“Can the eruv fences, walls, and wires be checked religiously every week, yet the eruv is invalid?”
Question #2: Shabbos in a warehouse
“May one carry in a warehouse on Shabbos?”
Question #3: Do people live in the zoo?
What do the previous two questions have to do with the title of this article?
Answer: Invalidating an eruv from inside
With the direction of his rav, Yankel has joined the committee of makers and shakers working on building an eruv in his hometown. He now knows that the area in which he currently lives has the halachic status of a karmelis, an Aramaic word meaning an area in which one may not carry, but which can be enclosed to permit carrying. Creating the enclosure in a halachically approved way is what one does when building an eruv.
One of the benefits of his new project is that Yankel learns much about the laws of eruv. Among the laws he discovers is an entire area of halachah with which he was not familiar – that enclosing an area does not always permit carrying. Often, there is an area within the eruv that precludes carrying there. These areas are often called karpif, although Yankel discovers that this term is also not really accurate. As a result of his curiosity, he studies the relevant source material in the second chapter of Mesechta Eruvin, a topic that he, like most people, had never studied during his years in yeshivah.
What is a karpif?
Although min hatorah one may carry within any enclosed area, Chazal permitted carrying in a large area only when the enclosing of the area serves a residential purpose, which is called mukaf ledirah. If the enclosure was not mukaf ledirah, the area inside is also considered a karmelis in which one may not carry.
Technically, the word karpif means an enclosure outside the city in which one stores felled wood (Rashi, Eruvin 18a). However, the term is generally used to mean an enclosed area that is not mukaf ledirah.
Yankel learned that if an enclosure does not serve a residential purpose, one may carry within it only when it encloses an area that is no larger than the size of the courtyard of the mishkan, which was 50 amos (cubits) wide and 100 amos long, the size of 5000 square amos (Mishnah Eruvin 23a). An area this size is called a beis sasayim, an old farmers’ term based on how much seed they would plant there, and equals approximately 1000* square meters or 10,000-11,000 square feet. For the balance of this article, I will refer to an area larger than a beis sasayim, that is, one that contains more than 5000 square amos, as a large area, and any area smaller than this as a small area.
There is another factor that must be met to permit carrying in a small area that is not enclosed for residential use – its length may not exceed twice its width by more than one amoh (Mishnah, Eruvin 23a).
Why is a small karpif permitted?
Why may one carry in an area that is not mukaf ledirah when it is 5000 square amos or smaller? Was this size chosen arbitrarily?
Chazal permitted carrying in a small area, even when it is not mukaf ledirah, for the following reason: Since no one is permitted to live in the courtyard of the mishkan, the curtains that surround it do not make it mukaf ledirah. This would mean that carrying within the mishkan would be under the heading of a rabbinic prohibition. Yet this carrying was necessary on Shabbos for the regular functioning of the mishkan. Rather than treat the mishkan as an exception to the halachah, Chazal permitted carrying in any area that is this small, even when it is not mukaf ledirah (see Graz, Orach Chayim 358:3).
What is mukaf ledirah?
The definition of what qualifies as mukaf ledirah and what does not is, at times, not obvious. The Gemara (Eruvin 22a) itself states that there are instances when an enclosed area is roofed and resembles a building, yet it is considered not mukaf ledirah, and there are places that are open-air and yet have the status of mukaf ledirah. The Mishnah (Eruvin 18a) mentions four cases that qualify as mukaf ledirah, even though (according to Rashi) there is no roof over them. They are:
(1) Dir — a corralled area that one intends to plant eventually. At the moment, it is fallow, and one is grazing one’s livestock there, so that they naturally fertilize the field.
(2) Sohar, which is, according to Rashi, an area where the townspeople graze their animals, and, according to the Rambam, a prison.
(3) Muktzah — a backyard area.
(4) Chatzeir, a front yard.
The Ritva (Eruvin 22a) explains that the list is progressively more obvious; meaning that the first case, that of dir, is the least obvious “residential” area. Indeed, much halachic literature is devoted to explaining why an area enclosed for animals is considered residential, when, as we will soon see, areas enclosed for trees or vegetation are not.
