Fire-resistance tests -- Elements of building construction

This document establishes general principles for measuring the uniformity of furnace exposure of samples tested in accordance with the requirements of ISO 834‑1. This document specifies the type and location of instrumentation used to measure the temperature, velocity and oxygen content near the surface of simulated test samples. The surface of the simulated sample facing the furnace is gypsum board secured to cold-formed steel supports. This document does not include requirements for furnace performance. An intended use of data generated by the application of this document and the rational for the instrumentation described in this document are contained in the informative Annex A.

Essais de résistance au feu -- Éléments de construction

General Information

Status
Published
Publication Date
19-Jun-2019
Current Stage
6060 - International Standard published
Start Date
17-May-2019
Completion Date
20-Jun-2019
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ISO 834-2:2019 - Fire-resistance tests -- Elements of building construction
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INTERNATIONAL ISO
STANDARD 834-2
First edition
2019-06
Fire-resistance tests — Elements of
building construction —
Part 2:
Requirements and recommendations
for measuring furnace exposure on
test samples
Reference number
ISO 834-2:2019(E)
ISO 2019
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ISO 834-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 834-2:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test equipment....................................................................................................................................................................................................... 1

4.1 Supporting construction ................................................................................................................................................................. 1

4.2 Instrumentation ..................................................................................................................................................................................... 6

5 Test method ............................................................................................................................................................................................................11

6 Report ...........................................................................................................................................................................................................................11

Annex A (informative) Commentary ..................................................................................................................................................................13

Bibliography .............................................................................................................................................................................................................................14

© ISO 2019 – All rights reserved iii
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ISO 834-2:2019(E)
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 www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 2, Fire

containment.

This first edition cancels and replaces ISO/TR 834-2:2009, which has been technically revised.

A list of all parts in the ISO 834 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 2019 – All rights reserved
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ISO 834-2:2019(E)
Introduction

The purpose of this document is to describe a procedure to measure the exposure of a test sample

to a furnace during a test conducted in accordance with ISO 834 (all parts). The furnace exposure is

determined by measuring temperature, air velocity and oxygen concentration at various locations.

The procedure includes the use of low-cost, readily available, lightweight materials to represent the

test sample. The recommended materials minimize the influence of variable moisture content among

samples.
© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 834-2:2019(E)
Fire-resistance tests — Elements of building
construction —
Part 2:
Requirements and recommendations for measuring
furnace exposure on test samples
1 Scope

This document establishes general principles for measuring the uniformity of furnace exposure of

samples tested in accordance with the requirements of ISO 834-1. This document specifies the type

and location of instrumentation used to measure the temperature, velocity and oxygen content near

the surface of simulated test samples. The surface of the simulated sample facing the furnace is gypsum

board secured to cold-formed steel supports.

This document does not include requirements for furnace performance. An intended use of data

generated by the application of this document and the rational for the instrumentation described in

this document are contained in the informative Annex A.
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 834-1, Fire-resistance tests — Elements of building construction — Part 1: General requirements

3 Terms and definitions
For the purposes of this document, the following terms and definitions 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/
3.1
effective area of furnace opening
furnace opening within the boundaries of the monitoring instrumentation
4 Test equipment
4.1 Supporting construction

4.1.1 The supporting construction shall consist of cold-formed steel supports faced with two layers of

gypsum board a minimum of 15 mm thick intended for use in fire-barrier assemblies on the side facing

the furnace and with a single-layer structural panel a minimum of 15 mm thick on the side facing away

from the furnace.
© ISO 2019 – All rights reserved 1
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ISO 834-2:2019(E)

NOTE 1 Some examples of gypsum boards used in fire barrier assemblies include Type X by ASTM C1396,

Type F by EN 520 and as described in JIS A 6901.

NOTE 2 Cement boards, gypsum boards, plywood and oriented strand boards are considered typical

structural panels.

4.1.2 Construction details with respect to the location of the support channels, gypsum board and the

structural panels are shown in Figures 1 to 6. Figures 1 to 3 apply to horizontal supporting constructions.

Figures 4 to 6 apply to vertical supporting constructions.

4.1.2.1 The construction details assume a horizontal furnace opening of 3 m by 4 m and a vertical

furnace opening of 3 m by 3 m. Modifications to dimensions for other furnace opening dimensions and

allowances for compatibility with locally available materials and practices are acceptable.

Dimensions in millimetres
Key
1 perimeter of supporting construction
2 support channels, nine, spaced 450 mm on centre

Figure 1 — Details of horizontal supporting construction — Layout of support channels

2 © ISO 2019 – All rights reserved
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ISO 834-2:2019(E)
Dimensions in millimetres
Key
1 perimeter of supporting construction
2 inner (first) layer of gypsum board or structural panels on unexposed surface

Figure 2 — Details of horizontal supporting construction — Layout of inner layer of gypsum

board and structural panels
Dimensions in millimetres
Key
1 perimeter of supporting construction
2 outer (second) layer of gypsum board

Figure 3 — Details of horizontal supporting construction — Layout of outer layer of gypsum

board
© ISO 2019 – All rights reserved 3
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ISO 834-2:2019(E)
Dimensions in millimetres
Key
1 perimeter of supporting construction
2 support channels, eight, spaced 400 mm on centre

Figure 4 — Details of vertical supporting construction — Layout of support channels

Dimensions in millimetres
Key
1 perimeter of supporting construction
2 inner (first) layer of gypsum board or structural panels on unexposed surface

Figure 5 — Details of vertical supporting construction — Layout of inner layer of gypsum board

and structural panels
4 © ISO 2019 – All rights reserved
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ISO 834-2:2019(E)
Dimensions in millimetres
Key
1 perimeter of supporting construction
2 outer layer of gypsum board

Figure 6 — Details of vertical supporting construction — Layout of outer layer of gypsum board

4.1.3 The cold-formed steel support channels for horizontal supporting construction shall be

fabricated from steel a minimum 1,4 mm thick. The channels shall be C-shaped with a minimum depth of

240 mm, a minimum flange width of 40 mm and a minimum return flange of 12 mm.

The horizontal support channels shall be attached to rim channels. Rim channels are located along

the perimeter of the horizontal supporting construction and run perpendicular to the direction of the

support channels. The dimensions of the rim channels shall be compatible with the support channels.

The support channels shall be attached to the rim channels with steel screws.

NOTE Attachment of the support channel to the rim channel can require the use of a steel clip angle.

4.1.3.1 Modifications to dimensions for other furnace opening dimensions and allowances for

compatibility with locally available materials and practices are acceptable.
4.1.4 The cold-formed steel support channels for v
...

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