#21  
Old 08-06-2008, 10:37 AM
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Location: Cambridge, UK
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Default Re: Casting?

Hmm - the stainless needles will only be able to go vertically, though, right? It seems I need something that's going to go around in a band.

It sounds like I'm likely to crack whatever I do though with a castable vent. Shame I'm having trouble source angle iron or I'd to that to form the vent and build up with the firebrick to a flue.
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  #22  
Old 08-06-2008, 02:17 PM
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Default Re: Casting?

Angle iron shouldn't be a problem. The places that do structural steel (for the building trades) should be able to get you a piece if your hardware store can't. They call hardware stores ironmongers in the UK after all.
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  #23  
Old 08-07-2008, 02:42 AM
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Location: Cambridge, UK
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Default Re: Casting?

Well, I got my rebar from a nice but huge place that does large scale builds - they hadn't got any angle iron in stock, oddly enough. The other building places don't seem to have it either which confuses me. Now I only want a 28" section it seems more difficult to get - I can find 2m sections on ebay, not sure what I'd do with the rest of it!

I need to talk to some local fabricators I think!
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  #24  
Old 08-07-2008, 10:52 PM
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Default Re: Casting?

S/S needles are about 1" long and form a woven matrix in all directions when mixed in your castable.
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