Close your eyes, breathe in deeply, now exhale slowly… That was easy, wasn’t it? Not for everyone…
One of the thirty-nine prohibited melachot on Shabbat is carrying an object from a private domain, reshut hayachid, to a public domain, reshut harabim, or carrying an object a distance of four amot, six to eight feet, in a reshut harabim. The Torah does permit, however, carrying within the reshut hayachid itself. The definition of a reshut hayachid and a reshut harabim is crucial, therefore, to the laws of carrying on Shabbat.
A reshut hayachid is an area of at least four by four tefachim (approximately 15 inches) square, enclosed by walls or other partitions that are at least ten tefachim, approximately three feet high. The usual form of a reshut hayachid is a house or a garden, but the term also includes a depression or an elevation of not less than the above dimensions in a public space, such as a ditch or a mound. A reshut hayachid may extend for miles in each direction. The partitions of a reshut hayachid can be natural, such as the canals surrounding the Hague in Holland, or even, as has been suggested, the cliffs surrounding all of the British Isle. Private ownership is not a requirement for a reshut hayachid and even a ditch of the described dimensions in a reshut harabim can constitute a reshut hayachid.
One of the more controversial aspects of the laws of eruvin – which has direct bearing upon how and if the construction of an eruv, as we know it, is possible – lies in the definition of a reshut harabim. Although there is a wide spectrum of opinions among the Rishonim, the generally accepted definition is as follows: A reshut harabim is an unroofed, public area or highway, open at both ends – mefulash – being at least sixteen amot (24 to 32 feet) wide, through which at least 600,000 people (equivalent to the counted male adult population of the Jewish encampment in the desert) might pass in one day.
Then too there is an area that qualifies neither as a reshut hayachid nor as a reshut harabim because it lacks one of the necessary conditions. Such a betwixt and between area is known as a karmelit.
In a typical city most streets are not mefulash, in that they do not cut through the entire city in a straight line from one end of the city to the other. Rather, they wind and curve so that they are always surrounded by walls and buildings on all three sides. Such streets that are portioned off on all three sides are considered by the Torah to be a reshut hayachid, in which carrying would be biblically permitted. The rabbis, however, fearing that people would not be able to distinguish between such streets and other streets that do qualify as a reshut harabim classify those streets as karmelit. Accordingly, they prohibit carrying in streets unless a halachically valid enclosure is positioned at the open end and an eruv ceremony is performed. The purpose of the eruv is to enclose the area in question, on all sides, so that it becomes a reshut hayachid, recognized as such by the rabbis.
If the area in question qualifies as a reshut harabim, it can only be converted into a reshut hayachid by installing real doors or gates at its perimeter, which, like the gates of Jerusalem of old, must be capable of being closed at night. If, however, the area in question is not a reshut harabim, but only a karmelit, then it may be converted into a reshut hayachid by simply constructing a form of a symbolic doorway known as a tzurat hapetach, which usually takes the form of two poles with a wire across the top, or some similar construction.
The halachic license to carry in a street enclosed by a symbolic doorway rather than by real doors that can be closed at night is based on the theory that most streets, as we know them today, are not in the category of reshuyot harabim. But if there is doubt whether a particular street is of such dimensions that it might qualify as a reshut harabim, then a potential biblical violation of carrying is involved and a tzurat hapetach may not be acceptable. Most modern tzurat hapetach eruvin utilize preexisting structures such as fences, walls, embankments, sides of buildings and long lines of overhead cables. Most gaps of up to ten amot do not disqualify an eruv, because they are considered entrances to the enclosure. Gaps in excess of ten amot do disqualify the eruv, but can be fixed by bridging them with a tzurat hapetach, such as overhead cables or strategically placed wire.
Whether the entire island of Manhattan can be enclosed by an eruv remains a controversial question. The issues are whether the eighteen bridges around the island that can transport in excess of 600,000 people to and fro are considered directly connected to the highways running through Manhattan, so as to render them mefulash and thereby make the island a reshut harabim. If they indeed do, then traffic transporting in excess of 600,000 people in one day through mefulash highways means the island cannot be enclosed by the unobtrusive device of tzurat hapetach, and the impractical device of gates capable of being closed at night would be required.
Many poskim, starting in 1949 with the Amshinover Rebbe, endorsed the enclosure of Manhattan by a tzurat hapetach eruv. Rabbi Moshe Feinstein, in a 1951 teshuvah concerning Manhattan addressed to Rabbi Tzvi Hirsch Eisenstadt and in a 1981 teshuvah concerning Brooklyn, questions the halachic basis of such an eruv. Rav Feinstein’s main concern is that the access to and from Manhattan of numbers of people far in access of 600,000, through bridges that connect to the highways, renders Manhattan a reshut harabim. Some poskim of great stature disagree, however.
About the Author: Raphael Grunfeld’s book, “Ner Eyal on Seder Moed” (distributed by Mesorah) is available at OU.org and your local Jewish bookstore. His new book, “Ner Eyal on Seder Nashim & Nezikin,” will be available shortly.
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