Our next objective is to define what is considered a non-residential enclosure, eino mukaf ledirah, in which one may not carry unless it is small, as defined above. The Mishnah and the Gemara teach that several different types of enclosed areas are not mukafim ledirah. As I mentioned above, one of these is a karpif, an enclosure outside the city in which one stores felled wood (Rashi, Eruvin 18a). Similarly, a fenced-in orchard (Rambam, Hilchos Shabbos 16:1, based on Eruvin 25b), a vegetable patch or a grain field (Mishnah Eruvin 18a; Eruvin 23b) are not mukaf ledirah, even when they contain huts, called burgenin, for the watchmen (Eruvin 22a). In all of these instances, the fence built around the perimeter does not serve a residential need. Even the watchman’s hut is there not to serve as a residence, but to allow the watchman to remain nearby (Rashi, Eruvin 15a). (We should note that some authorities [Tosafos Shabbos, 358:1; Pri Megadim, Eishel Avraham 358:1] contend that if the watchman sleeps overnight in the hut, it is considered a residence. In their opinion, a burgenin is considered not mukaf ledirah because one uses it only in the daytime.)
We need to understand exactly why certain uses are considered residential, and others are not. However, prior to explaining these ideas, we need to clarify another aspect of this discussion.
What is the halachah if an enclosure comprises both an area considered residential and an area that is not? For example, Yankel’s neighbor, Shmerel, has a large fenced-in backyard, which his family uses predominantly for barbecues and other recreation. It sounds as if this area should be treated as mukaf ledirah, even if it is larger than 5000 square amos. Indeed, its proximity to the house and its use would make this backyard mukaf ledirah.
However, this yard also includes a section planted with various spices and vegetables. As we learned above, a planted area is not mukaf ledirah. Do we consider the entire yard mukaf ledirah or not? May Shmerel’s family carry in the backyard? In the course of Yankel’s studying the laws of Eruvin, he discovered that carrying in his neighbor’s fenced-in yard might be prohibited!
A breached eruv — Nifratz bemilu’oh
To answer these questions, we need to explain a principle, called nifratz bemilu’oh, literally, breached in its entirety. Whenever an area in which one would otherwise be permitted to carry is open to an area where carrying is forbidden, the halachic result is that one may not carry in the otherwise permitted area (see Eruvin 25b). Thus, if it is prohibited to carry in the planted area, and the recreational part of Shmerel’s yard is nifratz bemilu’oh to the planted area, one cannot carry in any part of Shmerel’s yard (Shulchan Aruch, Orach Chayim 358:10). As we will soon see, this law has major ramifications for city eruvin also.
What is called “breached?”
Our next question, germane both to Shmerel’s yard and to our city eruv, is: How big a breach prohibits carrying?
There are two ways that a breach forbids carrying. One is when it is greater than ten amos, approximately seventeen feet or five meters. The other way is when the breach is smaller than ten amos but it comprises an entire side of the otherwise-permitted mukaf ledirah area. For example, if an otherwise-permitted rectangularly-shaped area is mukaf ledirah on three of its sides, but the remaining unwalled side opens to an area in which carrying is forbidden, even if the unwalled side is less than 10 amos wide one may not carry in the mukaf ledirah area.
In terms of Shmerel’s yard, this means that if the recreational part is not isolated from the garden, and the garden is large enough to prohibit carrying, the entire yard is prohibited. The same concept is true in a city eruv, as we will soon see.
How large a garden?
Before we can issue a ruling regarding Shmerel’s garden, we need one more piece of information. How large a garden will prohibit carrying?
The Gemara (Eruvin 23b-24a) states that if a planted area is larger than 5000 square amos, one may not carry in any part of the backyard. Even when the planted area is smaller than 5000 square amos, if the planted part is larger than the rest of the yard and the entire yard is larger than 5000 square amos, one may not carry in any part of it.
