Shuttering concrete

briaineo

Hi

Just a question if a type of product is available not a structural question.

I have to widen a 3 ft high wall by approx 150mm that will eventually bear the weight of a 3x1 m window.

Question I have is; is there a product available similar to sleeve bolt that would allow the concrete to “tie in” with the existing wall? Or is there a product that may attach to the top of a sleeve bolt that does same?

Thanks

Max Moment

briaineo wrote: »

Hi

Just a question if a type of product is available not a structural question.

I have to widen a 3 ft high wall by approx 150mm that will eventually bear the weight of a 3x1 m window.

Question I have is; is there a product available similar to sleeve bolt that would allow the concrete to “tie in” with the existing wall? Or is there a product that may attach to the top of a sleeve bolt that does same?

Thanks

Do you need the full width of wall extended or would a steel angle bolted to the existing wall work to support your window? You could flush out the wall with dry lining or similar if internal if required

Tefral

You need to dowel the new with the old. So you need to drill in holes into the existing wall and fit rebar with non shrinking grout. You leave that dry and then shutter and pour your concrete.

briaineo

Thanks Tefral

This is a current new build and i’m rectifying (trying to) a mistake.

It’s only the outside wall that needs widening, the window is eight 3x1 m sections in a curve; forgot to mention the curve part.

I’m getting my engineer to spec it but if I send him a solution he approves or tells me a different way. Approval takes a few mins - if I don’t have any ideas it takes much longer!

I will dig down to foundation level and insert rebar vertically but it’s the face of the wall that i’m thinking requires solid fixings.

Any idea of a product available?

Tefral

If you dowel at the foundations and maybe use an ancon wall starter tied to the blockwork. I'd tie a longer piece of rebar vertically to the dowel and tie it to the wall starter straps then. It definitely won't move but it's more to stop any cracking.

Metric Tensor

There's a range of chemical anchor options out there OP that can be used to anchor rebar or a wide range of other types of tie. More versatile than an expanding shield bolt but v important to get your engineer to specify ancorage, size, spacing, type, etc.

Also remember there's a HSA Code of Practice for all safety critical anchors - remind your engineer too as he'll have to fill in at least one of the forms.