When an alleyway is breached its full width into a courtyard, and the courtyard is also breached on the other side toward the public domain, what are the rules for the alleyway and courtyard — and how does whether they made a joint eruv affect this?
Synopsis
This complex case involves an alleyway opened fully into a courtyard that itself opens to the public domain. The courtyard is generally permitted (up to 10 amot). The alleyway's permissibility depends on: (1) whether they made a joint eruv; (2) whether the breaches face each other; (3) whether the courtyard belongs to one or many people; and (4) whether the alleyway walls extend into the courtyard.
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