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Eruvin 89

ERUVIN 88 & 89 have been dedicated by Mrs. G. Turkel (Rabbi Kornfeld's grandmother) to the memory of her husband, Yisrael Shimon (Isi) ha'Levi Turkel, who passed away on 10 Av 5780.


QUESTION: The Chachamim in the Mishnah maintain that the roofs of different residences are considered separate Reshuyos (in contrast to the opinion of Rebbi Meir, who maintains that the roofs are all considered one domain). Rav and Shmuel argue whether the Chachamim permit carrying in each roof alone. Shmuel says that it is permitted to carry throughout each roof, since we view the Mechitzos that are below the roofs, which separate the houses from one another, as rising up above the roof to separate each roof from the next (and thus each roof is surrounded by Mechitzos). Rav argues and maintains that it is permitted to carry only four Amos on the roof, because we do not view Mechitzos as rising above the roofs and, consequently, each roof opens into an area in which the residents of this roof are forbidden to carry ("Parutz b'Milu'o l'Makom ha'Asur Lo").

Why are Rav and Shmuel arguing about what the Chachamim hold? Both Rav and Shmuel rule like Rebbi Shimon (91a), who says that all roofs are considered one domain! If so, one may certainly carry more than four Amos on any of the roofs, and even from one roof to the next.


(a) TOSFOS (DH Rav Amar) says that if one wants to move utensils that were located *in the house* when Shabbos started and that are now located on the roof, even Rebbi Shimon agrees that it is forbidden to move the utensils to another person's roof. That is where the argument between Rav and Shmuel is pertinent. According to Shmuel, Rebbi Shimon would permit such utensils to be moved throughout the roof of the house from which they were taken, since the roof is considered surrounded by Mechitzos. According to Rav, the utensils may not be carried more than four Amos on the roof.

(b) Alternatively, one may not carry in an area which is larger than a Beis Se'asayim and which was not Hukaf l'Dirah. Hence, if the total area of the adjacent roofs is greater than a Beis Se'asayim, the argument between Rav and Shmuel would be pertinent even according to Rebbi Shimon. According to Shmuel, one may carry on the roofs because they are considered to be surrounded by Mechitzos, none of the roofs are larger than Beis Se'asayim of its own. According to Rav, the roofs have no Mechitzos separating them from each other, and thus they constitute an area of greater than a Beis Se'asayim which is not Hukaf l'Dirah. Therefore, one may not carry more than four Amos on the roofs.


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