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.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

50mm thick ?

approx
2x2 = 6½ stone
3x2 = 10 stone

probably a touch lighter!




"Harry Bloomfield" wrote in message
...
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.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

on 12/05/2007, Stuart supposed :
50mm thick ?

approx
2x2 = 6½ stone
3x2 = 10 stone

probably a touch lighter!

Thanks, that will be quite near enough for my purposes.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"Stuart" wrote in message
...
50mm thick ?

approx
2x2 = 6½ stone
3x2 = 10 stone

probably a touch lighter!


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.)

On Sat, 12 May 2007 15:59:20 +0100, Harry Bloomfield wrote:

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.

==================================
A bathroom scale will easily cope with the weights you want to measure.

Cic.

--
===================================
Using Ubuntu Linux
Windows shown the door
===================================

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.)

Very useful rule of thumb!

Just checked it - comes out at 2260Kg m^3, so sounds about right for
concrete.

wrote:
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.)

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 .com
from " contains these words:

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.)

Very useful rule of thumb!

Just checked it - comes out at 2260Kg m^3, so sounds about right for
concrete.

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.

--
Roger Chapman

Harry Bloomfield has brought this to us :
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.

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.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

concrete weights approx 2400kg per m3, so now you can work it out.


"Harry Bloomfield" wrote in message
...
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.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk