When a sukkah has proper s'chach but the lower sukkah cannot accommodate the upper sukkah's furnishings or fewer than ten tefachim separate them, what is the minimum height the upper sukkah's s'chach must be?
Synopsis
When the lower sukkah is valid due to separation or furnishing limitations, the upper sukkah's s'chach cannot exceed twenty amot in height, as only the lower's proper s'chach then provides the sukkah.
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