Thread Rating:
  • 2 Vote(s) - 4 Average
  • 1
  • 2
  • 3
  • 4
  • 5
a.f.d. near door holders
#1
afternoon...

with door holders in corridors do you still need smokes within 1 metre of the door holder? the consultant has raised a concern that the old system had smokes within 1 metre of the door and the new system doesn't. I said they only need to be within 7.5 metres (which they are) as the whole site is now covered for L2. the reason the old smokes were there was to cover a specific risk as there weren't smoke detectors anywhere else, only for these doors.

second question - the other side of the door holders (the canteen) used to have a smoke within 1 metre of the door holder but the new system only has heats in the canteen. does it need to have a smoke in this end of the canteen? the designer specified heats as he was worried about false alarms from smokes in the canteen.
Reply
#2
Should have smokes protecting the exit from the canteen with heat over cooking areas.
It was an older standard that required smoke near doors when e smokes operated the release. Not really used these days
http://awacsuk.com

advanced warning and communicated systems
installation...integration...innovation....

any comments or views posted are mine and I'm keeping them.
Reply
#3
It's all in bS7273-4, do you have a copy?
Anthony Buck
Fire Safety Technical Lead @ BAFE SP205 accredited company
Extinguisher specialist

http://www.facebook.com/group.php?gid=65...415&ref=ts
http://www.youtube.com/user/contactacb
http://www.linkedin.com/pub/anthony-buck/22/957/36b
Reply
#4
If not I send over an extract
Anthony Buck
Fire Safety Technical Lead @ BAFE SP205 accredited company
Extinguisher specialist

http://www.facebook.com/group.php?gid=65...415&ref=ts
http://www.youtube.com/user/contactacb
http://www.linkedin.com/pub/anthony-buck/22/957/36b
Reply
#5
(17-05-2017, 02:04 PM)alonso Wrote: afternoon...

with door holders in corridors do you still need smokes within 1 metre of the door holder? the consultant has raised a concern that the old system had smokes within 1 metre of the door and the new system doesn't. I said they only need to be within 7.5 metres (which they are) as the whole site is now covered for L2. the reason the old smokes were there was to cover a specific risk as there weren't smoke detectors anywhere else, only for these doors.

second question - the other side of the door holders (the canteen) used to have a smoke within 1 metre of the door holder but the new system only has heats in the canteen. does it need to have a smoke in this end of the canteen? the designer specified heats as he was worried about false alarms from smokes in the canteen.

LOL I may have said this already but for everyone else

BS 7273-4 only requires you to move away from standard spacing's if you have an L4 or L5/M category for everything else the normal spacing's will be ok.
the thinking is if you have a fire in a room off the escape route, smoke could enter the escape route and fill the escape route with smoke, before the detectors in the escape route trigger, closing the doors. so if you have a held open door and rooms off the escape route and a category L4 or L5/M place detectors between the door to the room and the held open door. this gives the quickest time to trigger the doors to close. L1, L2 & L3 all have detection in the room off the escape route so no need to move detectors in the escape route as they will trigger the doors if there is a fire in the room.

and yes i would put a smoke near the door to the canteen or use multi sensors
www.fia.uk.com

Technical Manager FIA

All comments and views are mine own and may not reflect the views of FIA
Reply
#6
(18-05-2017, 11:16 AM)Will Lloyd Wrote:
(17-05-2017, 02:04 PM)alonso Wrote: afternoon...

with door holders in corridors do you still need smokes within 1 metre of the door holder? the consultant has raised a concern that the old system had smokes within 1 metre of the door and the new system doesn't. I said they only need to be within 7.5 metres (which they are) as the whole site is now covered for L2. the reason the old smokes were there was to cover a specific risk as there weren't smoke detectors anywhere else, only for these doors.

second question - the other side of the door holders (the canteen) used to have a smoke within 1 metre of the door holder but the new system only has heats in the canteen. does it need to have a smoke in this end of the canteen? the designer specified heats as he was worried about false alarms from smokes in the canteen.

LOL I may have said this already but for everyone else

BS 7273-4 only requires you to move away from standard spacing's if you have an L4 or L5/M category for everything else the normal spacing's will be ok.
the thinking is if you have a fire in a room off the escape route, smoke could enter the escape route and fill the escape route with smoke, before the detectors in the escape route trigger, closing the doors. so if you have a held open door and rooms off the escape route and a category L4 or L5/M place detectors between the door to the room and the held open door. this gives the quickest time to trigger the doors to close. L1, L2 & L3 all have detection in the room off the escape route so no need to move detectors in the escape route as they will trigger the doors if there is a fire in the room.

and yes i would put a smoke near the door to the canteen or use multi sensors

thanks will.

p.s. everyone should follow the fia on facebook. it's great!
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  smokes either side of a fire released access door alonso 5 504 05-05-2017, 03:21 PM
Last Post: alonso
  Door Retainers kevin hynes 37 9,021 24-01-2017, 01:12 PM
Last Post: alex88
  access door relays Theoldman 9 1,584 22-09-2016, 08:48 AM
Last Post: Will Lloyd
  Door Closers kevin hynes 2 1,065 09-10-2015, 11:03 PM
Last Post: sparky999
  New regs for door relays skelffie 24 19,138 21-01-2011, 06:54 PM
Last Post: Ian Warrick
  Automatic Fire Door Detection Ferret 5 4,736 20-01-2011, 10:12 PM
Last Post: Ferret
  emergency door maglocks spug 2 2,587 22-12-2010, 01:42 AM
Last Post: AnthonyB

Forum Jump:


Users browsing this thread: 1 Guest(s)