אורח חיים שע״בOrach Chayim 372

Se’if 1א׳

גַּגִּין, וַחֲצֵרוֹת, וְקַרְפִּיפוֹת, כֻּלָּן רְשׁוּת אַחַת הֵם לְכֵלִים שֶׁשָּׁבְתוּ בְּתוֹכָן, שֶׁמֻּתָּר לְטַלְטְלָם מִזֶּה לְזֶה אֲפִלּוּ הֵם שֶׁל בְּעָלִים הַרְבֵּה וְלֹא עֵרְבוּ יַחַד, מֻתָּר לְטַלְטֵל מֵחָצֵר לְחָצֵר אַחֶרֶת, אוֹ לַגַּג, אוֹ לְרֹאשׁ כֹּתֶל שֶׁבֵּינֵיהֶם, וּמִגַּג לְגַג אַחֵר הַסָמוּךְ לוֹ, אֲפִלּוּ גָּבוֹהַּ מִמֶּנּוּ הַרְבֵּה, וּמֵהַגַּג לְקַרְפָּף שֶׁאֵינוֹ יוֹתֵר מִסְאָתַיִם, אוֹ שֶׁהֻקַּף לְדִירָה אֲפִלּוּ הוּא יוֹתֵר מִסְאָתַיִם, אוֹ לְמָבוֹי שֶׁמְּתֻקָּן בְּלֶחִי אוֹ קוֹרָה, אֲפִלּוּ לֹא עֵרְבוּ בּוֹ, וְאַף עַל פִּי שֶׁעֵרְבוּ בְּנֵי חָצֵר לְעַצְמָן דִּשְׁכִיחֵי מָאנֵי דְּבָתִּים בֶּחָצֵר, מֻתָּר לְטַלְטֵל כֵּלִים שֶׁשָּׁבְתוּ בְּחָצֵר (זוֹ) לְחָצֵר אַחֶרֶת, וְלֹא חַיְישִׁינָן שֶׁמָּא יְטַלְטֵל גַּם כֵּלִים שֶׁשָּׁבְתוּ בַּבַּיִת לְחָצֵר אַחֶרֶת אוֹ לְגַג וְקַרְפָּף.

The laws of apartment partners regarding an Eruv. Containing 19 aragraphs: Roofs, courtyards, and enclosed yards are all considered one domain with respect to utensils that were in them when Shabbat began. It is therefore permitted to carry such items from one to another—even if they belong to different owners who did not join in an eruv. One may carry from one courtyard to another, to a roof, to the top of a wall between them, and from one roof to another adjacent roof—even if the other is much higher. One may also carry from a roof to a karpaf not larger than two se’ah, or one that was enclosed for dwelling even if larger, or to an alleyway (mavoy) that has been properly prepared with a side-post (lechi) or beam (korah), even if no eruv was made there. Even though the residents of a courtyard made an eruv among themselves—since household items are commonly found in the courtyard—it is nevertheless permitted to carry utensils that were in this courtyard at the onset of Shabbat to another courtyard, and we are not concerned lest one carry items that were in the house to another courtyard, roof, or karpaf.

Se’if 2ב׳

קַרְפָּף יָתֵר עַל סְאָתַיִם שֶׁלֹּא הֻקַּף לַדִּירָה, הָוֵי כַּרְמְלִית וְאָסוּר לְטַלְטֵל מִמֶּנּוּ לְקַרְפָּף אַחֵר לְהַכְנִיס וּלְהוֹצִיא מִזֶּה לְזֶה כִּי אִם שְׁתֵּי אַמּוֹת בָּזֶה וּשְׁתֵּי אַמּוֹת בָּזֶה.

A karpaf larger than two se’ah that was not enclosed for dwelling has the status of a karmelit, and it is forbidden to carry from it to another karpaf—bringing in or taking out—except for four cubits total (two cubits in each).

Se’if 3ג׳

שְׁתֵּי חֲצֵרוֹת שֶׁרוֹצוֹת לְעָרֵב יַחַד לְהַתִּיר אַף כֵּלִים שֶׁשָּׁבְתוּ בְּבָתִּים אֵין צְרִיכוֹת עֵרוּב אַחֵר, אֶלָּא הָעֵרוּב שֶׁעָשׂוּ כְּבָר יוֹלִיכֶנּוּ אֶחָד מִבְּנֵי הֶחָצֵר בִּשְׁבִיל כֻּלָּם וְיִתְּנֶנּוּ בְּאֶחָד מִבָּתֵּי חָצֵר שְׁנִיָּה. וְאִם יִרְצֶה יוֹלִיךְ שָׁם אֲפִלּוּ פַּת מִשֶּׁלּוֹ, וְכֻלָּם מֻתָּרִים. הַגָּה: וְהוּא שֶׁעֵרְבוּ בְּנֵי חֲצֵרוֹ עִמּוֹ תְּחִלָּה (תְּשׁוּבַת הָרֹא"שׁ סי"ו), אוֹ שֶׁאֵין צְרִיכִים לְעָרֵב כְּמוֹ שֶׁנִּתְבָּאֵר סִימָן שׁ"ע (בֵּית יוֹסֵף), וְהוּא שֶׁעֵרְבוּ בְּנֵי הֶחָצֵר הַשְּׁנִיָּה לְעַצְמָהּ. וְאֵין בְּנֵי חָצֵר הַשְּׁנִיָּה צְרִיכִים פַּת אַחֵר, אֶלָּא הָעֵרוּב שֶׁעָשׂוּ כְּבָר, מַתִּירָן.

Two courtyards that wish to make a joint eruv to permit even items that were in houses do not need a new eruv. Rather, the eruv they already made may be taken by one resident on behalf of all and placed in one of the houses of the second courtyard. If he wishes, he may even bring his own bread there, and then all are permitted. <smal>Rema: This applies provided the residents of his courtyard first joined with him (Responsa of the Rosh §16), or they are not required to make an eruv as explained in Siman 370 (Beit Yosef). And provided the residents of the second courtyard made their own eruv; they do not need additional bread, as their existing eruv suffices.