PUBLIC REVIEW DRAFT DRAFT UGANDA STANDARD  
  DUS 1928 -n 
First  Edition  
2018 -mm-dd 
 
 
 Reference number  
DUS 1928 : 2018  
© UNBS 2018   
  
Road vehicles — Bus body design and construction — 
Specification  
 PUBLIC REVIEW DRAFTDUS 1928: 2018 
ii © UNBS 2018  – 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 2018  
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: +256 414 333 2 50/1/2/3 
Fax: +256 414 286 123 
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  PUBLIC REVIEW DRAFTDUS 1928:2018 
© UNBS 2018  – All rights reserved  iii 
 Contents Page  
Foreword  ................................................................................................................................................................ v  
1 Scope ...................................................................................................................................................... 1  
2 Normative references ............................................................................................................................ 1  
3 Terms and definitions (mandatory) ..................................................................................................... 1  
4 Bus classification .................................................................................................................................. 4  
4 Bus External dimensions and Weights ............................................................................................... 6  
4.1 Overall length ......................................................................................................................................... 6  
4.2 Overall width .......................................................................................................................................... 6  
4.3 Overall Height ........................................................................................................................................ 7  
5 Lighting & Illumination .......................................................................................................................... 7  
5.1 Lighting, Signaling and Indicating Systems ....................................................................................... 7  
5.1.1  External .................................................................................................................................................. 7  
5.1.2 Internal .................................................................................................................................................... 7  
5.2 Position of illumination devices .......................................................................................................... 7  
5.3 Driver Cabin lighting ............................................................................................................................. 7  
5.4 Passenger Compartment lighting ........................................................................................................ 8  
5.5 Other Area Lightings ............................................................................................................................. 8  
6 Inspection and criteria of conformity .................................................................................................. 8  
6.1 During Production ................................................................................................................................. 8  
6.2 Final Inspection ..................................................................................................................................... 8  
6 Requiremen ts ......................................................................................................................................... 9  
6.1 Conformity of production ..................................................................................................................... 9  
6.1.2  Approval of bus designs ....................................................................................................................... 9  
6.1.3  Application for approval ....................................................................................................................... 9  
4.3.3  Bus chassis frame drilling .................................................................................................................. 10 
4.4 Body sections ...................................................................................................................................... 10 
4.4.1  Body Section Properties ..................................................................................................................... 10 
4.5 Gangways ............................................................................................................................................. 12 
4.5.1  Floor to roof height ............................................................................................................................. 12 
4.5.2  Gangway measurements .................................................................................................................... 12 
4.6 Windows ............................................................................................................................................... 15 
4.6.1  Window design and constructi on ...................................................................................................... 15 
4.6.5  Compliance of window glass ............................................................................................................. 15 
4.6.6  Compliance of windscreen ................................................................................................................. 15 
4.7 Entrance doors/exits ........................................................................................................................... 15 
4.8 Service Doors ...................................................................................................................................... 15 
4.9 Emergency exits .................................................................................................................................. 16 
4.9.1  Emergency doors ................................................................................................................................ 16 
4.9.2  Emergency windows ........................................................................................................................... 16 
4.9.3  Emergency glass ................................................................................................................................. 17 
4.10  Ventilation ............................................................................................................................................ 17 
4.11  Hand-rails and hand-holds ................................................................................................................. 17 
4.12.2  Seat spacing and cushion height ...................................................................................................... 18 
4.12.3  Seat anchorage .................................................................................................................................... 18 
4.12.4  Seat belts anchorage .......................................................................................................................... 18 
4.10.4.2 ............................................................................................................................................................... 19 
Cushions ........................................................................................................................................................... 19 
4.10.4.2 ............................................................................................................................................................... 19 PUBLIC REVIEW DRAFTDUS 1928: 2018 
iv © UNBS 2018  – All rights reserved  
 Interior lighting and bell switches .................................................................................................................. 19 
4.10.4.2 ..............................................................................................................................................................  19 
Engine and cabin noise ................................................................................................................................... 19 
4.10.4.2 ..............................................................................................................................................................  19 
Height above ground and steps for passengers ..........................................................................................  19 
Emergency first aid equipment ...................................................................................................................... 20 
4.20  Locks .................................................................................................................................................... 20 
4.21  Manoeuvrability ................................................................................................................................... 20 
4.23  Protection against fire risks .............................................................................................................. 23 
4.23.3  Fuel filler holes and caps ................................................................................................................... 24 
4.24  Electrical equipment and wiring ..............................................................  Error! Bookmark not defined.  
6 Electrical Equipment and Wiring ....................................................................................................... 24 
6.1 Electrical Cables ................................................................................................................................ . 24 
6.2 Fuse ...................................................................................................................................................... 25 
6.3 Terminals, Connectors & Elements .................................................................................................. 25 
6.4 Safety requirements ...........................................................................................................................  25 
6.5 Batteries ............................................................................................................................................... 26 
6.6 Electrical Wiring and Circuits ............................................................................................................ 26 
7 Marking ................................................................................................................................................ 27 
Annex A (info rmative)  Passenge r Capacity .................................................................................................................. 28 
Annex B .................................................................................................................. Error! Bookmark not defined.  
ANNEX B (informative) .................................................................................................................................... 30 
ANNEX B ................................................................................................................. Error! Bookmark not defined.  
(Formative) ............................................................................................................. Error! Bookmark not defined.  
Bibliography  ......................................................................................................................................................... 43 
 PUBLIC REVIEW DRAFTDUS 1928:2018 
© UNBS 2018  – 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 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 given field or area and consists of key stakeholders including government, academia, consumer 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/TC ###, [name of committee] , Subcommittee SC ##, 
[name of subcommittee] . 
 PUBLIC REVIEW DRAFTPUBLIC REVIEW DRAFTUGANDA STANDARD  US 1928 -n: 2018  
 
