ISO 21925-1:2018
(Main)Fire resistance tests — Fire dampers for air distribution systems — Part 1: Mechanical dampers
Fire resistance tests — Fire dampers for air distribution systems — Part 1: Mechanical dampers
This document specifies a test method for the determination of the resistance of fire dampers to heat, and for the evaluation of their ability to prevent fire and smoke spreading from one fire compartment to another through an air distribution system. It is applicable to mechanical fire dampers. It is not intended to be used for dampers used only in smoke control systems, for testing fire protection devices which only deal with air transfer applications, or for dampers used in suspended ceilings, as the installation of the damper and duct can have an adverse effect on the performance of the suspended ceiling, requiring other methods of evaluation. NOTE "Air transfer" is a low-pressure application through a fire separation door (or wall, floor) without any connection to an air duct.
Essais de résistance au feu — Clapets résistant au feu pour dessystèmes de distribution d’air — Partie 1: Titre manque
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21925-1
First edition
2018-11
Fire resistance tests — Fire dampers
for air distribution systems —
Part 1:
Mechanical dampers
Reference number
ISO 21925-1:2018(E)
©
ISO 2018
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ISO 21925-1:2018(E)
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© ISO 2018
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ii © ISO 2018 – All rights reserved
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ISO 21925-1:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles of the test . 2
5 Apparatus . 3
6 Test construction .12
6.1 General .12
6.1.1 Side to be tested.12
6.1.2 Dampers installed in both walls and floors .13
6.1.3 Dampers installed within a structural opening .13
6.1.4 Dampers mounted onto face of wall or floor. .13
6.1.5 Dampers remote from wall or floor .13
6.1.6 Minimum separation between dampers .13
6.2 Size of specimen .13
6.3 Thermal release mechanism .15
6.4 Specimen installation .15
6.5 Supporting construction .16
6.5.1 Principles .16
6.5.2 Recommended supporting constructions .
...
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