I'm intending to use some spare concrete paving slabs I have stashed away at the very back of my garden, to load test a piece of home built lifting equipment. I don't have anything suitable to actually check the weight of the slabs, nor have I been able to find any specs on the Internet.
The slabs are standard 2x2 and 2x3 concrete slabs. All I need is a rough idea of their weight, to enable me to conduct the tests on the unit. The unit is an home designed and built single post motorcycle lift.
approx
2x2 = 6½ stone 3x2 = 10 stoneprobably a touch lighter!
on 12/05/2007, Stuart supposed :
Thanks, that will be quite near enough for my purposes.
Generally speaking and good for rough calculations, all stone, rock, concrete weighs 10 stone per cubic foot. ( i think some heavy granites can weigh just over 11.)
================================== A bathroom scale will easily cope with the weights you want to measure.
Cic.
Very useful rule of thumb!
Just checked it - comes out at 2260Kg m^3, so sounds about right for concrete.
That's not too far away. I work on 2360kg/m3 for plain dense concrete and 2400kg/m3 for reinforced concrete. And I'm a structural engineer, so I must know what I'm talking about !
The message from " snipped-for-privacy@gglz.com" contains these words:
Yes, I have decided to use it in the future if only I can remember it. In the past I have used a rather rougher measure - a density of 2 - but that comes out as 8.9 stone per cubic foot which seems rather light in retrospect.
Harry Bloomfield has brought this to us :
Thanks for the responses..
The result of the test load lifted to maximum height was successful. I did it on grass just in case anything did happen to break, then everything would have a softer landing.
On the grass (normally it would be on smooth concrete) it was quite wobbly adding to the stress on the framework, plus I added my own body weight to the test load - so I think I can safely say it will easily cope with the bike.
concrete weights approx 2400kg per m3, so now you can work it out.
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