© UNBS 2018 – All rights reserved  1 
 Road vehicles — Bus body design and construction — 
Specification 
1 Scope 
This Draft Uganda Standard specifies requirements for bus body design and construction. 
This standard applies to buses with bodies designed and constructed for carriage of persons. This standard does not include 
provisions for persons of reduced mobility. 
This standard applies to buses as defined in DUS ISO 3833. 
2 Normative references 
UNRA Vehicle Dimension Regulations 2017 and Ministry of Works: Volume 1: Volumetric Design Manual  
3 Terms and definitions (mandatory) 
For the purpose of this Uganda Standard the following definitions shall apply: 
3.1 
vehicle/bus 
vehicle with at least four wheels designed and equipped for the transport of passengers and on account of it’s 
design and appointments, is intended for carrying persons and luggage and which has more than 9 seating 
places including the driving seat. It may have one or two decks and may also tow a trailer. 
2. 2 Types of buses (refer to ISO 3833)  
2.2.1  
articulated bus or coach 
vehicle, which consists of two or more rigid sections, which articulate relative to one another. The passenger 
compartments of each section intercommunicate so that passengers can move freely between them. The rigid 
sections are permanently connected so that they can only be separated by an operation involving facilities 
which are normally only found in a workshop 
2.2.2  
low floor bus 
vehicle in which at least 35%of the area available for standing passengers (or of its forward action in the case 
of articulated vehicles) forms a single area without steps, reached through at least one service door by a 
single step from the ground 
2.2 
approval of a bus 
approval of a bus type with regard to the constructional features specified in this standard 
2.3 
Service door 
door used by passengers in normal circumstances providing access to and from the bus PUBLIC REVIEW DRAFTDUS 1928: 2018 
2 © UNBS 2018  – All rights reserved  
 2.4 
Double door  
door affording two, or the equivalent of two access passages 
2.5  
Emergency door  
door additional to the service door(s) intended for use as an exit by passengers in an emergency only 
2.6  
Emergency window 
window, not necessarily glazed, intended for use as    exit by passengers in an emergency only 
2.7 
double emergency window 
an emergency window which, when divided into two by an imaginary vertical line (or plane),exhibits two part s 
each of which complies as to dimensions and access with the requirements applicable to a normal emergency 
window 
2.8 
escape hatch 
roof provision intended for use as an exit by passengers in an emergency only 
2.9 
Emergency exit 
an emergency door, emergency window or escape hatch 
2.10 
exit 
Means a service door or emergency exit 
2.11 
floor or deck 
That part of the body work whose upper surface supports standing passengers, the fee to seated passengers 
and the driver and these at mountings 
2.12 
gangway 
The passage providing access to passengers from any seat or row of seats to any other seat or row of seats 
or to any access passage from or to any service door; it does  not include: 
a) the space extending 30cm in front of any seat; 
b) the space above the surface of any step or stair case; or 
c) any space, which affords access solely to one seat or one row or seats. 
3.13 
access passage 
The space extending inwards into the vehicle from the service door up to the outermost edge of the upper 
step( edge of the gangway).Where there is no stepatthe door,the space to be considered as access 
passageshallbeuptoadistanceof30cmfromtheseatingpositionoftheinnerfaceofadualpanel. 
3.14 
driver’scompartment  
the space intended for the driver’s exclusive use and containing the driver’s seat, the steering wheel, controls 
,instruments and other devices necessary for operation of the bus. PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  3 
 3.15 
Tare mass(MK)(kg) 
The mass of the bus in running order un occupied and un-laden 
NOTE1:Unless otherwise stated,allmeasurementsshallbemadewhenthebusisatitsunladenkerbmass(MK)(kg)anditis 
standing on a smooth and horizontal ground surface. If a kneeling system is fitted to the vehicle, it shall not be in 
operation. 
3.16 
technically permissible maximum mass 
The maximum mass declared by the manufacturer of the bus. 
(Thismassmaybegreaterthanthe“permissiblemaximummass”tobeprescribedbynationaladministrations)  
NOTE2: Wherever there is a requirement in this standard for a surface in the bus to be horizontal or at specific angle when 
the vehicle is at its un laden kerb mass ( MK) (kg), in the case of a bus with mechanical suspension, the surface may 
exceed his slope or possess a slope when the bus is in the loading condition declared by the manufacturer. If a kneeling 
system is fitted to the vehicle, it shall not be in operation. 
317 
technically permissible maximum axle mass 
That part of the technically permissible maximum mass of the bus, declared by the manufacturer, which 
results in the vertical force at the road surface in the contact are a on the wheel/wheels of an axle. This mass 
maybegreaterthanthemaximumpermissibleaxlemassauthorizedbynationaladministrations. The sum of all 
technicallypermissiblemaximumaxlemassesofthebusmaybegreaterthanthetechnically permissible maximum 
mass of that bus 
3.18 
passenger 
person other  than the driver or a member of the crew 
3.19 
passenger with reduced mobility 
A passenger who has a special difficulty when using public transport, especially elderly and disabled 
person.Reducedmobilitydoesnotnecessarilyimplyanyformofmedicalimpairment 
3.20 
passenger compartment 
The space intended for passengers use excluding any space occupied by fixed appliances such as bars, 
kitchenettes or toilets 
3.21 
automatically operated service door 
power- operated service door which can be opened (other than by means of emergency controls)only 
afteracontrolisoperatedbyapassenger,andafteractivationofthecontrolsbythedriver,andwhichcloses again 
automatically 
3.22 
motion prevention device 
device, which prevents the bus from being driven away from rest when a door is not fully closed; 
3.23 
driver operated service door 
service door, which normally is opened and closed by the driver 
3.24 
RHS 
rectangular hollow section PUBLIC REVIEW DRAFTDUS 1928: 2018 
4 © UNBS 2018  – All rights reserved  
 3.25 
M.S 
Mild Steel 
3.26 
can trail 
Longitudinal stiffeners that provide support over the windows of the b us 
3.27 
MIG 
Metal inert gas 
3.28 
TIG 
Tungsten inert gas 
3.29 
MMAW  
manual metal arc  
3.30 
CIDECT 
The International Committee for Research and Technical Support for Hollow Section Structures 
3.31 
ASI 
Australian Steel Institute 
3.32 
Kerb mass/Tare mass/kerb weight 
weight of your tow vehicle when initially delivered by the manufacturer (with no occupants, ‘cargo’ or other 
accessories)  
 
3 Categorization of Buses 
. A “bus Category” means buses which do not differ in the following essential aspects  
1. Vehicle Concept ( Designed Capacity- The number of Passengers) 
2. Body work type and  Concept (Single, double deck, Low flow , articulated body concept 
3. Vehicle Purpose or use (Urban, interurban , Long distance) 
3.1 Bus Types 
This categorization is based on function: 
3.1.1 Urban Bus  : A bus which is designed and equipped for Urban and Sub-urban use; this 
class of vehicle has seats and places intended for standing passengers and allows for the 
movement of passengers corresponding to frequent stops.  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  5 
 3.1.2 Inter-Urban Coach : A bus which is designed and equipped for Interurban transport. This 
vehicle has no place which is specifically intended for standing passengers, but it can carry 
standing passengers for short distances in the gangway. 
3.1.3 Long Distance Coach : A bus which is designed and equipped for long distance journey; 
this vehicle is concerned with the comfort of its seated passengers and standing Passengers 
are not carried. 
3.1.4 Articulated bus  or coach is a vehicle, which consists of two or more rigid sections, which 
articulate relative to one another. The passenger compartments of each section 
intercommunicate so that passengers can move freely between them. The rigid sections are 
permanently connected so that they can only be separated b y an operatio n involvin g facilities 
which ar e normall y only found in a worksho p. 
3.1.5 Trolley bus:  A bus which is electrically propelled by energy from external overhead 
contact wires. 
3.1.6 Low Floor Bus: A vehicle which has at least 35 percent of the area available for 
standing passengers 
3.1.7 Double Deck Bus : Means a vehicle where the provided spaces for passengers are 
arranged, at least in one part in two superimposed levels and spaces for standing 
passengers are not provided in the upper deck. 
3.1.8 : Special bus : A bus whose characteristics are included in none of the above 
categories: Special buses may include;  Sleeper coach, school bus, transport bus,  
Ambulances, off-road bus , Specially constructed buses for  Prisons, Police or Armed 
forces. 
3.2 Bus Classes;  
This categorization is based on the seating capacity: 
Class I:  Micro-buses with a seating capacity of up to14 passengers; This includes a 
category of Light omni buses as defined in the traffic and road safety Act of 1998 
Class II:  Mini-buses with a seating capacity of 15 —25 passengers; This includes a 
category of Light and medium omni buses as defined in the traffic and road safety act of 
1998 
Class III:  Medium-buses with a seating capacity of 26 —40 passengers; This includes a 
category of  medium omni buses as defined in the Traffic and road safety Act of 1998. PUBLIC REVIEW DRAFTDUS 1928: 2018 
6 © UNBS 2018  – All rights reserved  
 Class IV:  Buses with a seating capacity of over 40 passengers; This includes a category of 
medium omni Buses and heavy omni buses as defined in traffic and road safety act of 
1998.  
Class V:  Urban buses with a capacity of over 40 seated passengers; This includes a 
category of medium omni Buses and heavy Omni buses as defined in traffic and road 
safety act of 1998.  
Class VI:  Double decker buses with a capacity of over 40-seated passengers. 
Note:  
i. Any of the above bus classes shall fall under one or more bus types already presented and 
vice versa 
ii.  The carrying capacity shall also conform with the provisions of the traffic and road safety 
act  
 
