Page 7 of 44 Simultaneous Evacuation Guidance – Fourth Edition 18 August 2022
2.2.
No single set of criteria can be applied to all types of buildings in all circumstances given
the complex interactions between people, buildings, and fire. Fire risk assessments need
to be specific to the building in question and consider any potential fire spread in
conjunction with the other fire safety provisions. Assessments should determine whether
the safety measures in the building support the current evacuation strategy and make
recommendations for an appropriate change where necessary (i.e. a change from a stay
put to a simultaneous evacuation strategy).
2.3.
The fire risk assessment must be reviewed and updated to reflect the risk posed by a
combustible external wall system and/or other significant failings in the general fire
precautions. Additional guidance on this type of risk assessment can be found in PAS
9980. Such assessments should only be carried out by a competent fire engineer or other
competent building professional.
2.4.
Whilst undertaking the assessment of the building, the Responsible Person should make
best endeavours to engage with residents in order to pre-warn them of any action that
may be needed. Where it is envisaged that temporary mitigating measures may be
required, the Responsible Person should also look to engage with relevant suppliers
where necessary. For example, fire alarm companies to minimise the reliance on more
costly measures, such as a waking watch.
2.5.
When determining the risk within a building, the review of the fire risk assessment should
take account of the needs of vulnerable residents and the effect that building safety risks
may have on their ability to safely evacuate. Where steps are taken to add in temporary
measures, the fire risk assessment should consider the effectiveness of communication
with all residents in the building to ensure messages are clearly understood, accounting
for areas such as different languages and cognitive abilities. Responsible Persons should
ensure that the changes to the evacuation strategy should be communicated in a format
that is easily accessible and can be understood by all. They should take into consideration
different languages, faiths, and religions, and evaluate any impact on the persons within
their premises.
3.
Background and Context
3.1.
Purpose-built blocks of flats are generally designed and built to support a stay put
evacuation strategy. The use of a stay put strategy is a choice made by architects and
designers early in a building’s design, which will inform other fire safety features within the
building. For example, the level of fire alarm and detection systems. This means that only
residents from flats directly affected by fire, heat, or smoke should need to evacuate.
Residents in unaffected flats should be protected by general fire precautions provided in
the building. Those residents should, therefore, be safe to stay put during a fire in their
building, unless affected by heat or smoke or otherwise directed by the Fire and Rescue
Service (FRS). They may also choose to leave for other reasons. In many cases,
residents may not even be aware of a fire elsewhere in the building.
3.2.
A stay put strategy relies on the fire separation between each flat, and between flats and
the common parts, such as escape corridors and stairs, to ensure that the fire and smoke
does not spread throughout the building unrestricted and uncontrolled in a way that affects
the safety of occupants. This fire separation is achieved through different means, such as