No cranes used then, started in 1967 A ring of scaffolding about 50 ft deep around the working area and a hoist to raise workers and cement. Cement tipped into wheelbarrows and moved/poured by labourers. On my site, towers were384 ft high and the main chimney was 650 ft.
All 6 towers have now been demolished, coal fired boiler gone, only gas fired remaining.