Bus Categorization 
4 Bus External dimensions and Weights 
4.1 Overall length 
The overall length of the bus, if rigid, including any load, shall not exceed 12,500 mm. the overall length of the 
bus if articulated, shall not exceed 17 400 mm; or the overall length of any combination of buses (presented 
as one vehicle) shall not  exceed 22 000 mm. 
4.2 Overall width 
The overall width of any bus body shall not exceed 2.65 excluding side mirrors. 
PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  7 
 4.3 Overall Height 
The overall height of the highest point of the bus, including any load shall not exceed 4.3 meters from the 
surface of the road. 
All provisions regarding vehicle dimensions and weights as specified in the UNRA Vehicle Dimension 
Regulations and subsequent revisions shall apply.   
5 Lighting & Illumination 
5.1 Lighting, Signaling and Indicating Systems 
5.1.1 External 
External lighting and light-signaling devices of the bus shall comply with the chassis frame manufacturers 
specification for the external lighti ng. 
All lighting and light- signaling devices shall be Type Approved”  
5.1.2 Internal 
Lighting and light-signaling devices shall provide adequate illumination inside the bus for the safe operation by 
the driver and the passengers, during darkness and other conditions of reduced visibility. 
5.2 Position of illumination devices 
The following lamps are to be placed on the roof of the bus, above the head of the observer 
a) Cab lamp or courtesy lamp 
b) Passenger area lamps 
The following lamps are to be placed at door apertures  
a) Exit lamps 
The following lamps are to be placed inside the compartment/ unit/control 
a) Locker lamp 
b) Electrical distribution centre lamp - Instrument lighting 
c) Control unit lamps 
5.3 Driver Cabin lighting 
The following lamps fall in this category: 
a) Cab lamp or courtesy lamp 
b) Locker lamp 
c) Electrical distribution lamp PUBLIC REVIEW DRAFTDUS 1928: 2018 
8 © UNBS 2018  – All rights reserved  
 The lighting devices used for cabin interior should be sufficient enough for clearly distinguishing each 
component part of the cabin. The driver should be in a position to read signages written on the walls, door of 
the cabin. He should also be in position to read any instructions printed on paper. 
The luminous flux of all the lamps provided for cabin lighting to light up the equipment, components and to 
read, shall not be less than 30 lux and shall not be more than 150 lux, when measured at 500 mm above the 
driver seat base. 
The driver’s compartment shall be provided with illumination through separate circuit.  
5.4 Passenger Compartment lighting 
The following lamps fall in this category:- 
a) Exit la mps 
b) Passenger area lamps 
The lighting devices used for passenger area should ensure reading of signages inside the passenger area 
and other important signs like emergency signs. The illumination should light up handles, latches, knobs, rods, 
hand-holds, etc facilitating easy access to passenger. The illumination should be adequate for reading printed 
matter by the passenger. 
The illumination of these lamps shall not be less than 50 lux, when measured at any seating location of the 
bus and at 500 mm above the seat base. 
At least two night lights shall be provided in the passenger compartment of all buses. The interior lighting shall 
be designed such that the glare and reflections caused does not affect the driver.”  
5.5 Other Area Lightings 
Luggage hold area lighting: Every luggage hold shall be provided with light fittings for illuminating the hold 
when in use. 
Destination panel lighting: The front, rear and side (optional) of the vehicle shall be illuminated or self-
illuminated (e.g. LED based destination boards) in such a way that the inscription on the panel/board shall be 
visible at a distance of 30 metres. 
Side marker lamp: These are to be mounted on the side of the vehicle and shall be of amber colour. They 
shall be mounted on a height of 250 – 1500 mm above the ground. 
6 Inspection and criteria of conformity 
6.1 During Production 
Every bus shall be inspected by an engineer accredited by the Ministry of works and Transport or any 
recognized Engineering professional boby at end of the framing stage, for the integrity of the welding and 
materials used in the building of the frame and the body. They will sign for conformity of this frame, using the 
form in annex B  
6.2 Final Inspection 
Every bus shall have an approval mark, in the form of plate, issued by the relevant Government Authority as 
prescribed in this standard after undergoing sufficient random inspection. Approval granted shall be withdrawn 
if this requirement is not complied with and production discontinued.  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  9 
 Every bus shall be inspected in accordance with the requirements of US 479, code of practice for inspection of 
road vehicles. A bus shall be inspected with all parts and accessories in place. The accredited engineer shall 
sign for conformity, using the form in annex B.  
7 Requirements 
7.1 Conformity of production 
7.1.1 Accreditation of body builders  
All body builders shall be accredited by the Ministry responsible for Transport. 
7.1.2 Approval of bus designs 
Approvals for vehicle designs shall be done by Ministry responsible for Transport. 
7.1.3 Application for approval  
Application for approval of a vehicle type, with regard to its constructional features, shall be submitted by the 
vehicle body builder to Ministry responsible for Transport 
7.1.3.1  The application shall include a detailed description of the vehicle type, its structure, dimensions, 
configuration, and constituent materials. The following shall also be submitted: 
a) drawings of the bus and its interior arrangements; 
b) the unladen mass of the bus in kg; 
c) the intended total number of passengers (N) as calculated in Annex A; 
d) the class and type for which approval is requested.  
NOTE This approval is deemed valid for the submitted design, any variations to the designs shall see re-approval. 
7.2 Bus shall be built by approved body builders in accordance with requirements of this standard and shall 
conform to 4.1.4.3 Drilling and welding of chassis (welding standard) 
7.2.1 Attachments to the chassis frame. 
a) The body structures shall not be welded to the chassis frame .  
b) Brackets shall be bolted to the chassis frame   in line with vehicle manufacture’s specifications.  
7.2.2 Welding of body structure and cladding  
7.2.2.1 Welding Types 
Arc welding shall be limited to the welding of angle iron or channel iron sections in excess of 6mm, to chassis 
mounting brackets. 
The MIG and TIG equipment shall be employed for welding all other material including RHS, lip channel and 
cladding sheets. PUBLIC REVIEW DRAFTDUS 1928: 2018 
10 © UNBS 2018  – All rights reserved  
 7.2.2.2 Welders 
Welders shall be required to have a welders certificate from an accredited institution by a local/internationa l 
certification. 
7.3. Bus chassis frame drilling 
Drilling shall follow the chassis frame manufacturer’s recommendations and shall achieve a "push fit" with the 
fixings employed. 
7.4 Body sections 
The materials used shall be Q345 or equivalent and dimensions of body sections shall be as specified in 
Table1, 
7.4.1 Body Section Properties 
For the required section properties and dimensions to use during the design and construction of bus body, the 
Limit State Design method is to be used basing on the maximum design load application during service or 
use.  
7.4.1.1  Hollow Sections 
With the limit service loads determined , the Hollow Sections dimensional and profile properties shall be 
referenced from the Design Capacity Tables for Structural Steel for Hollow Sections (Design Guide 6 and 7) 
by CIDECT or any equivalent standard.  
7.4.1.2 Channel Sections 
Channel Section dimensions and profile properties shall be selected and used with reference to the Design 
Capacity Tables for Structural Steel for Open Sections by ASI or any equivalent standard 
7.4.1.3 Joinery Method 
For assembly and fabrication method guidance use CIDECT Design Guide 7 or any equivalent while for the 
welded joints that are operating under fatigue and static loading use CIDECT Design Guide 8. 
Body 
sections  Class II, III  Class IV,V,VI  
Body cross 
members   As a minimum RHS 100 mm x 50 mm x 3 mm shall 
be used  
Rectangular Hollow Section or Square section with 
properties to withstand maximum design load 
application in 4.4.1  and dimensional properties 
referenced to structural standard in  section 4.4.1.1 
shall be used with approval by a qualified structural 
engineer  
For joinery method refer to section 4.4.1.3  As  minimum a RHS 100 mm x 50 mm x 6 mm 
shall be used  
I Channels with properties to withstand maxim um 
design load application in 4.4.1  and dimensional 
properties referenced to structural standard in 
section 4.4.1.2 shall be used with approval by a 
qualified structural engineer  
For joinery method refer to section 4.4.1.3  
Seat 
Anchorage  
Side verticals  
Side 
horizontals  RHS 50mm x 50mm x 1.5mm or SHS 50mm x 
25mm x 1.5mm as a minimum shall be used.  
Rectangular Hollow Section or Square section with 
properties to withstand maximum design load 
application in 4.4.1  and dimensional properties 
referenced to stru ctural standard in  section 4.4.1.1 
shall be used with approval by a qualified structural 
engineer  RHS 50mm x 50mm x 3mm or SHS 50mm x 25mm 
x 3mm as a minimum shall be used.  
Rectangular Hollow Section or Square s ection with 
properties to withstand maximum design load 
application in 4.4.1  and dimensional properties 
referenced to structural standard in  section 4.4.1.1 
shall be used with approval by a qualified structural 
engineer  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  11 
 For joinery method refer to section 4.4.1.3  For joinery method refer to sectio n 4.4.1.3  
Floor 
covering                     3.0mm Mild Steel. chequerplate  
2.5mm Mild Steel. (flat) plate with anti -skid covering  
10mm Marine ply with floor covering  
Window 
Spacing  
 Minimum: 940 mm  
Maximum: 1150 mm  
Window 
height  Sliding: 600 mm  
Fixed : 430 mm  
Sliding 
window 
position  Top position for all school buses and either position for other applications(see Figure2)  
Cant Rail  Define structural mechanism using any appropriate proven scientific method to define the loading 
application and select a ppropriate section as guided by section 4.4.1.1 & 4.4.1.2  
Perform structural analysis for the design and make necessary changes with consultation and approval 
by a qualified structural engineer  
Roof Arches  
Roof 
Longitudinal  Define structural mechanism usi ng any appropriate proven scientific method to define the loading 
application and select appropriate section as guided by section 4.4.1.1 & 4.4.1.2  
Perform structural analysis for the design and make necessary changes with consultation and approval 
by a qu alified structural engineer  
For joinery applications please refer to section 4.4.1.3  
Outer 
cladding  0.5 mm Mild Steel Galvanized ( glued skin)  
0.8 mm Mild Steel Galvanized (welded skin)  
1mm Aluminum plate  
Inner 
Cladding  0.5 mm Mild Steel Galvanized ( gl ued skin)  
0.8 mm Mild Steel Galvanized (welded skin)  
0.8 mm Aluminum plate  
Note: Shall have full coverage with no sharp edges.  
A Pillar  
B Pillar  
Window Rail  
Skirt Rail  Rectangular Hollow Section or Square section with properties to withstand maximum servi ce lateral and 
axial loading as a minimum shall be considered.  
Dimensional properties cross referenced with structural standard in  section 4.4.1.1 shall be used with 
approval by a qualified structural engineer  
For joinery applications please refer to sect ion 4.4.1.3  
Diagonals  Rectangular Hollow Section or Square sections shall be designed as zero force members  
For joinery applications please refer to section 4.4.1.3  PUBLIC REVIEW DRAFTDUS 1928: 2018 
12 © UNBS 2018  – All rights reserved  
 Table1—Material and dimensions of body sections 
.  
 
