ISO 6944-1:2024

Fire containment — Elements of building construction — Part 1: Ventilation ducts

This document specifies a method for determining the fire resistance of vertical and horizontal ventilation ducts under standardized fire conditions. The test examines the behaviour of ducts exposed to fire from the outside (duct?A) and fire inside the duct (duct?B). This document is intended to be used in conjunction with ISO?834-1.

This document is not applicable to:

a)?????? ducts whose fire resistance depends on the fire resistance performance of a ceiling;

b)?????? ducts containing fire dampers at points where they pass through fire separations;

c)??????? doors of inspection openings, unless included in the duct to be tested;

d)?????? two-sided or three-sided ducts;

e)?????? the fixing of suspension devices to floors or walls;

f)???????? kitchen extract ducts (see ISO 6944-2).

NOTE??????????? Annex?A provides general guidance and gives background information.

Edition	2024
Standard Part No	1
Published Date	2024
Published By	International Standardization Organisation
Page Count	31