Minimum dimensions for edge elements?

[JF.]

Hello!

Is there a minimum width for edge elements that is recommended when they are cut? My slab will be 2.7x5m, which results in needing 2 pieces of 20cm and 2 pieces of 30cm.
Is it common to cut two elements so you get 70+70cm instead of 120+20cm?

 

[Mikael_L]

The edge elements have no structural function.
They are primarily meant to act as a mold.

So the issues you might have with short pieces involve getting them in place straight and well and ensuring they stay in place during the casting.

Then there's an aesthetic aspect.

I haven't found any rule about minimum length and never heard of such a thing.

So I think you should consider these three questions.
What do you think about the appearance with two seams in the foundation close to each other?
And how do you ensure that a short piece is straight and at the same height and well-positioned during installation and casting?
Don't forget that foam sealant is your best friend here.

 

[JF.]

The edge elements have no load-bearing function.
They are primarily meant to act as a casting mold.

So the problems you might encounter with short pieces are about getting them properly in place and ensuring they stay put during the casting process.

Then there's an aesthetic aspect as well.

I have not found any rule about minimum length and have never heard of such a thing.

So I think you should consider these three questions.
What do you think about the appearance with two joints in the foundation close to each other?
And how will you ensure that a short piece is straight, at the same height, and properly aligned during installation and casting?
Don't forget that foam sealant is your best friend here.

The smallest piece ended up being 26cm, and it looked just fine.