 
 
Design V ehicle Type  Height  Width  Length  Minimum Design 
Turning Radius (m)  Minimum Design 
Inside Radius (m)  
Class I  1.3-1.5 Up to 2.1  Up to 5.8  7.3 4.2 
Class II, III  Up to 4.1  Up to 2.6  Up to 9.1  12.8 8.5 
Class IV, V , VI  
Up to 5  Up to 2.6  Single unit 12.5  
Articulated 17.m  
Joined up to 22  
 12.8 7.4 
 
7.5 Gangways 
7.5.1 Floor to roof height 
The minimum inside floor to roof height for bus classes (as specified in clause 3) II and III shall be minimum 
1700mm, while for buses of classes IV, V and VI shall be minimum 1900mm .  
7.5.2 Gangway measurements 
The gangway for public service vehicle shall be so designed and constructed as to permit the free passage of 
gauging devices whose dimensions are as specified in Table 2 and as illustrated in Figure1. 
Table2 — Gangway measurements in mm 
Dimensions  ClassII  ClassIII  Class  IV,V and VI 
PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  13 
 Diameter of lower cylinder  305 350 450 
Height of lower cylinder  900 900 900 
Diameter of upper cylinder  356 550 550 
Height of upper cylinder  500 500 500 
Overall height  1700  1800  1900  
Buses of class VI shall conform to clau s 33 (2) of the Traffic and Road Safety Act which states that ‘no part of 
any gangway which serves as a joint means of access from any entrance to both an upper and a lower deck 
of a bus shall be less than 915mm in width PUBLIC REVIEW DRAFTDUS 1928: 2018 
14 © UNBS 2018  – All rights reserved  
 
 
Figure 1 —Gangway gauging device 
 PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  15 
 7.6 Windows 
7.6.1 Window design and construction 
The recommended windows design for buses of class I, IV, V and VI shall be made of three parts, as shown in 
the Figure 2. Window dimensions shall be as specified in Table 1. (research on window design) 
 
Figure 2 Typical window design 
7.6.2 The windows shall be fixed to the vertical pillars firmly 
7.6.3 Window fittings shall be of good quality and weather proof. 
7.6.4 The windows shall be so designed and constructed as to allow proper view and ventilation. 
7.6.5 Compliance of window glass 
Window glass and windscreens shall comply with the Specification in the Traffic and road safety Act for 
automotive windscreens. 
7.6.6 Compliance of windscreen 
7.6.6.1  The windscreen and side- windows of the driver’s compartment shall be constructed as to give the 
driver adequate view ahead and to either side at an angle of atleast 90º from the centre line of the vehicle. 
7.6.6.2  The corner posts and pillars supporting the windshield shall be 100mm max. and 50mm max 
respectively. They shall be so designed and constructed such that they do not im pair driver’s visibility as in 
4.6.6.1. 
7.7 Entrance doors/exits 
Entrance and exits of the vehicle shall be through service door(s) or double door(s) situated on the left side of 
the vehicle, whose minimum height for class II, III and IV shall be 1650mm, and for class V, 1800mm while the 
minimum width for single door shall be 450mm and for double shall be1200mm. 
7.8 Service Doors 
The minimum number of service doors required is as follows: 
a) class V and VI vehicle shall have minimum two double doors; 
b) class III and IV shall have minimum one service doors.  PUBLIC REVIEW DRAFTDUS 1928: 2018 
16 © UNBS 2018  – All rights reserved  
 
7.8.1 Entrance and service doors shall not be deemed to be an emergency door 
7.9 Emergency exits 
All vehicles shall be provided with at least one unhindered emergency exit with a clearly marked direction of 
opening.  
7.9.1 Emergency doors 
Emergency doors shall be clearly marked and capable of being opened from inside and from outside when the 
vehicle is stationary.  
7.9.1.1  Emergency doors shall not be of the power- operated or the sliding type. 
7.9.1.2  Emergency doors shall be installed in the normally closed position.  
7.9.1.3  Emergency doors located at the back of the vehicle shall have an opening of height not less than 
1250mm and width not less than 550mm or an area of 690000sq mm.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure3—Doors 
7.9.2 Emergency windows 
7.9.2.1  Emergency windows shall be rectangular, measuring 700mm x 500mm minimum or an area of 
350000sq mm. PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  17 
 
