Possibility of Applying a Performance-based Approach for Designing Means of Escape in a Public Transport Interchange

摘要

Performance-based design on building fire safety provisions as an alternative to prescriptive code design is going to be developed in Hong Kong. But how to do this is not yet clear. In this transition period, alternative approach to design for projects with difficulties in complying with prescriptive codes is allowed. Projects would be considered case by case individually. There are always arguments on the design for means of escape (MoE), as the usable floor area will be affected. In this paper, the prescriptive approach of the MoE code with respect to the local buildings characteristics and occupants characteristics are reviewed. Deficiency and inadequacy of the MoE code, which is not yet updated quick enough for getting an appropriate fire safety solution for some building or occupancy types, are discussed. The possibility of adopting performance-based design approach in this transition period is examined. MoE design in a public transport interchange is taken as an example in this paper. Evacuation for the disabled is also discussed. Aspects on designing smoke management system are outlined. The alternative of using drencher system is examined through full-scale burning tests.