The three parts
| Part | Content |
|---|---|
| BS 476-20 | General principles: heating curve, furnace pressure, measurements and criteria |
| BS 476-21 | Loadbearing elements such as beams, floors and roofs |
| BS 476-22 | Non-loadbearing elements such as partitions, doors and shutters, ceilings and glazed elements |
Results are given as the time, in minutes, for which integrity, insulation and loadbearing capacity are maintained.
Where it is used
Partitions, doors, ceilings and floors exported to the UK and to markets that follow British practice (the Middle East, Hong Kong, Singapore, Malaysia and others), when the project specification or tender names BS 476.
Frequently asked questions
How does BS 476 relate to the EN 1363 series?
The heating curves are broadly the same, but specimen mounting, criteria and how results are expressed differ. The UK itself is moving to EN 13501-2 classification, but many overseas projects still name BS 476 in their specification or tender, so confirm which one the project asks for before sending specimens.