Hello,
I'm facing the task of moving a basement staircase and will need to create an opening down to the basement.
The basement ceiling is made of a framework of blåbetong that needs to be removed.
These building blocks are 50cm wide and about 4-4.5m long and according to the drawings 10cm thick (difficult to know exactly as they are 1mm on the drawing).
Is there anyone here who has an idea of what these might weigh?
I have an idea that one could build something underneath to support them and then cut them lengthwise into more manageable sizes.
I'm facing the task of moving a basement staircase and will need to create an opening down to the basement.
The basement ceiling is made of a framework of blåbetong that needs to be removed.
These building blocks are 50cm wide and about 4-4.5m long and according to the drawings 10cm thick (difficult to know exactly as they are 1mm on the drawing).
Is there anyone here who has an idea of what these might weigh?
I have an idea that one could build something underneath to support them and then cut them lengthwise into more manageable sizes.
Could it be 500kg each?
It can also be 750 if the floor is thicker.
Even if it's 60 cm wide, it will be a bit heavier.
It can also be 750 if the floor is thicker.
Even if it's 60 cm wide, it will be a bit heavier.
I didn't give you a how long is a piece of string answer. Estimate about 2.4 or 2.5 tons/cubic meter, then you can get the answer yourself. I think 10 cm is a bit too thin, I rather believe it's 15 or 20 cm thick.
Didn't mean to comment on your answer.harry73 said:
I'll start taking up the wooden joist that's on top in about a week, and after that, I can drill a hole to measure the thickness.
I'm still thinking about building something or setting up scaffolding underneath to support when you start cutting into more manageable blocks.
Be careful when you start tearing into such heavy things.
The bulk density of reinforced light concrete cassettes is at most 0.65 kg/dm3. 5x45x1=225x0.65=146.25 kg.
But do you believe in a thickness of 10 cm?J justusandersson said:
It feels thin. After a quick check in the old Bygg II, I think that 15-20 cm (leaning towards 20) is more realistic. But there are many parameters, not least which live load is relevant in this case.
Ours are 21 cm.
A caveat is also that you need to transfer the load in some way when you make such a large hole in them. I recommend that you let a designer do that. Such an intervention also requires a building permit, for which structural calculation should be a prerequisite.
A caveat is also that you need to transfer the load in some way when you make such a large hole in them. I recommend that you let a designer do that. Such an intervention also requires a building permit, for which structural calculation should be a prerequisite.
The "simplest" is probably to pick up, for example, two tiles and replace them with shorter variants, which then need a new support in some form.