ISO 21308-3:2020

INTERNATIONAL ISO
STANDARD 21308-3
Second edition
2020-09
Road vehicles — Product data
exchange between chassis and
bodywork manufacturers (BEP) —
Part 3:
General, mass and administrative
exchange parameters
Véhicules routiers — Échange de données de produit entre les
fabricants de châssis et de carrosseries (BEP) —
Partie 3: Paramètres d'échange généraux, de masse et administratifs
Reference number
©
ISO 2020
© ISO 2020
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Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Coding principles . 2
4.1 BEP codes of truck chassis and bodywork . 2
4.2 Numbering . 2
4.3 Code assignment and description . 3
4.4 Priority . 3
4.5 Loading condition . 3
4.6 Presented in . 3
4.7 Related XML coding . 3
5 BEP code assignment and description . 4
5.1 General codes . 4
5.2 Mass codes . 6
5.3 Administrative codes . 9
Annex A (informative) Axle configuration designations .11
Annex B (normative) XML coding related to this document .13
Bibliography .18
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
w w w . is o . or g / is o/ f or ewor d . ht m l .
This document was prepared by Technical Committee ISO/TC 22 Road vehicles, Subcommittee SC 40,
Specific aspects for light and heavy commercial vehicles, busses and trailers.
This second edition cancels and replaces the first edition (ISO 21308-3:2007), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— addition of new codes based on the experiences from the first edition;
— addition of Annex B showing specific XML coding for this part.
A list of all parts in the ISO 21308 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

Introduction
Truck chassis manufacturers deal with configuration of chassis in infinite numbers of possible
combinations, and bodywork manufacturers produce highly customized superstructures on these chassis.
Bodywork manufacturers build their superstructures on chassis of several different truck brands.
The production efficiency of a specific truck chassis and its body combinations can be greatly improved
by achieving the correct technical and commercial information about the specific chassis communicated
in advance with the bodywork manufacturer. The information must be reliable and give the bodywork
manufacturer confidence to prefabricate the body or the superstructure before the chassis is delivered.
With uniform conditions, unambiguous dimensions and supplementary information can be established,
transferred and correctly interpreted by the receiver. Increased information efficiency will improve
the quality and reduce the lead times.
The ISO 21308 series specifies a generic system of codes for exchanging specific data between truck
chassis manufacturers and bodywork manufacturers, providing a platform for efficient communication
between the parties. It applies to commercial vehicles as defined in ISO 3833, having a maximum gross
vehicle mass above 3 500 kg.
Exchanging codes in accordance with the ISO 21308 series is useful in various situations, for example,
for design and manufacturing, technical specifications, technical drawings and leaflets.
The codes can be communicated via, for example spreadsheet or XML, or a data exchange system based
on the STEP protocol.
INTERNATIONAL STANDARD ISO 21308-3:2020(E)
Road vehicles — Product data exchange between chassis
and bodywork manufacturers (BEP) —
Part 3:
General, mass and administrative exchange parameters
1 Scope
This document provides codes for the exchange of general, mass and administrative information
between truck chassis manufacturers and bodywork manufacturers.
The process of exchanging the above information can involve:
— chassis manufacturer;
— chassis importer;
— chassis dealer;
— one or more bodywork manufacturers;
— bodywork component suppliers, e.g. manufacturers of demountable bodies, cranes and loading
equipment, tipping equipment.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 612, Road vehicles — Dimensions of motor vehicles and towed vehicles — Terms and definitions
ISO 1176, Road vehicles — Masses — Vocabulary and codes
ISO 7656, Commercial road vehicles — Dimensional codes
ISO 21308-1, Road vehicles — Product data exchange between chassis and bodywork manufacturers
(BEP) — Part 1: General principles
ISO 21308-2, Road vehicles — Product data exchange between chassis and bodywork manufacturers
(BEP) — Part 2: Dimensional bodywork exchange parameters
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 612, ISO 1176, ISO 7656,
ISO 21308-2 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Coding principles
4.1 BEP codes of truck chassis and bodywork
Each characteristic, related to truck chassis and bodywork, is assigned a code composed of the items
given below. A prefix “BEP”, followed by a dash (-), shall be used to avoid confusion with other coding
systems.
