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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Fire Hoods for in-ceiling Atmos speakers
Just noticed these in the Richer Sounds Clearance sale.
I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore |
#2
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Fire Hoods for in-ceiling Atmos speakers
Andrew wrote:
I find it difficult to believe that this would provide 66 minutes of protection. https://www.richersounds.com/clearance-bargains/in-store/39/hoody-hoody4.html?instore They seemed to manage 90 minutes of testing https://www.mastdigital.co.uk/media/productattach//h/o/hoody_bs_en_1363_1.pdf |
#3
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Fire Hoods for in-ceiling Atmos speakers
On 29/01/2021 13:22, Andrew wrote:
Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore nah they are fine.... |
#4
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Fire Hoods for in-ceiling Atmos speakers
On 29/01/2021 14:19, Jimmy Stewart ... wrote:
On 29/01/2021 13:22, Andrew wrote: Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore nah they are fine.... common practice above FR ceilings for lights etc .... |
#5
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Fire Hoods for in-ceiling Atmos speakers
Cannot see it but to my mind once the room is alight enough to cause that
sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "Andrew" wrote in message ... Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore |
#6
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Fire Hoods for in-ceiling Atmos speakers
On 29/01/2021 15:46, Brian Gaff (Sofa) wrote:
Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... |
#7
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Fire Hoods for in-ceiling Atmos speakers
On 29/01/2021 14:34, Jimmy Stewart ... wrote:
On 29/01/2021 14:19, Jimmy Stewart ... wrote: On 29/01/2021 13:22, Andrew wrote: Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore nah they are fine.... common practice above FR ceilings for lights etc .... Speakers need a much bigger hole in the ceiling though. |
#8
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Fire Hoods for in-ceiling Atmos speakers
On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote:
On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? |
#9
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 06:06, jon wrote:
On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? in general fire barriers and structural integrity are good enough at the 45 minute mark, which is how long the twin towers lasted. 45 minutes is enough to get the people out - if they can be got out. Fire policy is part containment, part fast evacuation routes. The idea is to keep the fire contained until the people are out So a ceiling fire barrier stops the joists catching fire above it. For a while. If it's a concrete ceiling/floor above it, it is of course pointless. Most fire caps for lights and so on are ******** Half the time there are pipe runs and voids ready to carry fire up building interiors - or in the case of certain tower blocks - the outside as well -- Religion is regarded by the common people as true, by the wise as foolish, and by the rulers as useful. (Seneca the Younger, 65 AD) |
#10
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Fire Hoods for in-ceiling Atmos speakers
"Andrew" wrote in message ... Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore Its the other way around. It is intended to contain and stop a fire spreading in the void of a suspended ceiling should the fire start in the speaker. For PA systems they are usually called fire domes. |
#11
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 06:06, jon wrote:
On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? why have a FR ceiling then ? .... |
#12
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Fire Hoods for in-ceiling Atmos speakers
On 29/01/2021 18:22, Andrew wrote:
On 29/01/2021 14:34, Jimmy Stewart ... wrote: On 29/01/2021 14:19, Jimmy Stewart ... wrote: On 29/01/2021 13:22, Andrew wrote: Just noticed these in the Richer Sounds Clearance sale. I find it difficult to believe that this would provide 66 minutes of protection. The speaker itself will contain wiring and other plastic components that will be exposed the highest temperatures in a burning room below so will contribute to the fire. https://www.richersounds.com/clearan...4.html?instore nah they are fine.... common practice above FR ceilings for lights etc .... Speakers need a much bigger hole in the ceiling though. how long is a piece of string then ? ..... |
#13
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Fire Hoods for in-ceiling Atmos speakers
On 30 Jan 2021 at 08:11:52 GMT, ""Jimmy Stewart ...""
wrote: On 30/01/2021 06:06, jon wrote: On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? why have a FR ceiling then ? .... If it delays the roof timbers catching fire this may be useful. -- Roger Hayter |
#14
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 09:32, Roger Hayter wrote:
On 30 Jan 2021 at 08:11:52 GMT, ""Jimmy Stewart ..."" wrote: On 30/01/2021 06:06, jon wrote: On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? why have a FR ceiling then ? .... If it delays the roof timbers catching fire this may be useful. roofs don't attract a requirement for fire resistance.....unless an escape route is over them.... |
#15
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Fire Hoods for in-ceiling Atmos speakers
What about these?
https://www.thisoldhouse.com/seaside-victorian-cottage/22229639/s42-e11-design-elements - about 2 minutes in. (Speakers that go fully inside the ceiling space and are then plastered over). No idea what the fire risk is in a fully timber-framed structure, or what they would sound like. They don't mention the wattage, or the sound quality. -- Reentrant |
#16
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Fire Hoods for in-ceiling Atmos speakers
In article ,
David wrote: It is intended to contain and stop a fire spreading in the void of a suspended ceiling should the fire start in the speaker. Crikey. I've seen a few fried speakers - but one which went on fire? ;-) -- *Plagiarism saves time * Dave Plowman London SW To e-mail, change noise into sound. |
#17
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Fire Hoods for in-ceiling Atmos speakers
In article ,
Andy Burns wrote: Andrew wrote: I find it difficult to believe that this would provide 66 minutes of protection. https://www.richersounds.com/clearance-bargains/in-store/39/hoody-hoody4.html?instore They seemed to manage 90 minutes of testing https://www.mastdigital.co.uk/media/productattach//h/o/hoody_bs_en_1363_1.pdf If it prevents the sound from the speaker going elsewhere, it's going to effect the sound it makes too. The design of a speaker to go in a true infinite baffle like a ceiling is likely to be very different from one designed to go in a small sealed box. That's a beauty of ceiling mounting - a relatively inexpensive unit can sound quite good. Of course it's merely a comms speaker used for announcements etc it likely doesn't matter much. But this specifically mentions domestic use. -- *The sooner you fall behind, the more time you'll have to catch up * Dave Plowman London SW To e-mail, change noise into sound. |
#18
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Fire Hoods for in-ceiling Atmos speakers
On 30 Jan 2021 at 09:45:13 GMT, ""Jimmy Stewart ...""
