(R. Ba bar Mamal): One may not carry underneath town Tutrapliyos (beams that protrude from large buildings that stand upon the four large columns at the entrance to the building) as they are the end of the roofing, which cannot be effective as Pe'ah.

(R. Pinchas): A story came before R. Yirmiyah, where four beams were resting on four columns, and R. Pinchas permitted them to carry underneath them because of Pe'ah. (Note: This entry follows the understanding of Rav Chaim Kanievski.)

Question #1 (R. Bun and Rabbanan to R. Zeira): Can Pe'ah serve as a wall of a Sukah?

Answer (R. Zeira): Yes.

Question #2: Can the end of the Schach (that is resting on four vertical beams) serve as a wall for the Sukah (in the way of the reed cord stretched between canes)?

Answer: No.

Question: What's the difference?

Answer: One is built for this purpose (Pe'ah), one is not (Schach).

(R. Abahu): All of these discussions are theoretical, but a Rav may not instruct a person to rely on Pe'ah as a partition on Shabbos. If for Sukah, which is relatively lenient (it is a positive Mitzvah) we do not rely on it; for Shabbos which is stringent (transgressing it is punishable with Kares), we certainly do not rely on it.

Question (R. Bun bar Chiya to R. Zeira): Who is the Tana that holds that Pe'ah acts as a partition for Kilayim? Is it not R. Yochanan ben Nuri (who said earlier that Pe'ah also helps for a partition on Shabbos - so why conclude that it does not help for Shabbos)?!

Answer (R. Zeira): Yes, but R. Yochanan ben Nuri's view is a minority opinion and is not the Halacha.

The rule is - for the laws of Kilayim, a breach of less than three is considered to be closed up;

Between three and four (not inclusive), if the solid is the majority it is permitted to plant; if the breach is the majority, it is prohibited;

Between four and ten (inclusive), if the solid is the majority it is permitted to plant; if the breach is the majority, opposite the solid is permitted; opposite the breach is prohibited.

If it is more than ten, even if the solid is the majority, opposite the solid it is permitted to plant, opposite the breach is prohibited.

For the laws of Shabbos, a breach of less than three is considered to be closed up.

Between three and four and between four and ten, if the majority is solid, it is permitted (for it to serve as a partition); if the breach is the majority, it is prohibited.

More than ten, even if there is a majority of solid, it is prohibited.

(R. Chananya/ R. Yehuda bar Pazi quoting R. Yochanan): Remove the case of between three and four because once there is a breach of three, we cannot view it as closed up (Lavud).

Question (R. Mana): The Mishnah (in Maseches Eiruvin) teaches that one may make an enclosure using vertical canes. Are canes usually a Tefach wide?

Response (R. Chananya): You cannot question me from the case of canes, as the Mishnah is discussing a case when the canes are positioned close together (less than three apart) allowing us to use Lavud to view them as one unit.

(R. Yosi bei R. Bun quoting Rav): Nevertheless, whether the breaches are less than three or between three and four, since the solid is the majority, it is permitted.