BS 5268-4.2:1990

Foreword
Committees responsible
Recommendations
1 Scope
2 Definitions
3 Fire resistance criteria
4 Materials
5 Construction details
6 Calculation method
Appendix
A Worked examples
Tables
1 Internal walls required to provide a fire resistance
    performance of 30:30:30 min. Single leaf walls of
    symmetrical/asymmetrical construction exposed to
    fire from one side at a time
2 Internal walls required to provide a fire resistance
    performance of 60:60:60 min. Single leaf walls of
    symmetrical/asymmetrical construction exposed to
    fire from one side at a time
3 Internal walls required to provide a fire resistance
    performance of 60:60:60 min. Double leaf walls of
    symmetrical/asymmetrical construction exposed to
    fire from either side
4 External walls required to provide a fire resistance
    performance of 30:30:15 min. Single leaf walls of
    symmetrical/asymmetrical construction exposed to
    fire from the inside only
5 External walls required to provide a fire resistance
    performance of 30:30:30 min. Single leaf walls of
    symmetrical/asymmetrical construction exposed to
    fire from one side
6 External walls required to provide a fire resistance
    performance of 60:60:60 min and 60:60:15 min. Single
    leaf walls of symmetrical/asymmetrical construction
    exposed to fire from one side at a time
7 Specification of materials and conditions of fixings
    for walls
8 Timber floors, concealed joists, required to provide
    fire resistance performance of 30:15:15 min and
    30:30:30 min
9 Timber floors, concealed joists, required to provide
    a fire resistance performance of 60:60:60 min
10 Timber floors, exposed joists, required to provide a
    fire resistance performance of 30:30:30 min
11 Specification of materials and conditions of fixing
    for floors
Figures
1 Diagram showing depth x breadth of stud and breadth
    of joist
2 Profiles for tongued and grooved ceiling boards
3 Methods of fixing insulation materials in walls
4 Methods of fixing insulation materials in floors
5 Method of fixing ceiling linings to exposed joists

Extends the code given in Section 4.1 of BS 5268 to include composite timber elements.