In an earlier contribution to this discussion,
wrote:

How much does a 'standard' 600mm x 900mm paving slab weigh
(approximately)? I want to know so I can guesstimate how many I can
put in the back of my car.

If you're talking about the pressed granite sort used by local authorities,
I always reckon that a 2x2 weighs a hundredweight, and a 3x2 a hundredweight
and a half.

On that basis, one of your 600x900 (nearly a 3x2) will be about 70Kg.

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Cheers,
Set Square
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