Assuming the concrete around the pip is solid then that mix you get for
fence posts works well for this. A chap down the road did it on the steps up
from his gat to the garden over 10 years back now. Brian

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The Sofa of Brian Gaff...

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On Saturday, 15 August 2020 18:07:19 UTC+1, David wrote:
Had some garden steps built a couple of years ago and we now have a
steel handrail to install.

I think molten lead was used to fix railings into stone, traditionally.
Not sure if it's strong enough on its own for a handrail.

Owain