BEP codes are formatted according to the principles in Table 1.
Table 1 — BEP coding principles
BEP-ppMccc.n.p.q.s.t
Item Assignment Description
pp Bodywork category pp = None or 00 for codes related to vehicle chassis (ISO 21308-2 and this
document)
pp = 01 for codes related to loader cranes (ISO 21308-5)
pp = 02 for codes related to hook loaders (ISO 21308-6)
pp = 03 for codes related to skip loaders (ISO 21308-7)
M Measure type A capital letter, which denotes the type of code:
H = Z direction, coordinate system in accordance with ISO 4130
L = X direction, coordinate system in accordance with ISO 4130
W = Y direction, coordinate system in accordance with ISO 4130
C = Coordinate (x,y) or (x,y,z) in the Cartesian coordinate system
M = Mass (m), or mass point (m,x,y,z)
F = Force (static or dynamic)
T = Moment (static or dynamic)
R = Radius
V = Angle
G = General
A = Administrative
ccc BEP code number Code number given by the respective part of the ISO 21308 series
.n Index number .n is used to designate object number n
.p Entity number .p is used to designate a certain set of object characteristics or entities
(e.g. dimensions, coordinates, address information)
Where both .n and .p are specified, they are given in the .n .p order.
.q Corner number .q is used to designate contour corner index number
.s Side designator L or R
.t Type designator Optional coding to describe the object type (e.g. fuel tank)
NOTE Supplementary information and support tools of this document are available on the ISO Standards
Maintenance Portal. This information can be found at the following URL: https:// standards .iso .org/ iso/ 21308.
4.2 Numbering
Each item has a unique BEP code consisting of the type letter (see Table 1) and a three-digit sequential
number, starting from 001.
The codes for repeated vehicle items of the same kind on one vehicle, e.g. axles, cross-members, frame-
mounted objects, etc., are differentiated by an added sequential number beginning with .1 counted
rearwards from the front of the vehicle.
2 © ISO 2020 – All rights reserved

For chassis-frame-mounted objects, the same .n number shall be applied to a specific object, both for
the general information on the object and the dimensional codes.
EXAMPLE Information of a fuel tank should be given the code G060.4 when referred to as a frame-mounted
object number 4 according to ISO 21308-2. This applies even if there is only one fuel tank.
NOTE ISO 21308-2 also provides an option for coding the actual object; for example the letter F is used for
fuel tank.
If the above method is not possible, the information on the relation between the general coding and the
dimensional coding for a specific object should be provided.
4.3 Code assignment and description
Subclauses 5.1 to 5.3 show the assignment of each BEP code together with a description of its
applicability and limitations.
4.4 Priority
The column “Priority” shows the priority of the measurements, as follows:
— A — Essential;
— B — Useful.
4.5 Loading condition
The column “Loading” shows the load situation of the chassis, as follows:
— 1 — Unladen;
— 2 — Laden (design mass).
NOTE A dash (-) means that the field is not applicable.
4.6 Presented in
The column “Presented in” describes in which type of document the items can be presented, as follows:
— 2D — 2D drawing;
— 3D — 3D model;
— TD — Technical data sheet, web site or bodybuilder’s manual, etc.
NOTE An empty field means that there is no specific recommendation for the presentation. It can be covered
by any kind of document. A dash (-) means that the field is not applicable.
4.7 Related XML coding
Any XML implementation for the communication of BEP codes shall follow the requirements given in
ISO 21308-1. The XML coding related to this document shall be written according to the indications in
Annex B.
