Chris J Dixon Wrote in message:
John Rumm wrote:

Indeed - at that weight its more like shifting heavy machine tools in a
workshop. Lots of small movements with lots of leverage, and propping /
supporting at every stage.

An issue which hasn't been mentioned yet is the strength of the
slab. Is there is any danger of it fracturing under its own
weight if only supported at the edges whilst being moved?

Chris

I'd be rather surprised if it broke under its own weight, but I
think excess lifting strain concentrated in small areas could do
it eventually, though it would have to be a few tons of force (or
a pre-existing fracture line/fault)... I shall take it steady &
spread out my tackle! :-)
--
Jim K


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