Strongest fastening in Leca?

[Johan Gunverth]

I need to make really strong attachments in a 30cm Leca foundation wall and am simply wondering which product or technique is the strongest. In this context, it is predominantly axial load with supporting brackets, so various plug solutions are out.

I have looked at Hilti's HIT, which feels perfect, but requires expensive injection guns. I have also done a test with an M8 threaded rod in an 8-9 mm hole and Tremco's PU204 (regular PU construction adhesive). It holds like a rock, but I am unsure about long-term durability.

Any tips?

 

[PCLarsson]

Anchor mortar?

http://www.fischersverige.se/Portal...tning/_dokument/Kapitel_kemisk_infastning.pdf

 

[snaggletooth]

Through bolt is hard to beat but might not work so well for you.

 

[Johan Gunverth]

Through bolt is hard to beat but may not work so well for you.

Correct. It is partially underground.

 

[spiskrok]

http://www.wurth.se/Produkter/Produ...e/Fjaderbelastad-plugg/Vikankare-W-KD-TB/?p=1

If possible, it should be good.

 

[Johan Gunverth]

[link]

If it works, it should be good

Only works with walls that have cavities. Not Leca.

 

[Enk Projektet]

Google Lecaplugg...

Image of it...


Maybe this could be something too.....

http://www.norwesco.se/page/350/362/660

 

[verktygsgurun]

Lightweight concrete screws grip like hell, wouldn't that work? http://m.youtube.com/watch?v=vbXEwLUlnjI&desktop_uri=/watch?v=vbXEwLUlnjI

 

[MathiasS]

Johan, what does the item you are hanging up weigh?

For heavier items, I have used long wall plugs or Essve's lättbetongskruv. Both hold really well. I think the plug is the better option.

 

[spiskrok]

Works only with walls that have cavities. Not Leca.

Now you probably need to explain what you mean.

 

[Johan Gunverth]

Johan, what is the weight of what you are going to hang up?

For heavier items, I have used long facade plugs or Essve's lightweight concrete screws. Both hold really well. I believe the plug is the better option.

Workbench and bench cabinets in plywood underneath it. Each attachment will be loaded up to ~50 kg (~500N) with a pulling force. 2 per 80 cm bench cabinet. I like Essve's lightweight concrete screw, but here you must avoid a completely rigid attachment. My experience with that screw is that it is rock solid until something loads it radially. Then it loses some of its grip. If I need to have the possibility of point loading the bench with, e.g., blows from a sledgehammer. Glue or chemical anchors flex and spring a little (very little) and that I am convinced is better in this context.

 

[Johan Gunverth]

Now you probably need to explain how you mean.

Well, it's a vikankare that needs a bit of space to "unfold." It doesn't work in a drilled hole in a solid Leca wall.

 

[spiskrok]

yes of course, but I meant that you should drill through the leca not stop in the middle.

 

[cjnilsson]

This contains quite a lot of information, I think the konborret together with the centreringshylsa and ankarmassa looks interesting. Otherwise, it seems like it works quite well with type SX plug in slightly larger dimensions
http://www.fischersverige.se/PortalData/10/Resources/fischer_se/pdf_dokument/Handbok_web.pdf

 

[MathiasS]

It is probably difficult to build something completely silent where you can pound with a sledgehammer without having legs on the bench. The bench is probably not completely silent either.