910-1:2018 
© UNBS 2018 – All rights reserved  5
 b) name of the product; and  
c) country of origin.    
6 © UNBS2018 – All rights reserved
 Bibliography 
IS 3499-1, Metal chairs for office purposes — Part 1: Non revo lving and non-tilting — Specification . 
 
 WDUS 1910-1 
© UNBS yyyy – All rights reserved  7
 Certification marking 
Products that conform to Uganda standards may be ma rked 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 lic ensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conj unction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation t o a product is an assurance that the goods comply w ith the 
requirements of that standard under a system of sup ervision, control and testing in accordance with th e 
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.  
 
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