BS 9999: 2017
“Fire precautions in the design and construction of buildings”.
BS 9999: 2017 is a British Standard, and an Approved Document for compliance with the Building Regulations (England & Wales).
This Document addresses the need for sealing the threshold of a fire resistant door assembly, stating that if the gap at the threshold exceeds 3mm, then a threshold seal must be used.
You may also find our FAQ on threshold sealing helpful (Fire, Smoke and Weather Sealing for Door Assemblies section).
This link to British Standards Online may be of interest.
Relevant Lorient links:
- Acoustic, Smoke and Fire Seals for Door Assemblies
- CPD Seminar: The Role & Performance of Fire & Smoke Resisting Door Assemblies
For more information please contact Technical Helpline: Telephone: +44 (0) 1626 834252 e-mail: firstname.lastname@example.org