Step 2: laying the steel

After the trenches were dug, each needed steel to be carefully laid within.

Two layers were needed. The first, 5cm from the bottom of the trench; the second at least 5cm from the top of where the concrete would be poured to. Plus all needed to be at least 5cm from the walls of the trench. The steel came in 6m lengths, by around 30-35cm, so the guys had to cut it to measure using an angle grinder. Where there were joins, the steel had to overlap by 60cm. And of course the columns needed to cover a wider area.

To position the steel, effectively in mid-air, they dangled it from wires tied to rods that were balanced across the top of the trench. In short - it was a really fiddly job, and pretty tedious when you consider they had to do it for 130m of trench!





Finally, the upright steel poles that would go in the middle of the columns needed to be put in and wired into place in the mesh. These were carefully measured to be 5m apart and there were two poles per column, each about 6 foot tall.