(Mishnah): If Bnei Chatzer forgot to be Me'arev [together] with Bnei Mirpeses (a ladder from the Chatzer leads to a balcony leading to their apartments; each group was Me'arev by itself):

Anything (e.g. a mound at least four Tefachim wide and) 10 Tefachim tall is [permitted] to the Bnei Mirpeses (to transfer between it and their apartments); anything less than 10 is to the Bnei Chatzer.

If a rock or Chulyah of a pit is 10 Tefachim tall, it is to the Bnei Mirpeses. If it is less, it is to the Bnei Chatzer.

This is if these are near the Mirpeses. If they are far away, even if they are 10 tall, they are to the Bnei Chatzer;

What is "near''? Anything not distanced four Tefachim [is near].

(Gemara) Question: (Why is a big mound to the Bnei Mirpeses?) It is of the people below (Bnei Chatzer)!

Answer (R. Yudan): This teaches that if Reuven's ruin is in Shimon's Chatzer, and Shimon uses it, it is as if it is his.

The following is obvious. If [a Reshus is between two Chatzeros that were not Me'arev, and] this one has an opening to it and] this one has an opening to it, both are forbidden. We learn this from the case of a house between two Chatzeros (towards the end of Halachah 7:5 above, according to KORBAN HA'EDAH's text).

If this [Chatzer use the Reshus] via throwing, and this [Chatzer can use it] via lowering, Shmuel permits it to the one that lowers, for this is [more] normal. The one that throws is forbidden, for it is not [as] normal;

Rav says, both of them are forbidden.

Question: Our Mishnah argues with Rav! Anything 10 Tefachim tall is to the Mirpeses. Less than this is to the Chatzer. Does our Mishnah not discuss when this (the Chatzer uses it) via throwing, and this (the Mirpeses uses it) via lowering?!

Answer: (No.) It is within three Tefachim of the upper ones (Mirpeses, so it is convenient for them) and more than 10 Tefachim above the lower (Chatzer, so it is inconvenient for them. We explained this like PNEI MOSHE.)

When do Rav and Shmuel argue? When it is equal (the top must lower 10 Tefachim, and the bottom must throw 10 Tefachim).

If there was a ruin there - R. Yochanan says, we give (permit) the ruin to its owner.

Question: [Perhaps] he said so only when one can use the ruin through its opening. If one use the ruin through a window, [what is the law?]

Answer (R. Acha citing R. Yochanan): Even so, we give (permit) the ruin to its owner.

(R. Elazar citing R. Hoshayah): If there were three [ruins in a row between two Chatzeros] - this one uses the ruin [next to it] through its opening, and this one uses the ruin [next to it] through its opening, and the middle one is forbidden [to both].

When is this? It is when the middle is of both of them, but if it belongs to someone in the market (not from either Chatzer), this one uses one (the ruin next to it) and this one uses one [next to it] and the second [in the middle. Avodas ha'Kodesh (Beis Nesivos 3:288) - i.e. if the latter regularly uses it, it gets it. If both normally use it, why should we give it to one over the other?!]

(R. Yochanan): The Omed (Chulyas ha'Bor) and the cavity (pit) join [to a width of four to make Reshus ha'Yachid]. This is if the Omed exceeds the cavity.

Question (R. Ze'ira): Do we require that the Omed from this side [exceeds the cavity] and the Omed from this side [exceeds? Or, does it suffice if the total Omed on both sides exceeds the cavity?]

(R. Yosah): It was clear to R. Ze'ira that what is standing on one side does not join [with the other side to exceed the cavity]. It was clear to him that what is standing on one side must exceed (it is not enough to equal the cavity). He asked only if even the other side [must exceed the cavity by itself].

(R. Yirmeyah citing R. Shmuel bar Rav Yitzchak): Our Mishnah discusses [when the width of the mound is] between three and four.

If it is less than three, even if it is more than 10 it is permitted. If it is [at least] four, even less than 10 is forbidden. Rather, the case is, it is between three and four.

This is when there is no roof. However, if there is a roof, even if it is very high, it is of the lower people.

(Rebbi): This is when there is no hole [in the roof - PNEI MOSHE]. However, if there is a hole [the upper people] use it through the hole.