Lintel type indentification

garyo · 3 Jun 2020

What kind of lintel is this? If you look closely, it's not possible to set a block in at the back, and yet it appears to be a cavity lintel.

I don't see it on the Catnic site any more, so is this an obsolete type of cavity lintel from before the thermal design was improved, or are they still used in niche cases such as over a garage door where you don't have thermal requirements, and yet there may be a cavity wall for a second storey above?

Thanks

^woody^ · 3 Jun 2020

Set a block in where?

noseall · 3 Jun 2020

^woody^ said:
Set a block in where?

Some XHD lintel designs (Birtley) have a slot for a block to sit within the lintel.

The one shown is the Catnic boot fella.
I prefer the inverted u/v shaped fellas, so as to allow fixing into a block above windows etc.

stuart45 · 3 Jun 2020

They were the original Catnic lintels. I thought they were stronger than the newer ones. Years ago I asked someone from the Tech services about the difference and he told me that they were more expensive to produce.

garyo · 3 Jun 2020

stuart45 said:
They were the original Catnic lintels. I thought they were stronger than the newer ones. Years ago I asked someone from the Tech services about the difference and he told me that they were more expensive to produce.

That's my thinking too - and the thermal bridging seems much worse, not to mentioning hitting steel when you want to put up a curtain pole.

garyo · 3 Jun 2020

^woody^ said:
Set a block in where?

In the back like this more modern one:

^woody^ · 3 Jun 2020

That's a heavy duty boot lintel and were never the norm - in fact a right pain. So not modern or old fashioned, just different.

noseall · 3 Jun 2020

^woody^ said:
That's a heavy duty boot lintel and were never the norm - in fact a right pain. So not modern or old fashioned, just different.

Birtley still turn them out (HD) and yes - a stupid PITA trying to wriggle a block in there and actually getting any bedding mortar around the block.

Stupid, stupid design.

Stupid.

garyo · 3 Jun 2020

I can't see how you'd ever get a block in. It only looks like a 20mm deep recess to me.

noseall · 3 Jun 2020

garyo said:
I can't see how you'd ever get a block in. It only looks like a 20mm deep recess to me.

Not in your example no. XHD's (Birtley) examples - yes. Deep enough to accept a block and a stupid design.

I remember my gaffer buying some batten clips for the old boot Catnic lintels. They were shaped pieces steel for clipping pieces of lath to the Catnic perforated back. Didn't even know what dabbing was back then.

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Lintel type indentification

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