mouldable firebrick in a form?

Without being quite clear about the geometry, do you really need firebrick properties here? And what sort of load is it supporting? When I reinstated an inglenook by removing georgian *and* edwardian structures, I took out an arch about two feet wide made from 2 inch x

By its nature, a lintel will normally have tensile stresses on the bottom face. Firebrick isn't good in tension.

newshound wrote in news: snipped-for-privacy@brightview.co.uk:

My mistake - I should have said "throat-forming lintel" rather than "throat-supporting". It will hardly be supporting any load at all. There is a concrete lintel in the wall about 15cm above it, and I think there is a steel arch directly above where it will go. (I'm not at the house and can't check.) The idea is to have it the same shape as one of these, but wider:

The fireplace will be 24" wide and 12" deep; unless I change my mind, I'm not taking it right back to the builder's opening.

Harry

You can buy refractory cement and refractory concrete. No rebar should be used Eg

"harryagain" wrote in news:l39ead$etc$ snipped-for-privacy@dont-email.me:

Thanks for this. The same manufacturer also makes mouldable firebrick. Are you saying the mixable stuff would be better, if I'm going to put it in a form? That may sound like a silly question, but I've not worked with either material!

Best,

Harry

"harryagain" wrote in news:l39ead$etc$ snipped-for-privacy@dont-email.me:

Thanks for this. I've been thinking about this some more. My options for making the throat-forming lintel seem to be

And the two issues seem to be:

I'd appreciate further advice on any of this.

To recap: I'll be making a throat-forming lintel for a 24"- (possibly

but 6-9" wider. The width of the throat itself will be about 10-12cm.

Harry