7.9.2.2  Every hinged emergency window shall open outwards. 
7.9.2.3  Every emergency window shall be capable of being easily and instantaneously operated from 
inside and from outside the bus by means of a device recognized as satisfactory by the authority,  
7.9.3 Emergency glass 
An emergency exit door/window made of glass shall comply with the dimensions described above in clause 
4.9.2.1 and 4.9.2.2 and shall be made of breakable safety glass  This shall present the possibility of using 
panes of laminated glass or plastic material 
7.10 Ventilation 
Every bus shall be fitted with suitable ventilation constructed such that it shall under normal use, not leak rain 
water into the vehicle. 
7.11 Hand-rails and hand-holds  
Every urban bus belonging to class III, IV, V and VI shall be provided with hand-rails and hand-holds which 
are of adequate strength and so designed and installed as to present no risk of injury to passengers. Every 
hand-rail shall provide a length of at least 100mm to accommodate a hand. The hand-rails shall have a 
diameter greater than 20mm and less than 45mm except for hand-rails on doors and seats 
A hand rail shall be able to withstand without snapping a traction force of 1400N applied statically in the 
direction of application to the centre surface of the hand rails between the two supportive successive support 
points. 
7.12 Passenger seats (including folding seats and space for seated passengers)  
7.12.1 Minimum seat width shall be as specified in Table 3 and as illustrated in Figure 4. 
 F minimum G minimum 
  Continuous seats Individuals eats 
Class IV and V 200 225 250 
ClassIII 200 225 250 
ClassII 225 225 250 
Table3—Minimum seat width in mm 
 
 
 
 
 
 
 
 PUBLIC REVIEW DRAFTDUS 1928: 2018 
18 © UNBS 2018  – All rights reserved  
 
 
 
Figure4 — Width of passenger seats 
7.12. Seat spacing and cushion height 
The minimum seat spacing for leg room shall be 660mm for class V and VI, while for other classes the 
minimum seat spacing shall be 680mm, when the seats are arranged one behind the other as illustrated in Fig 
5. 
7.13 Seat anchorage 
The seats shall be firmly bolted on the floor steel frame and not on floor sheets with bolts complying with US 
ISO 898.The general seat construction shall be as stated in Figure 5. The tubes used in the construction of 
seats shall be round or oval shaped and of minimum 25mm diameter and minimum 2mm thickness and of 
grade A. 
 
 
 
 
 
 
 
 
Where  
H seat spacing 
I Cushion height  
Figure5—Seat spacing and cushion height 
7.14 Seat belts anchorage 
The seat belts and their anchorage fitted in bus class ll meet the requirements specified in US 546  
Specification for seat belt assemblies for motor vehicles and US 545, Specification for anchorages for seat 
belts — Automobiles. 
All buses shall be provided with 3- point seat belts for the driver’s seat, the co- driver’s  seat as shown in Figure 
6. The other seats may be provided with 2-point seat belts. 
 
 PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  19 
 
 
 
 
 
Figure 6—Seat belt anchorage for vehicles  
7.14.1 All other classes of vehicles shall be provided with seat belts for each seat. 
7.15 Cushions 
If used, cushions for the seat and backrest shall be made of high-density foam conforming to US 202- 2, 
Specification for flexible polyurethane foams. 
The combination of the plywood and foam must be reinforced with steel sections or flat bar of 25 mm x 3 mm. 
7.16 Interior lighting and bell switches  
All vehicles shall have interior lights operated by the driver and passengers. All vehicles shall also have at 
least two bell switches, operated by the passengers to alert the driver to stop. The bell switches shall have a 
minimum distance of 300 mm from the driver’s partition and 610 mm from the rear . 
7.17 Engine and cabin noise  
Non-flammable sound-proof material (s), which are not liable to be impregnated with fuel or lubricant,shall be 
used in the engine compartment for noise reduction. 
Vehicles shall be constructed such that engine noise shall be limited to 90 decibels inside the vehicles.  
7.18 Height above ground and steps for passengers 
The lowest step for entering into the vehicle shall not exceed a height of 460 mm from the ground. D shall be 
the  height above the ground  of vehicle unladen as shown in Fig 7 PUBLIC REVIEW DRAFTDUS 1928: 2018 
20 © UNBS 2018  – All rights reserved  
  
Figure7—Height above ground and steps for passengers 
7.19 Emergency first aid equipment 
Space shall be provided for fitting one or more first aid. The space provided shall be not less than 7 dm3; the 
minimum dimension shall be not less than 80 mm. 
Every vehicle shall be provided with a fully equipped first aid box with expiry dates clearly indicated. 
7.20 Locks  
Every vehicle shall be fitted with quality passenger door locks, boot locks and window locking devices shall 
hold the window firmly preventing it from sliding.  
7.21 Manoeuvrability 
7.21.1 The bus shall be able to manoeuvre on either lock, inside a circle of 12.5 m radius, without any of 
its outermost points projecting outside the circumference of the circle.  
7.21.2 When the outer points of the bus are moving on either lock on a circle of 12.5 shall be able to  
move within the limits of a circular ck 7.2 m wide (see Figure  8).  
 
PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  21 
 
 
Figure 1: Class I 
 
Figure 2: Class II, III and IV 
 PUBLIC REVIEW DRAFTDUS 1928: 2018 
22 © UNBS 2018  – All rights reserved  
  
 
Figure 3: Class IV, V and VI PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  23 
 
 
Figure8—Vehicle manoeuvrability 
7.23 Protection against fire risks 
A partition of heat-resistant and shielding material (s) shall be fitted between the engine compartment or other 
source of heat and rest of the vehicle. 
7.24 Fuel tanks 
Fuel system assembly shall be in accordance with US??? , Recommendation for fuel tank assembly for 
automotive. 
Every fuel tank shall be securely fixed. No part of a fuel tank shall be less than 600 mm from the front of the 
bus or less than 300  mm from the rear bus so as to provide protection in the event of front or rear impact. 
No part of the fuel tank shall project beyond the overall width of the bodywork. PUBLIC REVIEW DRAFTDUS 1928: 2018 
24 © UNBS 2018  – All rights reserved  
 Fuel tanks shall be made so as to be corrosion resistant. 
7.25 Fuel-feed systems 
No apparatus used for the fu el feed shall be placed in the driver’s compartment or the passenger 
compartment. 
Fuel lines and all other parts of the fuel-feed system shall be accommodated in the positions on the bus where 
they have the fullest protection. 
Twisting or bending movements and vibrations of the bus structure or the power unit shall not subject the fuel 
lines to abnormal stress. 
7.26 Fuel filler holes and caps 
7.27 Fuel filler holes shall be accessible only from outside the vehicle. 
7.27.1 Fuel filler holes shall be not less than 500 mm from any door aperture when the fuel tank is 
intended to contain petrol, and not less than 250 mm when it is intended to contain diesel fuel; they shall 
moreover not be i n the passenger compartment, nor in the driver’s compartment. Fuel filler hole caps shall be 
so designed and constructed that they cannot be opened accidentally. 
7.28 Fire extinguisher 
Space shall be provided for fitting one or more fire extinguishers, such that one is near the driver’s  seat and 
the space provided for each measuring not less than 600 mm x 200 mm x 200 mm.  
8 Electrical Equipment and Wiring 
8.1 Electrical Cables 
All cables used shall be compliant with ISO 6722 and shall be able to withstand working temperature up to 
70°C. 
All the cables shall be ducted and secured at suitable places in such a manner that during normal use of 
vehicle the cables are not subjected to any tension, stretching, and nicking, cutting, abrasion or chaffing. 
The conductor cross section shall be selected to carry the rated current as given below (Specification for Low 
Tension Wire for Automotive Application) or according to one of the standards mentioned above. 
Allowable Current (A)  Number/ 
Diameter of 
wire in (mm)  Cross 
Sectional Area 
in (mm2)  Outer 
Diameter (mm)  Finished Outer 
Diameter (mm)  
9 7/0.32  0.5629  1.0 2.2 
12 11/0.32  0.8946  1.2 2.4 
15 16/0.32  1.267  1.5 2.7 
20 26/0.32  2.081  1.9 3.1 
28 41/0.32  3.287  2.4 3.8 
 
