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Meady

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About Meady

  • Birthday 03/02/1989

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    Swansea

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  1. Excellent - thank you both for your replies. Much appreciated.
  2. Hi - we're after a bit of advice please... A room in a large college (built circa 1800's) is going to be used for large assemblies including those who may not be familiar with building layout. Floor space is 320M2, and has 2 opposite means of escape each taking occupants to a protected stairway which both discharge directly to fresh air. But both doorways are only 870mm...so when discounting one of them, the numbers reduce dramatically so the width of the doorway is being used for the capacity calculations. Now, the debate is whether we use BS9999 or DCLG guides? If we use BS9999 the width per person (for a B2 category occupancy) is 4.1mm which gives us a figure of approximately 200. But the DCLG guide would suggest that for a door width of 870mm would only be suitable for 100 occupants...?? We've asked the local Fire Service and they've said to use BS9999 (but have said they won't put this in writing). Another consultant we've approached has said that DCLG uses Building Regulations ADB as its guide and we shouldn't be using that either. Please can anyone help us by telling us what guide we should be using??? We will comply with whatever guide we need but just want to get things right and safe!!
  3. That's a brilliant help - thank you Anthony.
  4. Hi Can we ask your advice - we have an office block (ground, first and second floors). Each floor is approx. 360M2. Two protected stairways - each have 2 x FD30s lobby approaches. Question is; do we need FEA's inside each protected stairway at each landing in addition to them being inside (adjacent to) each fire exit door in the office accommodation area?? At present, we have 1 x 13A Water Mist and 1 x 2KG FEA on brackets in the office accommodation area adjacent to the exit doors. Our thinking was that the fire risk is in the office area so if staff have to travel in to the stairway to collect the FEA's, they will then have to return in to the office accommodation to tackle the flames...which is madness in our mind! BUT, the Fire Extinguisher company says we do HAVE to position additional extinguishers inside the stairway too...but BS5306-8 appears to show that as long as we have 2 x 13A on each level (plus CO2), we are fine?? So why should we have to have FEA's inside the office accommodation and then double up with exactly the same in the stairway itself?? We have ordered a 5KG CO2 extinguisher for the 415V electricity cupboard too. Any help/guidance much appreciated. Thank you.
  5. Meady

    External stairway

    Thanks Anthony.
  6. Meady

    External stairway

    Sorry - silly question time... This is a specific case; but is also a general question as to whether internal stairs must be protected if there is also a second means of escape being an external stair. An existing building which is being converted from a residential accommodation (small block of flats) in to an office/admin block. There is ample room for an external stair to be fitted. Built 2008. Three storeys (ground, first and second) plus basement/cellar. 60-min fire separation between basement/cellar and ground floor. Footprint of each floor is approximately 10m x 12m. L3 alarm system / emergency escape lighting being installed. Risers will be enclosed within 30-min protection. Standard construction (brick, breeze block, concrete floors, flat roof). Occupancy levels will be approximately 10 per floor (none in basement/cellar which is used for plant room / electrics). The client wants a complete open plan design with an open internal staircase. Building Control will be involved - client is at drawings/plans stage at present. The glazing along the external stair with 30-minute glass which is sealed closed. The fire door from first floor leading to external stair will also be FD30 standard/ Question: I just want to double check; is the open plan internal stair acceptable as long as; A) External escape stair is fully protected along route B) Travel distances from any point in the first & second floor levels are acceptable (less than 18m in single direction to only protected means of escape) C) Occupancy levels from each floor are less than 60 I've been reading BS9999 & ADB which I think is relevant as this is a complete conversion of a building. Item 18.7 of BS9999 in particular. Or am I misunderstanding this and does the internal stair also have to be protected?? In view of low occupancy levels; I think that only 1 means of escape from each floor is acceptable as long as the travel distances are within 18m? In your experience(s), are there any other compensatory features the client could consider which may make an open internal stair acceptable?? Higher levels of AFD perhaps? Sprinklers?? Any help or guidance in right direction much appreciated!! Sorry - new query for me!
  7. Meady

    High rise flats / Building regs

    Excellent - thank you again for your help.
  8. Meady

    High rise flats / Building regs

    Thank you Anthony and Tom again for your help - that's brilliant. Tom - thank you for pointing that out. I may be misreading this...but a note under ADB paragraph 2.19 states 2.20 to 2.51 are not applicable where the top floor is not more than 4.5m above ground level...so the fact there is a double negative in that sentence, does that mean that 2.20 to 2.51 are applicable only to buildings where top floor is higher than 4.5m??? I am guessing that 4.5m would be a single or two storey dwelling so these guides are not relevant to lower level flats??
  9. This is a theoretical query as I'm doing some training and high rise blocks of flats has come up (not specific to Grenfell as the paper was written before the tragedy in 2017). The paper tells me to read ADB and BS9999 as well as the DCLG/GOV.COM guide for purpose built flats. I have been told by someone else in the industry (which is why i am querying this) that Grenfell complied with current building regs...I am a novice in the industry but find it hard to get my head around why a building which is 30m+ high would only have one means of escape (even with a stay put policy)?!?!? So, I have read what I thought would be the building regs (ADB 2010) to see what the current guide would be; but I cannot for the love of me find where it says in the ADB that a single stair is acceptable in a high rise block of flats?! Please can you steer me in the right direction??Article 2.19 and 2.20 to me reads that a single stair is only allowed up to floor levels of 4.5m?? I've read it time and time again and am just getting more and more confused! Is this now right and any block of flats with a floor above 4.5m must now have at least two means of escape once occupants are out of their flats and in the shared corridors?Any help always appreciated. My only thought was that, at the time of design and construction, Grenfell did conform with the building regs. and that the current ADB is not retrospective. Also, would the FSO 2005 see it as unreasonable/unpractical to install a second means of escape afterwards?? Sorry - lots of questions here...but any guidance would be much appreciated.
  10. Thank you Anthony...the guy that completed the FRA has said that the quarterly inspection is his own recommendation. He has suggested a quarterly test (rather than annual) because of the fact the doors do not automatically open when fire alarm is set-off. So he wanted more regular tests to make sure the green boxes work. I'm still a bit worried so we are thinking of a monthly test of all green boxes.
  11. Does anyone know how often the little green override switches fixed next to electronically locked doors along exit routes need testing in-house? I've been pointed to BS7273-4:2015 and the maintenance section suggests every week in-house and every six-months by a competent person?? But, the FRA produced shows that the green boxes only need testing in-house every quarter to comply with British Standards so we're all really confused! Due to security, the doors do not release upon actuation of fire alarm, so we thought every quarter is a bit risky...but then again, every week is a bit much!! HELP!! :)
  12. Do all final exits from a building (where there is a possibility that members of public entering may be wheelchair users) have to open in the direction of travel? Or can they open inwards? There is a Dental practice where they have suitable door widths for wheelchairs, a ramp at 1:12 ratio, disabled toilets, etc. But the main door used by all clients opens inwards?! I've had a look at Gov.com guide for disabled means of escape but cannot see it mentions this. Typically, occupancy is below 60 people so an inward opening door appears acceptable in some guides, but my only concern in that wheelchair users will not be able to open door quickly, or even block the exit completely?! Any guidance much appreciated as always.
  13. Meady

    BS9999 occupancy calculations

    Thank you guys for your help and guidance - much appreciated.
  14. Meady

    BS9999 occupancy calculations

    Thank you Tom and Anthony... Would you recommend I use the DCLG Guides instead?
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