The building section is the best forum for this but I can tell you that basically any soil pipe going under a wall must have a lintel to carry the weight off the pipe. You use the word joint which doesn't make sense. So the answer is Yes.
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The building section is the best forum for this but I can tell you that basically any soil pipe going under a wall must have a lintel to carry the weight off the pipe. You use the word joint which doesn't make sense. So the answer is Yes.