A building can perform as intended in a fire, allowing everyone to escape safely, and still leave behind a disaster.
The loss of the building may interrupt essential services, displace communities, damage the environment or destroy something that cannot readily be replaced. These consequences are not always captured by the minimum objectives against which fire safety designs are assessed.
Life safety is rightly the principal focus of much building fire safety regulation. Protecting occupants and supporting safe escape are fundamental objectives, and the importance of achieving them should never be understated.
However, the consequences of fire do not necessarily end when the occupants have reached a place of safety.
Consider a school destroyed by fire. Even where nobody is injured, the loss may disrupt education for hundreds of children, place pressure upon neighbouring schools and impose substantial financial and organisational burdens upon the community.
The destruction of a healthcare facility may interrupt essential treatment. A major industrial fire may affect employment, supply chains and neighbouring businesses. Fires involving substantial quantities of combustible materials can also produce environmental consequences extending well beyond the building itself.
In each case, the immediate life safety outcome may be satisfactory while the wider consequences remain severe.
This raises an important question about the objectives established at the beginning of the design process.
Building Regulations provide minimum legal requirements, but they do not necessarily address every aspect of property protection, business continuity, environmental impact or community resilience. These wider objectives may require additional consideration by building owners, designers, insurers and other stakeholders.
The distinction is particularly important because decisions taken early in design can have a substantial influence upon the consequences of a future fire.
Compartmentation, automatic suppression, separation between buildings, the selection of construction materials and the protection of critical infrastructure can all contribute to limiting damage and improving resilience.
Yet such measures may be considered primarily in terms of regulatory compliance, rather than their potential to protect the building's continued function.
This is not an argument that every building should be designed to survive every conceivable fire. Such an objective would be neither realistic nor proportionate.
Rather, it is an argument for recognising that different buildings have different consequences of failure, and that those consequences deserve explicit consideration.
For some buildings, meeting minimum life safety requirements may be an appropriate objective. For others, the importance of the building to its occupants, owners or wider community may justify a more ambitious approach.
Fire engineering provides the opportunity to examine these objectives and consider proportionate ways of achieving them.
Getting everyone out safely is essential. But it should not always be the end of the conversation about fire safety.
Pyrology Insight provides commentary on contemporary fire safety topics. It is intended to stimulate professional discussion and should not be relied upon as project-specific advice.