lintel (catnic) question

dilly · 20 Jul 2010

Hi at the moment i am in process of building a 2 storey extention,i was wondering wether the standard catnic with the 100mm cavity is suitable for holding up the second storey the span is 2m looking at the catnic it dont look that strong or is there a particular one i should be using
Thanks

RonnyRaygun · 20 Jul 2010

Depends on weight of masonry you are using (brick, block, thermalite?) span of lintel, floor loads, any openings and their distance from the lintel.

hotrod · 21 Jul 2010

dilly said:
i was wondering wether the standard catnic with the 100mm cavity is suitable for holding up the second storey the span is 2m

Depends what you mean by "standard catnic" if you're thinking of the Cougar:-

Then yes, in a standard domestic application, with no weird loadings, it'll be fine.

Static · 21 Jul 2010

As hotrod says, they are fine for basic loadings.. but as a rule of thumb if your floor span above is more than about 4-4.5m then you might wanna look at a CGH version.. Simplest method to check is phone catnic if in doubt..

edit: should probably add this is based on standard 100 block 100 brick cavity wall and timber floor at upper floor.. with no major windows on floor around the proposed opening

dilly · 21 Jul 2010

Thanks lads phoned keystone tech today they have spec a hdk-90(heavy duty lintel)its only gonna cost me £30 more than standard so i will go with that thanks again

noseall · 21 Jul 2010

dilly said:
Thanks lads phoned keystone tech today they have spec a hdk-90(heavy duty lintel)its only gonna cost me £30 more than standard so i will go with that thanks again

Are you sure that's not £30 per metre more?

HD lintels are rather expensive.

DSA · 21 Jul 2010

Has your engineer not provided lintel references on their drawing?

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lintel (catnic) question

dilly

RonnyRaygun

hotrod

Static

dilly

noseall

DSA

DIYnot Local

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