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Tested Detail Queries

You sent a flexible wall detail, but I have a rigid wall?

As per the BS EN 1366-3:2021 fire-resistance test standard for service penetrations, Section 13.3.2.4 states:

Section 13.3.2.4

Test results obtained with double-sided standard flexible wall construction may be applied to rigid constructions of an overall thickness equal to or greater than that of the element used in the tests and a minimum density of 350kg/m³. For rules regarding increased thickness see Annex E, if relevant. In the case of hollow brick walls, the same rules regarding aperture framing apply to double-sided flexible walls.

Learn more about BS EN 1366-3:2021’s rules for the interchangeability of supporting constructions.

If you have any further questions, please don’t hesitate to contact us.

Please Note

The information in this article was accurate at the time of publication. As the industry evolves, information may change too. Although we aim to keep our website updated, if it has been a significant amount of time since the publish date, please verify the information and contact us if you have any questions!

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This article was written by

Alec Purdie TIFireE

As Technical Manager at Quelfire, Alec Purdie leads the technical team in providing evidence-based guidance and support for firestopping solutions. A Technician member of the Institution of Fire Engineers (TIFireE), he combines recognised qualifications with industry experience to help clients design and deliver projects with tested, compliant details from the outset.

Learn More About Alec

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