On 09/07/2019 14:05, 'Brent Efford' via TramsDownUnder wrote:
> Modern practice is to have the overhead support structure in two parts: a foundation of reinforced concrete with a flange connection at ground level and a galvanised steel mast bolted to it, generally well after the foundation is created.


This method is occasionally used in Melbourne - including at some parts of New Preston as illustrated.

I have no clear idea of what determines the method, but suspect it is to do with cost and difficulty of replacement 'next time'.

Mal Rowe