The fire safety requirements given in Schedule 1 of the Building Regulations and the statutory guidance in Approved Document - Part B may not be a practical solution when designing large and complex buildings, for which a fire safety engineering approach might be more appropriate. Considerations of fire risk and the provision of adequate means of escape at the design stage may result in a design which fulfils not only the loadbearing functions, but also controls the spread of fire. The structural frame is required to provide resistance to the spread of fire and to maintain stability for a given time period. Further research in the behaviour of concrete is proposed, as its behaviour depends upon temperature, loading and composition. 4 refs.