Table B3 Specific provisions of the test for fire resistance of elements of structure, etc.

see Table B4
See Table C1
See Appendix C
NOTES:
1. BS EN 13501-2 Classification using data from fire resistance tests, excluding ventilation services.BS EN 13501-3
Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers. BS EN 13501-4 Classification using data from fire resistance tests on components of smoke control systems.
In the European classification:
‘R’ is the resistance to fire in terms of loadbearing capacity.
‘E’ is the resistance to fire in terms of integrity.
‘I’ is the resistance to fire in terms of insulation.
The national classifications do not automatically equate with the alternative classifications in the European column, therefore products cannot typically assume a European class unless they have been tested accordingly.
2. BS 476-20 for general principles,BS 476-21 for loadbearing elements,BS 476-22 for non-loadbearing elements,BS 476-23 for fire-protecting suspended ceilings and BS 476-24 for ventilation ducts.
3. Applies to loadbearing elements only (see paragraph B19).
4. Guidance on increasing the fire resistance of existing timber floors is given in BRE Digest 208.
5. Only if a suspended ceiling meets the appropriate provisions should it be relied on to add to the fire resistance of the floor.
6. Such walls may contain areas that do not need to be fire resisting (unprotected areas). See Section 11.
7. Unless needed as part of a wall in item 5a or 5b.
8. Except for any limitations on uninsulated glazed elements given in Table B5.