Eruvin 25b

עירובין כ״ה ע״ב

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Topic

Walls that fall or are missing: a slanted roof, a קרפף breached into a חצר, and enclosing large orchards

Overview

This amud opens mid-discussion. If the covered part of the קרפף had a flat roof like an אכסדרה, everyone would agree that פי תקרה יורד וסותם, so the case must be a slanted roof shaped like a hammock. Next, רבי זירא says a קרפף fully breached into a חצר is forbidden, because the added space pushes it over בית סאתיים. רב יוסף objects that the חצר was already open for carrying. אביי answers that even according to רבי שמעון, the space where the walls stood is new space. רב חסדא's ruling, that the חצר stays permitted and only the קרפף is forbidden, is explained the same way: only a קרפף has a size limit. Then come two real-life cases. When a mansion's outer wall fell, רב פפי ruled that its inner walls cannot enclose the orchard, because they were built for the inside. Finally, רב הונא בר חיננא builds reed fences so the ריש גלותא can eat in his orchard pavilion on שבת, and the amud ends as רבא goes to react, which continues on the next amud.

Opening lines

The steps (12)

1. RejectionA flat roof would count as closed; the case is a slanted roof
2. Statementרבי זירא agrees a fully breached קרפף is forbidden
3. Challengeרב יוסף objects: how can permitted space make it forbidden?
4. Resolutionאביי: the space where the walls stood adds new area
5. Proofרב חסדא's ruling supports the fallen-wall-space idea
6. QuestionWhy does the courtyard stay permitted?
7. RejectionThe wall-remnants reason doesn't always work
8. ResponseExtra wall-space only hurts the karpef
9. StatementThe orchard next to the mansion
10. Rejectionרב פפי rejects relying on the mansion's inner wall
11. QuestionThe ריש גלותא asks for a way to eat in his orchard pavilion
12. Responseרב הונא בר חיננא builds a reed fence, and רבא arrives