5 BEP code assignment and description
5.1 General codes
The information in Table 2 should, where applicable, be supplemented by the chassis manufacturer’s
information for bodybuilders. All information may not be known from the beginning, so such codes
may be specified later in the process.
Table 2 — General codes
BEP code Assignment Description Priority Presented in
BEP-G000 Manufacturer Specifies the .p of the manufacturer.
administrative code
NOTE  Administrative codes with the same .p
set
apply to the vehicle in the actual project.
BEP-G001 Vehicle type Type of vehicle in terms of its intended use. A TD
EXAMPLE  Swap body truck, concrete mixer
chassis, car transporter, crane truck,
demountable body.
BEP-G002 Vehicle make Brand name, model designation and A TD
and model manufacturing year.
BEP-G003 Vehicle chassis Main characteristics of the chassis according A TD
information to the chassis manufacturer.
EXAMPLE  Low, high
BEP-G004 Chassis frame type Manufacturer’s chassis designation. A TD
BEP-G005 Cab type Manufacturer’s cab designation. A TD
BEP-G010.n Type of bodywork Brand name, model designation and A TD
manufacturing year.
BEP-G020 Axle configuration Specification of number of wheels, number of A TD
driven wheels and steered wheels according
to the manufacturer’s designation.
EXAMPLE  6 x 2/4 can be the designation of a
vehicle with a total of six wheels, where two
are driven and four are steered.
NOTE  See also Annex A.
BEP-G021.n Axle information Main characteristics of the n-th axle. A TD
NOTE  Driving, steering, lifting and
combinations thereof, including bogies and
tandems.
BEP-G022.n Axle type Manufacturer’s designation for the n-th axle. A TD
BEP-G023.n Axle gear ratio Manufacturer’s gear ratio data for the n-th axle. A TD
BEP-G030.n Brake type Manufacturer’s brake type designation for the A TD
n-th axle.
BEP-G031.n Rim and tyre size Tyre and rim designation on the n-th axle. A TD
BEP-G031.s is used for spare wheel.
BEP-G032.n Suspension type Manufacturer’s suspension designation for the A TD
n-th axle.
EXAMPLE  Leaf, air, etc.
BEP-G040 Engine type Manufacturer’s engine type designation. A TD
BEP-G050 Gearbox type Manufacturer’s gearbox type designation. A TD
BEP-G051 Gearbox gear ratio Manufacturer’s gearbox gear ratio data. A TD
4 © ISO 2020 – All rights reserved

Table 2 (continued)
BEP code Assignment Description Priority Presented in
BEP-G060.n Fuel tank data Type, material, volume, etc., of fuel tank with A TD
object number n.
BEP-G061.n Air tank data Type, volume, etc., of air tank with object A TD
number n.
BEP-G062.n Hydraulic tank data Type, material, volume, etc. of hydraulic tank A TD
with object number n.
NOTE  Tanks added by bodybuilder are
included.
BEP-G063.n Hydraulic oil Chassis manufacturer’s or bodybuilder’s A TD
specification.
BEP-G064.n Hydraulic pump type Manufacturer’s data for the n-th hydraulic A TD
pump.
NOTE  Data can include flow, working
pressure, displacement, rotation and type,
e.g. fixed or variable.
BEP-G070 Exhaust system Manufacturer’s exhaust designation. A TD
BEP-G071 Air intake type Manufacturer’s air intake designation. B TD
BEP-G080 Electrical system Manufacturer’s specifications for the A TD
electrical system.
EXAMPLE  Voltage, groundage, etc.
BEP-G081.n Battery data Type, capacity, etc. of battery with object A TD
number n.
EXAMPLE  BEP-G081.1: 24 V, 180 Ah.
BEP-G082.n Alternator type Manufacturer’s alternator designation and A TD
capacity.
BEP-G083.n Electrical interface Electrical interface for bodywork purposes. A TD
for bodywork
BEP-G084.n Electrical interface Type of electrical connectors between A TD
for towed vehicle towing and towed vehicle.
