BS EN 1634-1:2014 + A1:2018 is a standard that specifies the methods for conducting fire resistance tests on door and shutter assemblies, including openable windows and certain building hardware elements. It is a crucial standard for assessing how well doors can withstand fire, contributing significantly to the overall fire safety of buildings.
The purpose of the fire resistance tests under this standard is threefold:
- To restrict the initial development of a fire.
- To limit the spread of fire and smoke within the building.
- To safeguard escape routes, thereby protecting the life safety of building occupants.
The standard measures the duration for which a door or shutter assembly can maintain its integrity and insultation under defined fire conditions. In the context of this standard, for example a door’s ability to withstand a fire for at least 30 minutes is classified as E30, and for at least 60 minutes as E60. This ability to maintain structural integrity and insulation is crucial for keeping escape routes and compartmentation within buildings protected during a fire.
Fire Resistance Testing: BS EN 1634-1
The testing process under EN 1634-1 for fire resistance of doorsets is both detailed and stringent, designed to replicate the challenging conditions a fire door may face. A fire door assembly, including its frame and any hardware such as hinges, closers, and locks, is installed into a furnace test rig. Here’s a step-by-step breakdown of the process:
- Optional Sampling Visit: Initially, an optional visit by an approved or notified body may occur to witness the production of the doorset specimen. This ensures that the doorset being tested is representative of the product line and is manufactured according to the required specifications.
- Delivery and Conditioning: Once the doorset is produced, it must be delivered to a testing laboratory where it undergoes a conditioning period to ensure it has acclimatized to the test conditions. This step is crucial for obtaining accurate and consistent results.
- Installation: The conditioned doorset is then installed in a standard supporting construction that mimics a typical building framework. This setup aims to provide a realistic scenario of how the doorset would perform in actual building conditions.
- Instrumentation and Survey: Before the fire test begins, the doorset is thoroughly surveyed and equipped with thermocouples. These devices measure temperature at various points on the doorset, providing essential data on how the doorset reacts to the heat during the test.
- Fire Resistance Testing: The actual testing involves subjecting the doorset to controlled fire conditions to assess three critical performance aspects:
- Integrity (E) – The length of time the door can prevent the passage of flames and hot gases.
- Insulation (I) – The period the door can limit the temperature rise on the non-exposed face to below specified levels.
- Radiation (W) – The ability of the door to limit the level of radiant heat.
- Reporting: Following the completion of the test, a comprehensive report is compiled. This report includes detailed documentation such as images of the test, drawings of the setup, and data collected from the thermocouples. Additionally, it outlines the specific fields of application for the tested doorset, indicating where and how it can be safely implemented in building projects.
The thoroughness of the EN 1634-1 testing process ensures that doorsets not only meet strict safety standards but also provide reliable protection in fire situations, significantly contributing to the overall safety and compliance of building constructions.
EN 1634-1 vs BS 476-22
When comparing BS EN 1634 to BS 476-22, another fire testing standard used in the UK, there are notable differences in their testing rigor and international recognition. BS EN 1634 uses a different thermometer setup for controlling the test furnace, which typically results in a slightly more demanding test condition, leading to a 5-20% reduction in performance compared to BS 476-22. However, BS 476-22 does not support CE or UKCA marking, limiting its recognition outside the UK, unlike BS EN 1634 which is recognized across Europe and beyond. This makes BS EN 1634 a more robust and broadly applicable standard for fire resistance testing in the context of international building safety compliance.