wrote: On 30/01/2021 09:32, Roger Hayter wrote: On 30 Jan 2021 at 08:11:52 GMT, ""Jimmy Stewart ..."" wrote: On 30/01/2021 06:06, jon wrote: On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? why have a FR ceiling then ? .... If it delays the roof timbers catching fire this may be useful. roofs don't attract a requirement for fire resistance.....unless an escape route is over them.... There may be no requirement, but I'd generally prefer mine not to be on fire given a choice. -- Roger Hayter |
#19
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 11:56, Roger Hayter wrote:
On 30 Jan 2021 at 09:45:13 GMT, ""Jimmy Stewart ..."" wrote: On 30/01/2021 09:32, Roger Hayter wrote: On 30 Jan 2021 at 08:11:52 GMT, ""Jimmy Stewart ..."" wrote: On 30/01/2021 06:06, jon wrote: On Fri, 29 Jan 2021 16:00:17 +0000, Jimmy Stewart wrote: On 29/01/2021 15:46, Brian Gaff (Sofa) wrote: Cannot see it but to my mind once the room is alight enough to cause that sort of need you are pretty stuffed anyway and should be in the street with your mobile waiting for the fire engine. Brian but one hour FR gives the people on the floor above time to ext..... What people on the floor above ? why have a FR ceiling then ? .... If it delays the roof timbers catching fire this may be useful. roofs don't attract a requirement for fire resistance.....unless an escape route is over them.... There may be no requirement, but I'd generally prefer mine not to be on fire given a choice. good for you...I like people who go further than the building regs require....not many about |
#20
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 11:56, Roger Hayter wrote:
roofs don't attract a requirement for fire resistance.....unless an escape route is over them.... There may be no requirement, but I'd generally prefer mine not to be on fire given a choice. I think that is a reasonable attitude. Do what you can to limit speed and spread of fire as well as ensuring escape depending on what is above the ceiling a box of plasterboard stuffed with rockwool would give a nice bass as well as fire resistance. glue it together with plaster or car body filler But you will need access from above to make a good job... -- "It is an established fact to 97% confidence limits that left wing conspirators see right wing conspiracies everywhere" |
#21
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Fire Hoods for in-ceiling Atmos speakers
"Dave Plowman (News)" wrote in message ... In article , David wrote: It is intended to contain and stop a fire spreading in the void of a suspended ceiling should the fire start in the speaker. Crikey. I've seen a few fried speakers - but one which went on fire? ;-) Its not the voice coil of the speaker that causes the problem, but on 100V line systems it's usually the matching transformer that can go AWOL. And on a large system, all that audio power can heat up the transformer fairly quickly. |
#22
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 07:03, David wrote:
https://www.richersounds.com/clearan...4.html?instore Its the other way around. It is intended to contain and stop a fire spreading in the void of a suspended ceiling Yup should the fire start in the speaker. Fire spreading from anywhere below is more likely the reason for installation. Ceilings are normally a fire barrier protecting the room above, unless someone pokes holes in them for speakers and downlighters. An intumescent material (one that swells when heated to block up gaps) is part of the blanket, which is also fire retardant. For PA systems they are usually called fire domes. -- Adrian C |
#23
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Fire Hoods for in-ceiling Atmos speakers
On 30/01/2021 11:26, Dave Plowman (News) wrote:
In article , Andy Burns wrote: Andrew wrote: I find it difficult to believe that this would provide 66 minutes of protection. https://www.richersounds.com/clearance-bargains/in-store/39/hoody-hoody4.html?instore They seemed to manage 90 minutes of testing https://www.mastdigital.co.uk/media/productattach//h/o/hoody_bs_en_1363_1.pdf If it prevents the sound from the speaker going elsewhere, it's going to effect the sound it makes too. The design of a speaker to go in a true infinite baffle like a ceiling is likely to be very different from one designed to go in a small sealed box. That's a beauty of ceiling mounting - a relatively inexpensive unit can sound quite good. Of course it's merely a comms speaker used for announcements etc it likely doesn't matter much. But this specifically mentions domestic use. (Dolby) Atmos speakers are intended to be part of an "object based" surround sound system - so are usually "proper" hifi units rather than your typical tannoy style ceiling mount or 100V line system speaker. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#24
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Fire Hoods for in-ceiling Atmos speakers
In article ,
David wrote: "Dave Plowman (News)" wrote in message ... In article , David wrote: It is intended to contain and stop a fire spreading in the void of a suspended ceiling should the fire start in the speaker. Crikey. I've seen a few fried speakers - but one which went on fire? ;-) Its not the voice coil of the speaker that causes the problem, but on 100V line systems it's usually the matching transformer that can go AWOL. And on a large system, all that audio power can heat up the transformer fairly quickly. I doubt many use 100v line domestically. With older low voltage lighting, you could have load of transformers in a ceiling void. And I can see one of those catching fire long before a 100v line type. -- *It is wrong to ever split an infinitive * Dave Plowman London SW To e-mail, change noise into sound. |
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