An Integrated Systems Analysis: Fire Growth and Severity in Enclosures. An integrated systems risk-based model for fire safety has been developed and has been internationally acclaimed. A new fire severity submodel urgently needs to be developed before ramifications of the World Trade Centre catastrophe impact on fire safety regulations. Current submodels seriously misrepresent the real fires. They were developed from 1970's experiments on 2-3 metre cube-like enclosures and predict that fires ....An Integrated Systems Analysis: Fire Growth and Severity in Enclosures. An integrated systems risk-based model for fire safety has been developed and has been internationally acclaimed. A new fire severity submodel urgently needs to be developed before ramifications of the World Trade Centre catastrophe impact on fire safety regulations. Current submodels seriously misrepresent the real fires. They were developed from 1970's experiments on 2-3 metre cube-like enclosures and predict that fires engulf enclosures. Recent preliminary experiments have revealed that real fires burn locally at windows and only appear to be all engulfing. The research will lead international collaboration involving extensive experiments and some modelling to be completed in twelve months.Read moreRead less