Here's Edgar tying two pieces of steel rebar together with a piece of wire. This horizontal steel reinforcement is laid on top of a row of blocks at every 60cm up the wall. All these kinds of details slow down work a bit but hopefully mean the house will be a lot stronger.
I don't know much or anything about earthquake resistance but I think the idea is that if the house moves, the whole house moves together and you don't end up with one wall moving one direction and another wall staying put and a big whole in the middle.
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