mounting board

[ColJack]

BAS, aluminium melts at about 660C.. aluminium oxide melts at about 2000C.. so while the "skin" would remain somewhat solid, the insides will melt and sag..

try it with a can ringpull in a candle flame..

 

[ban-all-sheds]

You're right - I was getting mixed up with the temperature required for smelting.

I submit though that if the area surrounding your meter had reached the melting point of aluminium you'd either be long gone, or would already have been in deep trouble for some time...

 

[Zambezi]

Most of the intumescent products only start swelling/expanding long after you would be dead.

 

[RF Lighting]

It will burn in the right circumstances, but I think it needs other fuels to be present.

Anyway - with a melting point around 2000°C it probably counts as fireproof: http://cgi.ebay.co.uk/AP0473-Alumin...QihZ001QQcategoryZ98641QQcmdZViewItem[/QUOTE]

I think the fact that it conducts electricity is possibly an issue there bas...

Have you never mounted a DB or panel board on unistrut?

 

[VanSolo]

Or Dexion. He says as zimmer creaks.

 

[RF Lighting]

I think I read about that stuff in a history book once

 

[ban-all-sheds]

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[VanSolo]

I had to trawl through five years of threads to pinch that idea! Ah well it's a fair cop guvnor.

 

[bernardgreen]

In 1981 we were thinking about using tumescent varnish to fire protect structural beams in the house we were building. The notes say it expands only when heated by direct contact with hot air or by intense radiated heat. This suggests that tumescent material behind the meter or other equipment would not expand as it was not exposed to heat. So the equipment would probably stay attached to the board with "foam" surrounding it.

But there is also mention of a tumescent material that operates in a chain reaction mode where once any part of it is heated above trigger point the chemical reaction spreads through the material and even cold areas tumesce.

 

[ban-all-sheds]

The whole purpose of intumescent material is to swell and seal apertures to prevent or slow the spread of fire.

So no matter how it behaves in a fire, what would a piece of intumescent board on a wall actually do when it expanded?

 

[bernardgreen]

The whole purpose of intumescent material is to swell and seal apertures to prevent or slow the spread of fire.

Or to create a foamed coating over structural components to prevent or delay their combustion / weakening in a fire

So no matter how it behaves in a fire, what would a piece of intumescent board on a wall actually do when it expanded?

It may expand enough to wrap around and protect components that are mounted on it.