Specification for Low Tension Wire for Automotive Application  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  25 
 Single -core, untinned, PVC -insulated. Permissible working temp erature: 70oC.2)  
Nominal 
conductor cross - 
sectional area  
mm2  Approx. 
number of 
individual 
strands1)  Maximum 
impedance per 
meter1) at + 20oC  
 
m Ω/m  Maximum 
conductor 
diameter 1)  
 
mm Nominal 
thickness of 
insula - tion1)  
 
mm Maximum 
external diameter 
of insul ated wire1)  
mm Permissible  continuous  
current (guide figure)2) at ambient 
temperature of  
+ 30oC  
 
A + 50oC  
 
A 
1 32 18.5 1.5 0.6 2.7 19 13.5 
1.5 30 12.7 1.8 0.6 3.0 24 17.0 
2.5 50 7.60 2.2 0.7 3.6 32 22.7 
4 56 4.71 2.8 0.8 4.4 42 29.8 
6 84 3.14 3.4 0.8 5.0 54 38.3 
10 80 1.82 4.5 1.0 6.5 73 51.8 
16 126 1.16 6.3 1.0 8.3 98 69.6 
25 196 0.743  7.8 1.3 10.4 129 91.6 
35 276 0.527  9.0 1.3 11.6 158 112 
50 396 0.368  10.5 1.5 13.5 198 140 
70 360 0.259  12.5 1.5 15.5 245 174 
95 475 0.196  14.8 1.6 18.0 292 207 
120 608 0.153  16.5 1.6 19.7 344 244 
1) To DIN ISO 6722, Part 3. 
2) To DIN VDE 0298, Part 4. 
Table 1. Electrical copper conductors for motor vehicles 
8.2 Fuse  
Every electrical circuit shall be provided with fuse designed for the circuit. In case of multiple circuits a 
common fuse shall be permitted, subjected to suitable current capacity per circuit depending upon the 
individual electric load. 
The current carrying capacity of the fuse shall be: 
Rated Current of Fuse =1.5 times the Load Current of the Electrical Equipment 
8.3 Terminals, Connectors & Elements 
End terminations: All the ends shall be suitably crimped with lugs/soldered or fixed so as to withstand vehicle 
vibrations. 
The interconnection shall be through couplers/junction boxes/ terminal blocks. 
Suitable connectors shall be used for external areas which are exposed to atmosphere to avoid water 
/moisture ingress during use. 
8.4 Safety requirements 
Use of relays and other electrical elements shall be adopted where the current rating of the switches is not 
adequate. PUBLIC REVIEW DRAFTDUS 1928: 2018 
26 © UNBS 2018  – All rights reserved  
 The additional circuits shall not draw current more than specified by the manufacturer. 
Where the voltage exceeds 100 Volts RMS (Root Mean Square) in one or more electrical circuit, a manually 
operated isolation switch which is capable of disconnecting the circuit(s) from the main electrical supply shall 
be provided and shall be located inside the vehicle. Alternatively, electrically operated battery cut off switch 
may be provided.”  
No circuit provided by the vehicle manufacturer or type approved shall be modified. 
The isolation circuit shall have provision for bypassing circuits supplying mandatory external vehicle lighting 
i.e. besides the main isolation switch, individual isolation switches shall be used in series with main isolation 
switch, each for internal lighting and external mandatory lighting. 
Electrical cables shall be located such that no part can make contact with any fuel line or exhaust system 
subjected to excess heat. Suitable special insulation shall be provided where such electrical circuits are 
necessary. 
Electrical conductors shall meet the requirement for flame resistance specified in paragraph 6.8. 
8.5 Batteries 
All batteries shall be well secured and easily accessible. 
The battery compartment shall be separated fr om the passenger compartment and if provided in driver’s 
compartment, it shall be covered and well ventilated. 
Battery terminals shall be protected against short circuit risk. 
Isolation Switch: A manually or electrically operated isolation switch, which is capable of disconnecting the 
battery terminal from the electrical circuit, shall be provided. 
8.6 Electrical Wiring and Circuits 
The circuit diagram for the bus provided by OE vehicle manufacturer shall not be tampered”  
Description  Standard No.(Local or I nternational)  
Cables for Motor Vehicles  IEC 60793  
Cable Termination for Automobile Wiring Blade Type 
Connectors  TBD 
Cable Termination for Automobile Wiring Bullet & Tube Type 
Connectors  TBD 
Low Voltage Fuses  IEC 60269  
Colour Code of Electrical Wiring for major electrical circuits  IEC 60757  
Cartridge Fuse links for Automobiles  IEC 60127 -2 
Porcelain (Molded) Fuse links for Automobiles  TBD 
Fuses for Automobiles  TBD 
Piano key type switches for use in automobiles  TBD 
Automobile Lamps  IEC 60598  
Electri cal Circuits  IEC 60364 -1 
*as amended from time to time.  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  27 
 Table: Standards Related to Electric Equipment & Wiring 
7 MarkingThe following information shall be legibly and indelibly marked on a plate permanently affixed on 
the side of the bus body: 
a) manufactu re/body builder’s name, address and trade mark;  
b) year of manufacture; 
c) capacity;  
d) serial number; 
e) reference to this standard PUBLIC REVIEW DRAFTDUS 1928: 2018 
28 © UNBS 2018  – All rights reserved  
 Annex A 
(info rmative) 
 
Passenger Capacity 
A1 There shall be on the vehicle a number(Ps)of seating places other than folding seats,which conform to 
this standard. If the vehicle is of class V and IV, the number Ps shall be at least equal to the number of square 
metres of floor available for passengers and crew(So) rounded down to the nearest whole number ;the 
required number may be reduced by10% in the case class V vehicles(0.9So) 
A 2 The total number of seats N seating and standing in the vehicle shall be calculated such that both of 
following conditions are fulfilled: 
                                         
spssspN1  
And                               
QRVVL MV MTNX.  
where, 
Ps         =          number of seating places; 
S1          =         surface area(m2) available for standing passengers; 
Ssp        =         areas sumed for one standing passenger (m2/standing passenger);  
MT   =          technically permissible maximum mass 
MV = unladen mass(kg)asdefinedin2.16.1; 
L= specific load of baggage(kg/m2) in the baggage compartment(s);  
V = total volume(m3) of the baggage compartments; 
R   = specific mass of baggage in the roof area(kg/m2);  
VX = total surface area(m2) available for baggage to be carried on the roof; 
Q  = mass(kg) as summed for the load on each passenger s eatin g and st anding place, i f any In the case  
 
of ClassIII,vehiclesS1=0.  
 
A3 The values of Q, S sp, L and R for every class of vehicle areas follows 
Class  Q(kg)  Ssp(m2/standing  
passengers  L (kg/m3)  R (kg/m2)  
II 711) 0.150  100 75 
III 711) (Nostanding 
passengers)  100 75 
1)Including3kgofhandbaggage.  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  29 
  
 PUBLIC REVIEW DRAFTDUS 1928: 2018 
30 © UNBS 2018  – All rights reserved  
 ANNEX B 
(informative) 
(To be submitted by the Vehicle Manufacturer / Body Builder to the Ministry of Works and Transport) 
Table: Document History 
Test Agency  Vehicle Manufacturer / Body  
Builder  Document No. (indicating also  
revision status)  
Signature  
 Signature   
Name  Name  
  
Designation  
 Designation   
Date  Date   
 
Table: Technical Specifications 
1.0 Details of Bus Builder/ Manufacturer  
1.1 Builder's/ Manufacturer’s name & address:  
1.2 Telephone No :  
1.3 E mail address :  
1.4 Contact person :  
1.5 Name of model and variants :  
1.7 Type and General co mmercial description (s) :  
 
