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Hyperion

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  1. Ive suggested multisensor heads if the rationale was due to sensitive heads being activated. I’ve also highlighted that smoke logging will occur potentially before activation of the heat detectors.
  2. General needs block of flats. All the smoke heads have been taken out of the flats and replaced solely with heat detectors. This was done to cut down on false alarms as the smoke heads were causing signals from cooking, aerosols, steam etc. Does BS 5839-6:2019 condone this?
  3. I’ve come across these a couple of times now. Both times I haven’t found any grading or BS EN stamp. Can anybody confirm these are rated to FD30 doors? Thanks
  4. Depends what the fire action is.
  5. Thanks for the replies. Confirmed my thoughts.
  6. Often wondered why directional adhesive stickers are placed over emergency lights. Surely it would affect the lux? Any thoughts?
  7. I’ve come across quite a few small blocks of general needs flats (G-2) approx 6 flats. Where they’ve been built for stay put with a Grade D1 in place in each flat (not linked between flats) and a separate communal fire alarm in the communal lobby, stairs, corridors areas etc. Im of the opinion that general needs blocks designed to support a ‘stay put’ policy, it is unnecessary and undesirable for a fire alarm system to be provided. A communal fire detection and alarm system will inevitably lead to a proliferation of false alarms. This will impose a burden on fire and rescue services and lead to residents ignoring warnings of genuine fires. Communal Fire detection may also promote evacuation into smoke filled communal areas. Any thoughts?
  8. Thanks Crusher, point taken about the FRS national operational guidance of two floors below for a bridgehead. My understanding though is a safety or stairwell jet will be taken from the floor below and the firefighting jet two floors at the bridgehead. They can even go from the fire floor if the DRA permits. However that couldn’t happen with this set up. It also means you’d have two corridors disrupted and compartmentation breached with hose/jets. Doesn’t seem right to me but I guess the fire service are pretty good at adapting and overcoming dynamic situations.
  9. I have inspected a high rise recently and noted the dry riser is located in a corridor (albeit protected) and not the landing lobby (which in contrast has a much larger area for firefighting operations and Bridgehead set up. Current location would impede potential evacuees(whilst FRS operations ensue) with the flats that egress onto the corridor and there is potential for some smoke transfer to the said corridor. ADB states preference for dry riser outlets to be sited in protected lobbies or stairways but doesn’t go as far to say they can’t be in corridors if they’re protected. Anybody got any views on this??
  10. Appreciate the reply. You’ve confirmed my thoughts. Thanks.
  11. Where do you draw the conclusion if a property needs separate FRA’s? For example residential blocks not connected by MOE, own ingress and egress but managed and connected by the same AFD. Some clients insist on separate FRA’s whilst some want one to cover all for overall reference and autonomy. Thoughts greatly received.
  12. Thanks, appreciate the replies.
  13. Thanks for the replies. Should’ve pointed out the stairs are enclosed with no OV’s. Ventilation of the stairs would only be possible by FRS intervention by PPV and wedging the top floor door with AOV open. Just seems odd it was installed for a lobby the area of 3m x 1.5m and not the stairs where all flat occupants would benefit from.
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