Pillar to Beam
Levelling
This is just an idea of how the levelling is done, In the first image, the pipe is not yet set at the required height.
Second pillar finished though levelling seeming accurate at setting, top now seems some 6mm higher. I have a continuing problem in that the water levels are inconsistent ?? Still 6mm over 6.4m is less than 0.1° slope. There are also slight level differences in the north~south vane. All these can be corrected either by grinding away the cement or using lead or copper shims once the beam has been fashioned to fit.