2.0 Vehicle Chassis Characteristics  
2.1 Chassis types approved for Body installation :  
2.2 Type of Control (normal control/Full forward control etc.) :  
2.3 Wheel base (s) :  
2.4 Number of Axles and wheels :  
2.5 Chassis (ov erall drawing) :  
2.6 Frame Type :  
2.7 Cross sectional view :  
2.8 Dimensions: length and width :  
2.9 Position and arrangement of engine :  
2.10 Dimension (in mm) (Specify drawing reference) :  
2.11 Length mm :  
2.12 Width mm :  
2.13 Height (Unladen) mm : 
2.14 Wheel base mm :  
2.15 Wheel track mm :  
Front :  
Rear :  
2.16 Body overhang mm :  
Front end :  
Rear end :  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  31 
 3.0 Body  
1.1 Class of Body: (Class I, Class II, Class III, Class IV, Class V & Class VI)  
3.3 Dimension drawing and photograph of the vehicle wi th representative body :  
3.4 Range of vehicle dimension (overall) :  
3.5 Dimension drawing of the body depicting chassis connecting members :  
3.6 Material used for construction :  
3.6.1 Structure Material :  
3.6.2 Size of sections: (List of sections as p er Table 1)  
3.7 Method of construction : (Brief construction method)  
3.8 Area for Passenger (m 2) : 
For seated passengers:  
For standing passengers:  
3.9 Number of passengers:  
Seated :  
Standing :  
3.10 Number of Passenger seats : (As per Seat Layout)  
3.11 Passenger capacity :  
Maximum (Including driver) :  
Crew (Including driver) :  
3.12 Number of Service doors :  
3.13 Number of emergency exits :  
3.14 Number of escape hatches :  
3.15 Volume of luggage compartments (m3) :  
3.16 Area of luggage Transpor tation on roof (m 2) : 
4.0 Clearance  
4.1 Minimum road clearance :  
4.2 Road clearance from floor :  
4.3 Approach angle :  
4.4 Departure Angle :  
4.5 Ramp -over along :  
5.0 Weights  
5.1 Vehicle kerb weight kg :  
Front axle :  
Rear axle :  
Total:  
5.2 Gross  vehicle weight kg :  
5.3 Maximum permissible axle weights kg  
Front axle  
Rear axle  
5.4 Reference mass kg :  
6.0 Max. stable inclination  
Left :  
Right :  
7.0 Tyres  PUBLIC REVIEW DRAFTDUS 1928: 2018 
32 © UNBS 2018  – All rights reserved  
 7.1 No. and arrangement of wheels :  
Front :  
Rear :  
Other :  
7.2 Inflation pressure – Unladen :  
Front :  
Rear :  
Other :  
7.3 Inflation pressure – Laden :  
Front :  
Rear :  
Other :  
8.0 Body Panels  
8.1 Outer Panels :  
8.1.1 Material :  
8.1.2 Thickness :  
8.2 Inner Panels :  
8.2.1 Material :  
8.2.2 Thickness :  
8.3 Roof Panels :  
8. 3.1 Ma terial :  
8.3.2 Thickness :  
8.4 Floor Panels :  
8.4.1 Material :  
8.4.2 Thickness :  
8.4.3 Type of anti -slip coating :  
9.0 Service Doors  
9.1 No. of Service Doors :  
9.2 Position of Service Doors :  
9.3 Dimension of Service Door :  
- Front  Height :  
Width : 
- Rear   Height :  
Width :  
- Middle  Height :  
Width :  
10.0 Emergency Exit  
10.1 No. of Emergency Doors :  
10. 2 Position of Emergency Doors :  
10. 3 Dimension of Emergency Door :  
- Ist   Height :  
Width :  
- 2nd   Height :  
Width :  
11.0 Emergenc y Windows  
11.1 No. of Emergency Windows :  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  33 
 11.2 Position of Emergency Windows :  
11.3 Area (HxW in sq. m) :  
12.0 Escape Hatch  
12.1 No. of Emergency Hatches :  
12.2 Position of Emergency Hatches :  
12 3 Area (HxW in sq. m)  
13.0 Steps  
13.1 Height of Ist  Step :  
13.2 Height of Other Steps :  
13.3 Depth of steps :  
14.0 Floor :  
14.1 Floor Height from the ground (unladen):  
14.2 Slope of floor :  
15.0 Gangway  
15.1 Height :  
15.2 Width (diameter of gauging device – lower cylinder):  
15.3 Width (diameter of  gauging device – upper cylinder):  
16.0 Handrails & Handholds  
16.1 Position (attach dimension layout):  
16.2 No. of Handholds:  
16.3 Diameter of Handholds:  
16.4 Type of anti -slip coating / covering:  
17.0 Stepwell Guard:  
17..1 Height from the floor:  
17.2 Projection from the side wall:  
18.0 Passenger Seats:  
18.1 Seat Layout:  
18.2 Seat width:  
18.3 Width of available space for one seating position:  
18.4 Height of backrest:  
18.5 Width of Armrest:  
18.6 Depth of Seat cushion (base):  
18.7 Seat Spacing : 
18.8 Seat base height:  
18.9 Torso angle:  
18.10 Seatbase thickness:  
18.11 Seat back thickness:  
18.12 Clearance space for seated passengers facing partition:  
18.13 Free Height over seating position:  
19.0 Cabin Luggage Rack:  
19.1 Width from side wal l: 
19.2 Height from Roof:  PUBLIC REVIEW DRAFTDUS 1928: 2018 
34 © UNBS 2018  – All rights reserved  
 20.0 Driver Partition:  
20.1 Dimension of partition with respect to rear edge of driver seat: (rear most position of 
driver seat)  
21.0 Driver Area:  
21.1 Width from the right side wall:  
21.2 Distance of driver partition from t he driver seat back:  
21.3 Distance from H -point to Roof Top:  
21.4 Distance between Heel Point and H -Point:  
21.5 Distance of H -Point from Floor:  
21.6 Distance of lower end of steering wheel from driver seat back:  
21.7 Thigh clearance of Steering Wheel:  
22.0 External Projections  
22.1 Ornaments:  
22.2 Projection for head light:  
22.3 Radiator grills (Applicable of on external surface):  
22.4 Gap between individual elements:  
22.5 Radius of curvature of individual element:  
22.6 Body Panel ( In case of r adius of curvature of folds in body panels are less than 2.5 mm 
the scaled drawing of folds contour and H value:  
22.7 Radius of curvature of lateral Rain/Air deflector:  
Hinges:  
Handles:  
23.0 Power Operated Service door  
23.1 Make & identification:  
23.2 Name of the producer:  
23.3 Position of control:  
 
24.0 Automatic Service door  
24.1 Make & identification:  
24.2 Name of the producer:  
24.3 Position of controls:  
24.4 Control Circuit (schematic diagram):  
 
25.0 Emergency Door – Warning Device  
25.1 Make & identification:  
25.2 Name of the producer:  
25.3 Position of device:  
 
26.0 Door locks and hinges  
26.1 Doors:  
26.2 No. of doors:  
26.3 Position and type of door:  
26.4 Door lock:  
26.4.1 Name of manufacturer:  
26.4.2 Identification mark:  
26.5 D oor hinge:  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  35 
 26.5.1 Name of manufacturer:  
26.5.2 Identification mark:  
27.0 Hood latch  
27.1 Name of manufacturer:  
27.2 Type:  
27.3 Identification mark:  
28.0 Safety glass  
28.1 Front wind shield (laminated):  
28.1.1 Make and identification:  
28.1.2 Type (flat/curved, clear/tinted):  
28.1.3 Thickness mm:  
28.1.4 No. of pieces:  
28.1.5 Radius of curvature (If curved):  
28.2 Side Windows:  
28.2.1 Make and identification:  
28.2.2 Type(flat/curved, clear/tinted, toughened):  
28.2.3 Thickness mm:  
28.2.4 Radius  of curvature (If curved):  
28.3 Rear Window:  
28.3.1 Make and identification:  
28.3.2 Type(flat/curved, clear/tinted, toughened):  
28.3.3 Thickness mm:  
28.3.4 Radius of curvature (If curved):  
 
