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  1. Cian

    Do my retaining walls need pillars

    Hey, I'm in the process of digging foundations for two retaining walls. 400mm deep x 450mm wide. I'm going to lay solid blocks on flat. 440x100x215. So the wall will be 215mm thick and 1.2metres high. One wall is 5metres long and the other 7metres. Do I need any extra pillars or piers for...
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