A beam of concrete around 200mm thick is typically poured on the ground around the edge of the shell, locking it into place. Something like this:

We covered cutting and bending in the first-part of this two-part post. Now it’s time to place the bent, cut, steel with the help of chairs and ties.

534 meters of bar plus mesh to be precise. As discussed during the detailed design, the retaining walls and wall footings contain a lot of steel. Specifically, N12 and N16 bars. This type of steel reinforcement inside concrete is typically referred to as rebar, or reo, depending on which part of the world you’re in, and adds tensile strength to the concrete.