29.0 Rear view mirror  
29.1 Left:  
29.1.1 Name of producer:  
29.1.2 Type:  
29.1.3 Dimension & radius of curvature:  
29.2 Right:  
29.2.1 Name of producer:  
29.2.2 Type:  
29.2.3 Dimension & radius of curvature:  
29.3 Inside:  
29.3.1 Name of producer:  
29.3.2 Type:  
29.3.3 Dimension & radius of curvature:  
29.4 Sketc h showing mounting arrangement of mirrors:  
30.0 Wind Screen Wiper  
30.1 Type:  
30.2 No. of wipers:  
30.3 Wiper motor:  
30.3.1 Name of manufacturer:  
30.3.2 Type and identification:  
30.3.3 Rated voltage:  
30.3.4 Frequency of wiping:  PUBLIC REVIEW DRAFTDUS 1928: 2018 
36 © UNBS 2018  – All rights reserved  
 30.4 Wiper arm:  
30.4.1 Length :  
30.4.2 Manufacturer and Identification :  
 
30.5 Wiper blade:  
30.5.1 Length :  
30.5.2 Manufacturer and Identification :  
30.6 Rubber material :  
30.6.1 Type of fixing (as per IS:7827) :  
30.6.2 Drawing indicating the seat back angle, seat tra vel, H point, Rake angle, F dimension 
And steering wheel position  
31.0 Wind Screen Washer  
31.1 Name of producer :  
31.2 Type :  
31.3 Number of nozzles :  
31.4 Spray Area :  
32 Equipment for occupant's safety  
32.1 Driver Seat belt :  
32.1.1 Name of prod ucer :  
32.1.2 Type :  
32.1.3 Number :  
32.2 Driver Seat belt anchorage :  
32.2.1 Name of producer :  
32.2.2 Type :  
32.2.3 Number :  
32.3 Head restraint :  
32.3.1 Name of producer :  
32.3.2 Type :  
32.4 Passenger Seat :  
32.4.1 Name of producer :  
32.4.2 Type :  
32.4.3 Frame structure Material :  
32.4.4 Section size:  
32.4.5 Pad material :  
32.4.6 Upholstery :  
33.0 Bumper  
33.1 Size :  
Front :  
Rear :  
33.2 Projection :  
33.3 Clearance between bumper & body :  
34.0 Fuel filler  
34.1 Aperture :  
34.2 Posit ion : PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  37 
 35.0 Fire Extinguisher  
35.1 Number :  
35.2 Type :  
35.3 Capacity :  
35.4 Name of Producer :  
36.0 First Aid Equipment  
36.1 Number :  
36.2 Contents :  
37.0 Towing devices  
37.1 Type :  
37.2 Name of manufacturer :  
37.3 Capacity :  
38.0 Number Plate  lamp  
38.1 Name of producer :  
38.2 Type and Identification :  
38.3 Number and colour :  
39.0 Tail lamp  
39.1 Name of producer :  
39.2 Type and Identification :  
39.3 Number and colour :  
40.0 Parking lamp  
40.1 Front :  
40.1.1 Name of producer :  
40.1.2 Type and Identification :  
40.1.3 Number and colour :  
40.2 Rear :  
40.2.1 Name of producer :  
40.2.2 Type and Identification :  
40.2.3 Number and colour :  
41.0 Stop lamp  
41.1 Name of producer :  
41.2 Type and Identification :  
41.3 Number and colour :  
42.0 Reversing lamp  
42.1 Name of producer :  
42.2 Type and Identification :  
42.3 Number and colour :  
43.0 Direction indicator  
43.1 Front :  
43.1.1 Name of producer :  
43.1.2 Type and Identification :  PUBLIC REVIEW DRAFTDUS 1928: 2018 
38 © UNBS 2018  – All rights reserved  
 43.1.3 Number and colour :  
43.2 Rear :  
43.2.1 Nam e of producer :  
43.2.2 Type and Identification :  
43.2.3 Number and colour :  
43.3 Side :  
43.3.1 Name of producer :  
43.3.2 Type and Identification :  
43.3.3 Number and colour :  
43.3.4 Type of flasher :  
44.0 Emergency signalling equipment  
44.1 Front :  
44.1.1 Name of producer :  
44.1.2 Type and Identification :  
44.1.3 Number and colour :  
44.2 Rear :  
44.2.1 Name of producer :  
44.2.2 Type and Identification :  
44.2.3 Number and colour :  
44.3 Side :  
44.3.1 Name of producer :  
44.3.2 Type and Identif ication :  
44.3.3 Number and colour :  
45.0 Reflector  
45.1 Front :  
45.1.1 Name of producer :  
45.1.2 Type and Identification :  
45.1.3 Number and colour :  
45.1.4 Area :  
45.2  Rear :  
45.2.1 Name of producer :  
45.2.2 Type and Identification :  
45.2.3 N umber and colour :  
45.2.4 Area :  
45.3 Side :  
45.3.1 Name of producer :  
45.3.2 Type and Identification :  
45.3.3 Number and colour :  
44.3.4 Area :  
46.0 Top light  
46.1 Name of producer :  
46.2 Type and Identification :  
46.3 Number and colour :  
47.0 Internal Lighting & Illumination  
47.1 Driver Cab lighting :  PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  39 
 47.1.1 Type :  
47.1.2 Name of producer :  
47.1.3 Number :  
47.1.4 illumination intensity :  
47 .2 Passenger Compartment Lighting  
47.2.1 Type :  
47.2.2 Name of producer :  
47.2.3 Number :  
47.2. 4 Illumination intensity :  
47.3 Other Area Lighting  
47.3.1 Type :  
47.3.2 Name of producer :  
47.3.3 Number :  
47.3.4 Illumination intensity :  
48.0 Electrical Circuit  
48.1 Circuit Diagram (attach details):  
49.0 Electrical Cables  
49.1 Name of producer  : 
49.2 Conductor Cross section :  
49.3 Insulation Class :  
50.0 Fuse  
50.1 Type & Make :  
50.2 Name of producer :  
51.0 Master switch for Electrical :  
51.1 Type & Make :  
51.2 Name of producer :  
 
 
  PUBLIC REVIEW DRAFTDUS 1928: 2018 
40 © UNBS 2018  – All rights reserved  
 
 
 
Figure 2 Typical window design 
 
 
 
 
Figure 1: Doors PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  41 
 
 
 PUBLIC REVIEW DRAFTDUS 1928: 2018 
42 © UNBS 2018  – All rights reserved  
 3-Point Seat 
Belt
  2-Point Seat 
Belt
  
 
 
 
 
 PUBLIC REVIEW DRAFTUS 1928-n:2018  
© UNBS 2018  – All rights reserved  43 
 Bibliography 
[1] DKS 372:2010 ─ Road vehicles — Passenger vehicle  body construction — Specification [2]  AIS – 052 Code of Practice for 
Bus Body Design and Approval   
[2] AIS – 052 Code of Practice for Bus Body Design and Approval   
[3] CIDECT Design Guide 7 ,for fabrication, Assembly and erection of Hallow section structures  
[4] CIDECT Design Guide 8, for circular and rectangular Hallow section welded joints under fatigue loading 
 
 PUBLIC REVIEW DRAFTPUBLIC REVIEW DRAFTUS 1928-n: 2018  
© UNBS 2018 – All rights reserved  45 
 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 b e 
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 Bureau of Standards. UNBS marked products are continually checked by UNBS fo r 
conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda National Bureau of Standards.  
 
 PUBLIC REVIEW DRAFTUS 1928-n: 2018    
 
ICS nn.nnn.nn  
Price based on nn pages  
© UNBS yyyy– All rights reserved