BS 9251:2021 pdf download.Fire sprinkler systems for domestic and residential occupancies — Code of practice.
4.2.2 Sprinkler speci ication The sprinkler system designer should consult with stakeholders to develop and produce the speci ication (see 4.2.1). The speci ication for the design should include the following information: a) occupancy types for sprinkler protected areas; b) available water supplies; c) how sprinkler system alarms interact with ire alarm system (see 5.18); d) details of any enhancements to sprinkler system (see 4.2.3); and e) where a ire strategy relies upon the design of the sprinkler system, a version-controlled copy of that ire strategy, including suf icient detail to understand the relationships and dependencies. NOTE Particular attention is drawn to the need for the ire engineer to consider interactions between the sprinkler system and any smoke ventilation system when they are used in combination. There may be occasions that a speci ication and/or ire strategy is not provided and in these situations, the sprinkler system should be designed in accordance with this British Standard.
4.2.3.2 Higher ire safety risk Risk of ire occurs in all buildings, however, where there are additional risks that are not the normal risk pro ile found in residential accommodation, these additional risks should be taken into account and a decision made if an enhancement to the sprinkler system is required to mitigate the risk. NOTE 1 Some additional risks may be deemed acceptable if mitigated by other ire protection methods. NOTE 2 Examples of additional risks include those with: a) ire loading greater than that which would typically be found in a domestic or residential living room, kitchen or bedroom, or if the ire hazard is greater than that of a conventional domestic or residential occupancy; b) hoarders with restrictions to means of escape and a higher ire loading; c) time for ire ighting operations to commence which may exceed duration of water supply category of system, e.g. high rise or complex buildings; d) older buildings with hidden voids and/or where passive ire protection might not meet current standards; e) heritage residential buildings where preservation of the building needs to be considered; f) atria; g) adjacent areas not sprinkler protected; h) ire engineered design solutions; and i) mixed use buildings (see 4.1, Note 3).BS 9251 pdf download.