ISO 834-2:2019
(Main)Fire-resistance tests — Elements of building construction — Part 2: Requirements and recommendations for measuring furnace exposure on test samples
Fire-resistance tests — Elements of building construction — Part 2: Requirements and recommendations for measuring furnace exposure on test samples
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.
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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 2019
© 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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
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
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.
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.
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
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
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
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 vertical supporting construction shall be fabricated
from steel a minimum of 0,9 mm thick. The channels shall be C-shaped with a minimum depth of 90 mm,
a minimum flange width of 30 mm and a minimum return flange of 5 mm.
The vertical support channels shall be attached to rim channels. The rim channels are located along the
top and bottom of the vertical supporting construction. 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.
4.1.4.1 Modifications to dimensions for other furnace opening dimensions and allowances for
compatibility with locally available materials and practices are acceptable.
4.1.5 The support channels shall be spaced 300 mm to 450 mm on centre.
4.1.6 The inner layer of gypsum board shall be attached to the support channels with steel screws
designed for the attachment of gypsum board to steel supports. Typical screws have a thread diameter
of 5 mm, a head diameter of 8 mm and a length of 25 mm. The screws shall be spaced a maximum of
200 mm on centre along each support channel. A distance of 10 mm to 15mm shall be provided between
the screws and the edges of the gypsum board. It is permitted to use screws with different dimensions to
accommodate local practices.
NOTE The inner layer, or base layer, is in contact with the support channels.
4.1.7 The exposed layer of gypsum board shall be attached to the support channels with steel screws
designed for the attachment of gypsum board to steel supports. Typical screws have a thread diameter
of 5 mm, a head diameter of 8 mm and a length of 40 mm. The screws shall be spaced a maximum of
200 mm on centre along each support channel and spaced 100 mm from the screws used to attach the
inner layer. A distance of 10 mm to 15 mm shall be provided between the screws and the edges of the
gypsum board.
NOTE The exposed layer, or outside layer, is in contact with the inner layer of gypsum board.
4.1.8 The structural panels shall be attached to the support channels
...
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 2019
© 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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
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
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.
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.
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
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
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
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 vertical supporting construction shall be fabricated
from steel a minimum of 0,9 mm thick. The channels shall be C-shaped with a minimum depth of 90 mm,
a minimum flange width of 30 mm and a minimum return flange of 5 mm.
The vertical support channels shall be attached to rim channels. The rim channels are located along the
top and bottom of the vertical supporting construction. 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.
4.1.4.1 Modifications to dimensions for other furnace opening dimensions and allowances for
compatibility with locally available materials and practices are acceptable.
4.1.5 The support channels shall be spaced 300 mm to 450 mm on centre.
4.1.6 The inner layer of gypsum board shall be attached to the support channels with steel screws
designed for the attachment of gypsum board to steel supports. Typical screws have a thread diameter
of 5 mm, a head diameter of 8 mm and a length of 25 mm. The screws shall be spaced a maximum of
200 mm on centre along each support channel. A distance of 10 mm to 15mm shall be provided between
the screws and the edges of the gypsum board. It is permitted to use screws with different dimensions to
accommodate local practices.
NOTE The inner layer, or base layer, is in contact with the support channels.
4.1.7 The exposed layer of gypsum board shall be attached to the support channels with steel screws
designed for the attachment of gypsum board to steel supports. Typical screws have a thread diameter
of 5 mm, a head diameter of 8 mm and a length of 40 mm. The screws shall be spaced a maximum of
200 mm on centre along each support channel and spaced 100 mm from the screws used to attach the
inner layer. A distance of 10 mm to 15 mm shall be provided between the screws and the edges of the
gypsum board.
NOTE The exposed layer, or outside layer, is in contact with the inner layer of gypsum board.
4.1.8 The structural panels shall be attached to the support channels
...
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