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Welcome to our new members / Re: Change of email
« Last post by AnthonyB on November 18, 2018, 10:14:51 PM »
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Welcome to our new members / Re: Change of email
« Last post by AnthonyB on November 18, 2018, 10:04:46 PM »
Hi,

You'll have to contact the admin, whilst I have moderator rights it's limited to getting rid of spam posts etc.
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Welcome to our new members / Change of email
« Last post by Temp on November 18, 2018, 12:46:39 PM »

Sorry to be a pain but something went amiss with my password.

Unfortunately I couldn't retrieve it because there was an old password registered with the site and no link I could find to contact admin to up date it.

In short ..... is it possible to update my email address from dave@ctafire.co.uk to david@ctafire.co.uk on my user account "David Rooney" so I can get retrieve my password and get back in please  ;D ;D ;D

Thanks
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Technical Advice / Re: Replacement period for fire alarm control boxes
« Last post by Mike_upstairs on November 14, 2018, 11:48:26 AM »
Cheers! ;D
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Technical Advice / Re: Calculating tenability of radiation
« Last post by Fishy on November 13, 2018, 08:58:10 AM »
It's been a while since I've done these, but it doesn't look right to me.  There's no emissivity in the equation, nor is there a configuration factor.  What you've got looks similar in form to the calculation for an emitted heat flux (I1 = εσT4), if you had assumed an emissivity of one, but that doesn't tell you what's falling on the 'receiver' (i.e. the occupants).

If I recall correctly, the SFPE Handbook is the 'go to' reference for this type of calculation.
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Technical Advice / Re: Replacement period for fire alarm control boxes
« Last post by Fire Monkey on November 12, 2018, 09:02:54 PM »
If you end up replacing the panel make sure its open protocol and not closed - that way you can get any qualified company to service it. If its closed you re stuck with the installer......
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Technical Advice / Re: Calculating tenability of radiation
« Last post by Tom Sutton on November 12, 2018, 04:20:18 PM »
My mathematics is limited to long division but a very long time ago we use to use a nomogram to measure the safe width of corridors, the information in the paper may be relevant to your OP.

Check out www.iafss.org/publications/frn/765/-1/view/frn_765.pdf you never know.
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Technical Advice / Re: Calculating tenability of radiation
« Last post by lyledunn on November 12, 2018, 08:11:46 AM »
I am not familiar with the formula. However, in dynamic context any constant involved surely means that the validity of the outcome is time limited?
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Technical Advice / Calculating tenability of radiation
« Last post by GB on November 11, 2018, 06:34:49 PM »
I have a scenario where I am trying to measure the radiative heat transfer and subsequent tenability within an open plan apartment and the relationship between cooking facilities and the means of escape.

I am considering using the calculation where:

q=Stefan-boltzman constant x T(absolute temp in Kelvin) x A (area of emitting body)

Would the forum agree this is the correct formula or is there another formula to prove that the radiative heat does not exceed 2.5Kw/m2?

If anyone has used this formula, is the temperature measured at the source of at the various points along the MoE?
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Technical Advice / Re: locked final exit gate
« Last post by lyledunn on November 09, 2018, 08:44:03 AM »
I assume that this gate is used also for entry, hence the electronic lock. If it were my job, I would design it out if at at all possible. If that could not be done a push bar mechanism should be fitted. Licensing here would not sanction any door that is not free from fastenings albeit that I know of many private members clubs that have electronic entry fobs.
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