How does one effect participation in connection with Shabbat limits? One sets down a jar and says, “Behold this is for all the inhabitants of my town, for anyone who may desire to go to a house of mourning or to a house of feasting”. Any one who accepted [the eruv] while it was still day is permitted [to enjoy its benefits] but if one did it after dusk he is forbidden, since they do not set up an eruv after dusk.

What is the minimum measure [for Shabbat border eruvin]?Food for two meals for each person, for weekdays and not for Shabbat, the words of Rabbi Meir. Rabbi Judah says: for Shabbat and not for weekdays. And both intended to give a leniency. Rabbi Yohanan ben Beroka says: not less than a loaf that is purchased for a pondium when the price of wheat is four se’ah for a sela. Rabbi Shimon says: two thirds of a loaf, when three [loaves] are made from a kav [of wheat]. Half of this loaf is the size prescribed for a leprous house, and half of its half is the size that disqualifies one’s body [from eating terumah].

If the tenants of a courtyard and the tenants of its gallery forgot and did not participate [together] in the eruv, anything that is higher than ten handbreadths belongs to the [residents of the] gallery, and anything lower belongs to the [residents of the] courtyard. The rim around a cistern, or a rock, if they are ten handbreadths high they belong to the gallery but if lower than they belong to the courtyard. To what does this apply? To one that is adjacent to the gallery, but one that is distanced from it, even if ten handbreadths high, belongs to the courtyard. And what is regarded as adjacent? One that is not further than four handbreadths.

If one put his eruv in a gate-house, a portico or a gallery it is not a valid eruv; And one who dwells in it does not prohibit [others from carrying if he doesn’t participate in the eruv]. [If one put his eruv] in a straw-shed, a cattle-shed, a wood-shed or storehouse it is a valid eruv; And one who dwells in it prohibits [others from carrying if he doesn’t participate in the eruv]. Rabbi Judah says: if the householder has there any ownership the resident does not prohibit.

One who leaves his house and goes to spend Shabbat in another town, whether he was a Gentile or an Israelite, he prohibits [the other residents from using the eruv], the words of Rabbi Meir. Rabbi Judah says: he does not prohibit. Rabbi Yose says: a Gentile prohibits but an Israelite does not prohibit because it is not usual for an Israelite to return on Shabbat. Rabbi Shimon says: even if he left his house and went to spend Shabbat with his daughter in the same town he does not prohibit, since he turned his attention away.

A cistern between two courtyards they do not fill up from it on Shabbat, unless they made for it a partition ten handbreadths high, whether above, below or from its rim. Rabban Shimon ben Gamaliel says: Bet Shammai say: below, And Bet Hillel say: above. Rabbi Judah said: the partition could not be more effective than the wall between the two courtyards.

A water channel that passes through a courtyard they do not draw water from there on Shabbat unless they made for it a partition ten handbreadths high at its entrance and exit. Rabbi Judah says: the wall above it may be regarded as a partition. Rabbi Judah said: it happened with the water-channel of Avel that they would draw water was from it on Shabbat on the authority of the elders. They said to him: because it was not of the prescribed size.

A balcony that was situated above the water, they do not draw water from there on Shabbat, unless they made for it a partition ten handbreadths high either above or below [the water]. So also two balconies, one on top of the other. If they made [a partition] for the upper one but not for the lower one, they are both prohibited until they make an eruv.

Rabbi Eliezer ben Yaakov says: a sewage drain which is covered over four cubits in the public domain, it is permitted to pour water into it on Shabbat. But the Sages say: even where a roof or a courtyard was a hundred cubits in area, he may not pour water over the mouth of the drain, but he may pour upon the roof, and the water will flow into the drain. The courtyard and the portico combined to make up the four cubits.

So too in the case of two two-storied buildings this one opposite that one: if some of the tenants made a trough and others did not, those who made the trough are permitted to pour down their water, but those who did not make any trough are forbidden.