What eruv structures are required for a pass-through alleyway (mavo mefulash) open at both ends to a public domain, or with one end to a public domain and the other to a karmelit?

ShabbatEruvin

Synopsis

A pass-through alleyway open to reshut ha-rabim (or karmelit) on both ends requires a tzurat ha-petach on one side and a lechi or korah on the other. The logic is that the tzurat ha-petach effectively closes one side, leaving only three open sides, so the fourth requires only a lechi or korah.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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