EXAMPLE  24 V connector according to
ISO 12098 and the ISO 7638 series.
BEP-G085.n Electronic interface Electronic interface for bodywork purposes. A TD
for bodywork
BEP-G086.n Electronic interface Type of electronic transmission between A TD
for towed vehicle towing and towed vehicle.
EXAMPLE  CAN communication according to
the ISO 11992 series.
BEP-G100.n Hydraulic interface Hydraulic interface between the chassis and A TD
for bodywork bodywork.
BEP-G101.n Hydraulic interface Type of hydraulic connectors between towing A TD
for bodywork on and towed vehicle, for bodywork purposes.
towed vehicle
NOTE  Male/female, size, etc.
BEP-G110.n Pneumatic interface Pneumatic interface between the chassis and A TD
for bodywork bodywork.
BEP-G111.n Pneumatic interface Type of pneumatic connectors between A TD
for bodywork on towing and towed vehicle, for bodywork
towed vehicle purposes.
NOTE  Male/female, size, etc.
Table 2 (continued)
BEP code Assignment Description Priority Presented in
BEP-G120.n PTO type Designation and type, e.g. gearbox, engine, A TD
flywheel, and rotational direction
(clockwise/counter-clockwise) of the n-th PTO.
NOTE 1  PTO axle rotation is as viewed from
the connection interface.
NOTE 2  PTO dimension code is designated
item 043 according to ISO 21308-2.
EXAMPLE  PTO 2 is designated BEP-G120.2
and the corresponding dimensional code is
BEP-L043.2, BEP-H043.2 and BEP-W043.2.
BEP-G121.n PTO output data Manufacturer’s data for the n-th PTO output at A TD
a given rotational speed.
BEP-G130 Front underrun Manufacturer’s specifications of front A TD
protection underrun protection.
BEP-G131 Side underrun Manufacturer’s specifications of side A TD
protection underrun protection.
BEP-G132 Rear underrun Manufacturer’s specifications of rear A TD
protection underrun protection.
BEP-G140.n Towing device Manufacturer’s specifications for the n-th A TD
towing device.
BEP-G150.n Fender Manufacturer’s specifications for the n-th A TD
fender.
5.2 Mass codes
Legally authorized masses in Table 3 should be applicable to the country as given by the administrative
code A070.
Table 3 — Mass codes
BEP code Assignment Description Priority Presented in
BEP-M001 Technically The maximum permissible vehicle mass A TD
permissible gross according to the technical design of the
vehicle mass vehicle, established by the vehicle
manufacturer.
BEP-M002 Legally authorized The maximum permissible vehicle mass A TD
gross vehicle mass according to national or regional legislative
authorities.
BEP-M010 Technically The maximum permissible towable mass A TD
permissible according to the technical design of the
towable mass towing vehicle, the drawbar and the towing
device, established by the respective
manufacturer.
BEP-M011 Legally authorized The maximum permissible towable mass A TD
towable mass according to national or regional legislative
authorities.
BEP-M020 Technically The maximum permissible load of the rear A TD
permissible load axle combination according to the technical
on vehicle rear axle design of the vehicle, established by the
combination vehicle manufacturer.
BEP-M021 Legally authorized The maximum permissible load of the rear A TD
load on vehicle rear axle combination according to national or
axle combination regional legislative authorities.
6 © ISO 2020 – All rights reserved

Table 3 (continued)
BEP code Assignment Description Priority Presented in
BEP-M030 Technically The maximum permissible load of the front A TD
permissible load on axle combination according to the technical
vehicle front axle design of the vehicle, established by the
combination vehicle manufacturer.
BEP-M031 Legally authorized The maximum permissible load of the front A TD
load on vehicle front axle combination according to national or
axle combination regional legislative authorities.
BEP-M040.n Technically The maximum permissible load of the vehicle A TD
permissible axle n-th axle according to the technical design of
load on the vehicle the vehicle, established by
...