Healing a breach
Yankel and Shmerel measure the vegetable garden and the yard and discover that, lo and behold, one may not carry in Shmerel’s yard. Is there any way to fix the above problem to permit carrying within the recreational part of the yard?
Yes, there are at least two ways that one can do this. The first is to separate the recreational area from the planted area, and the second is to subdivide the planted area until it is small enough not to create a halachic issue. There are several ways of implementing either of these methods, but discussing them is beyond the scope of this article.
A flower garden
What is the halachah if Shmerel’s garden consists of a flower garden, rather than a vegetable patch? Does his flower garden invalidate the area for carrying, just as the vegetable garden did?
The halachic issue here is the following: People do not live in vegetable patches, but they do enjoy looking and smelling pretty and fragrant flowers. Is this a sufficient reason to consider a flower garden mukaf ledirah?
This matter is a subject of dispute, with different authorities on, shall we say, different sides of the fence. Although most authorities rule that a flower garden does not present a problem (see also Meiri, Eruvin 24a), the Divrei Chayim of Sanz (Shu’t Divrei Chayim, Orach Chayim 2:28) and the Sha’ul Umeishiv (Shu’t 3:131) were among the authorities who ruled that a flower garden will prohibit an eruv. Someone with a similar shaylah should refer it to his own rav or posek.
As I mentioned above, the Gemara rules that a large, planted area for vegetables or grains will invalidate the eruv. Several halachic authorities say that a grass cover does not invalidate an eruv, since people relax by sitting or lying on the grass. However, can this logic apply when someone does not permit anyone to walk across their expensively tended lawn? This phenomenon, not uncommon in a modern suburban setting, implies that the contemporary lawn of this nature may not be considered mukaf ledirah and can therefore create a problem, if it is larger than a beis sasayim. I leave this question for the eruv movers and shakers to discuss with their posek.
Another halachic factor is that mukaf ledirah requires that the enclosure must have been constructed initially for residential use. This is called pasach u’le’besof hukaf, literally, he opened the entrance first and then afterwards enclosed the area (Eruvin 24a). However, if the area was enclosed when it did not yet have a residential use, providing it with a residential purpose later will not render the area one in which carrying is permitted.
For example, if Shmerel had originally decided to fence in his large yard because he wanted to plant vegetables, and only later decided to use it for domestic purposes, one may not carry in the yard, since its enclosure was originally not for domestic use. (There are ways to rectify such a situation, but this is a topic that we need to leave for a different time.)
We have yet to discuss another related question: What is the halachah if an area was originally mukaf ledirah, and then someone planted within the mukaf ledirah area? Does this now render the area a karmelis and prohibit carrying? As an example, let us imagine the following scenario: When Shmerel built the fence around his yard, his intention was for residential purposes, and it therefore had a status of mukaf ledirah. At this point, one could carry in the yard. Later, Shmerel decided to plant a large vegetable garden in the yard. Do we say that the yard remains permitted?
The halachah is that planting grain or vegetables invalidates the enclosure, and it is prohibited to carry in his yard.
However, there is an interesting halachah here. Not all planting invalidates the external walls. For example, the Gemara (Eruvin 23b) states explicitly that if one plants a large area of trees, one may continue carrying in the area. This ruling is very interesting, especially in light of the fact that a fence surrounding an orchard is not considered mukaf ledirah.
Trees versus veggies
What is the different between trees, which do not invalidate the eruv, and grain and vegetables, which do?
Rashi (Eruvin 23b) explains that people do not live in a vegetable patch; however, people will walk through an orchard to enjoy the shade. Thus, the planting of trees does not remove the designation of mukaf ledirah from the area.
As I noted above, the latter halachah applies only when one planted trees in an area that was already mukaf ledirah. In other words, there is a difference between enclosing the area, which requires that it initially is mukaf ledirah, and changing its status once it was mukaf ledirah. Enclosing an orchard is not considered mukaf ledirah.
We will continue this article next week…
* The measurements used in this article are meant only for rough calculation.