To Russell and others.
I do have a copy of Marryatt's later book and the tabulated results
corresponding to Russell's are :- 1 head 64.55 %
2. 15.86
3. 6.13
4. 3.21
5. 2.09
This is up to 1986.
It is a very long table recording fire up to 113 heads
Fires controlled 99.46 % Australia and New Zealand statistics
John Powell NZ
Sent from my iPad
> On 19/09/2014, at 1:19 pm, Frans Stoop <[email protected]> wrote:
>
> Russell,
>
> Thanks!
> That's an interesting source of figures indeed.
>
> Met vriendelijke groet / Best regards,
>
> Frans Stoop
> TOS architecture & fire protection
> Netherlands <[email protected]>
> Tel. +31-24-324 0112
>
>
> At 15:35 18-9-2014 +1200, you wrote:
>> When I joined Wormald in New Zealand 50 years ago they used this type of
>> table in the promotion of Fire Sprinkler systems.
>> The figures came from the records that Wormald kept on all sprinkler fires
>> in Australia and New Zealand. I also think that Mather and Platt did a
>> similar record in the UK.
>>
>> In the book "Fire - Automatic Sprinklers in Australia and New Zealand 1886 -
>> 1968" by Harry Marryatt there is very good analysis of that time period. It
>> was updated his 1986 edition which I think was called "A Century of Fire
>> Sprinklers"( I don't have a copy of the later book).
>> The figures in 1968 were;
>> 66.6% 1 head
>> 15.6% 2 heads
>> 5.9% 3 heads
>> 3.2% 4 heads
>> 1.6% 5 heads
>> So 93% of sprinklered fires were 5 heads or less.
>> There were 5720 recorded fires in this study.
>> Satisfactory operation was 99.76% with 0.24% unsatisfactory incidents (14)
>>
>> Wormald still keep a record of sprinkler saves on our systems, but the NZ
>> and Australian Fire Protection Associations and the NZ Fire Service try to
>> keep a full list, but it lacks the Technical Detail that was recorded for
>> over 100 years in the Wormald record.
>>
>> Trust this is of interest.
>> Russell Gregory
>> Christchurch, New Zealand
>>
>> -----Original Message-----
>> From: Sprinklerforum [mailto:[email protected]]
>> On Behalf Of Frans Stoop
>> Sent: Thursday, 18 September 2014 4:53 a.m.
>> To: [email protected]
>> Subject: Sprinkler statistics
>>
>> Gentlemen,
>>
>> Once I saw a sprinkler statistic table saying something like this (I don't
>> remember the exact percentages):
>>
>> Regarding fires that are succesfully controlled by sprinklers
>> 50 % of the fires by 1 sprinkler
>> 66 % of the fires by 1 or 2 sprinklers
>> 75 % of the fires by upto 3 sprinklers
>> 80 % of the fires by upto 4 sprinklers
>> 83 % of the fires by upto 5 sprinklers
>> etcetera...
>>
>> Does anyone recognize this table?
>> If so, any idea where I can find it?
>>
>> I already found some statistics on the NFPA, AFSA, FM, SFPE and CIBV
>> websites, but couldn't find this simple table.
>>
>> Met vriendelijke groet / Best regards,
>>
>> Frans Stoop
>> TOS architecture & fire protection
>> Netherlands <[email protected]>
>> Tel. +31-24-324 0112
>
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