Automist is suitable for domestic high rise use.
Runnymede Council began a programme to retrofit sprinklers to flats within its only tower block – the 16-storey Surrey Towers in Addlestone. To avoid issues with access and disruption to tenants, installations took place when they are either subject to major internal works, or at the time of re-letting.
The authority adopted the policy a couple of years ago in consultation with Surrey Fire and Rescue Service after reviewing its fire risk assessment in light of the coroner’s ruling following the Shirley Towers blaze.
They selected Automist as part of a rolling retrofit programme.
Its usage can be justified, as per BS 8458 which states:
If the type of building is not listed in Table 1 (below), or for buildings over 45m, then the AHJ should be consulted to agree whether additional measures are needed (see 4.6 ), or whether an alternative system BS 8489 or BS EN 12845 is more appropriate.
4.6 Special circumstances
In some circumstances, enhanced performance, reliability and resilience arrangements should be provided, if an assessment shows them to be necessary. Where appropriate, the designer should consult the relevant AHJ(s).
NOTE 1 Examples of such arrangements include:
- extended duration of water supply;
- making water supplies more robust, such as by the provision of redundancy in the pumping arrangements, back-up electrical supplies, or a fire service infill connection to a stored water tank;
- increasing the design discharge density or design assumed maximum area of operation (AMAO).
NOTE 2 Situations where this might be necessary include:
- dwellings with a fire load greater than that which would normally be found in a residential or domestic living room, kitchen or bedroom, or if the fire hazard is greater than that of a conventional residential or domestic occupancy;
- buildings where the time for fire-fighters to commence fire-fighting in the fire compartment might exceed the duration of water supply of the expected category of system, e.g. buildings over 45 m in height or complex buildings;
- older buildings with hidden voids and/or where compartmentation might not meet current standards;
- buildings with atria or where a risk assessment shows that the spread of fire could involve two or more enclosed volumetric spaces;
- buildings with adjacent areas not protected by an automatic fire suppression system;
- buildings housing vulnerable people (see Annex B);
- buildings with fire engineered design solutions;
- mixed-use buildings (see Note to 4.1);
- premises providing secure accommodation, asylum centres or similar premises
(specialist nozzles are available for institutional situations where ligature or malicious tampering are a concern).
It is worth noting that most of the limitations of use of BS8458 systems in high rise are governed by the limitations of water supply. This is why Automist can be an excellent solution for drawing the industries lowest 5.6 litres per minute.