Essve Concrete Screw

[Johan Gunverth]

I have acquired a box of Essve Concrete Screws to secure nail battens on Leca blocks in the basement. They are 112mm long with a countersunk T30 head.
How good are they? Has anyone seen long-term changes? I seem to remember that MathiasS has tested them. Anyone else?

http://www.essve.com/templates/Page.aspx?id=11480

 

[anaitis]

It is really not intended for Leca or lightweight concrete.
Do a test and you'll see how much it can withstand.

 

[Johan Gunverth]

Will test some tensile strength. According to Essves' product declaration, it is also suitable for lättbetong.

 

[injonil]

I bought these lightweight concrete plugs at Biltema when I was attaching the plastic moldings above the Isodrän on the basement walls which are made of Leca: http://www.biltema.se/sv/Bygg/Plugg/Haltegel/Lattbetongplugg-25-st/

Worked very well!

 

[MathiasS]

You have the wrong screw, Johan, sitting with the big Essve catalog on my lap.

The screw I have (correctly) used, which is intended for lightweight concrete, leca, etc., is called "Lättbetongskruv." The lightweight concrete screw is driven in without pre-drilling and is also available in a variant for Induprog frame sleeves.

The concrete screw you have is intended for concrete, brick, or hollow block and requires pre-drilling, but you can skip the plug. It also comes in a variant for the Induprog sleeves.

What I have mounted with the lightweight concrete screw is still holding tight as a rock.

 

[Johan Gunverth]

You're using the wrong screw, Johan, I'm sitting here with the big Essve catalog in my lap.
...

Do you have a picture (link) of the right screw?

 

[MathiasS]

We should be able to arrange that:

http://www.essve.com/templates/EframePage.aspx?id=3535

Fastening, lättbetongskruv....

 

[Johan Gunverth]

We should be able to arrange that:

[link]

Infästning, lättbetongskruv....

Thanks! What annoys me a bit is that I was recommended the concrete screw by an otherwise very serious dealer (professional store) here in Gothenburg. They also had a test station with lots of these screws driven into Leca blocks. Anyway, the "wrong" screw is rock solid. I loaded it with a jack, which resulted in the fastening plate breaking. Should work.

This is the screw:
http://www.essve.com/templates/EframePage.aspx?id=3535

 

[corre]

Anyway, the "wrong" screw is rock solid. I have applied tension to it with a jack, which resulted in the mounting bracket breaking. So it should work.

Are you going to fasten the studs with the screw all the way through or with an angle bracket? I can imagine that the length (112mm) with the thin metal bracket means you still get a large surface area, and with the relatively small force that arises (and is also distributed among many screws) it shouldn't be a problem.

 

[Johan Gunverth]

The idea is to screw lying 28x70 directly into the Leca with maybe c/c 600 and a piece of tar paper behind. The space is dry.

 

[MathiasS]

I see that it's not really working to link to a specific product in the Essve catalog (order a paper copy, it's actually really good).

I guess there's not much difference between these screws anyway, at least not in leca. It might be worse to do the opposite. However, it's always a bit frustrating to get less accurate tips from someone who should know better.

 

[Johan Gunverth]

Now then (pick the frame with the content).

http://katalog.essve.se/webspeed/katalog/kat_produkt.p?bid=V70&kat_bid=V70&dokid=wc398272