POINT BY POINT SUMMARY
by Rabbi Ephraim Becker
Kollel Iyun Hadaf, Yerushalayim
Rosh Kollel: Rabbi Mordecai Kornfeld
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Previous dafSukah 4
1) PISKEI HALACHAH FROM R. ASHI REGARDING AN OVERLY TALL SUKAH
(a) Items which would not normally be left out in the Sukah for
seven days are not considered Batel to the Sukah and do not
reduce its height (e.g. bedding), while items which are
subject to Bitul (e.g. straw) will reduce the height (and
certainly items which are normally assumed to be Batel e.g.
2) PISKEI HALACHAH ASHI REGARDING AN OVERLY SHORT SUKAH
1. Question: What about straw which he does not intend to
remove but he did not state his Bitul, or dirt which he
placed without any special intent?
(b) If leaves droop down into the 20 Amos range, we check to see
if those leaves would be sufficient to constitute S'chach on
their own and they then validate the Sukah.
2. Answer: It is a Machlokes R. Yosi and Rabanan (taught
regarding filling the open Tefach above a body to cause
Tumah to rise above the enclosure).
i. Rabanan teach in the Mishnah that (only [Beraisa])
if one is Mevatel the straw or dirt it is Batel.
ii. R. Yosi qualifies the Mishnah:
(1) Straw which he does not intend to remove is
deemed like dirt placed Stam and is Batel.
(2) Also, if he intended to remove the dirt it is
viewed like straw Stam and it not Batel.
1. Regarding a Sukah whose leaves drop into the 10 Tefach
(minimum) range there is a Machlokes.
(c) A structure in part of the Sukah may be used to reduce the
entire Sukah to (be considered) within 20 Amos.
2. (Abaye) We check for density (as above).
3. (Rava) It is not valid even without density, since
these drooping leaves make the Sukah a miserable place.
1. This is providing that the structure has three walls.
(d) If the structure is in the middle of the Sukah we check to
see that there are less than four Amos to the three walls.
2. This can be accomplished by building the structure
along the entire far wall of the Sukah.
3. Alternately, if the structure is built along one of the
side walls (in a Sukah with three walls) and the
distance to the opposite wall is less than four Amos,
with Dofen Akumah allowing us to use that wall.
i. Question: What is the news this alternate method?
ii. Answer: To teach the rule of Dofen Akumah.
iii. Question: But that is a Mishnah (17b permitting a
Sukah-skylight if the walls are up to four Amos
away from the edge of the skylight).
iv. Answer: We might have thought to apply that
Mishnah since the walls there are Kosher, but
distant; whereas our wall is invalid (it is more
than 20 Amos tall).
1. Question: What is the news here?
2. Answer: Dofen Akumah.
3. Question: But we were just taught that Din!?
4. Answer: We might not have known to apply Dofen Akumah
in multiple directions.
(a) It is permitted to dig up the floor in the middle of the
Sukah to raise its height to 10 Tefachim, providing the
cavity is less than three Tefachim (Lavud) from the walls.
(b) Question: Why don't we allow four Amos (Dofen Akumah)?
3) GUD ASIK BY A SUKAH
(c) Answer: There we are taking advantage of existing wall by
bending it closer (Dofen Akumah) while here we are *making*
the wall by extending it to 10 Tefachim (requiring Lavud).
(a) If one builds a (7x7 Tefach) platform 10 Tefachim tall in a
Sukah taller than 20 Amos (away from the walls, such that
Dofen Akumah is not relevant):
1. (Abaye) We should apply Gud Asik to imagine the walls
of this platform as extending upward to the S'chach.
2. (Rava) A Sukah cannot be built with imaginary walls.
(a) If one erects four poles, placing a crossbeam from one to
the other and places S'chach above them it is a Machlokes
whether it is Kosher (R. Yakov) or Pasul (Chachamim).
1. (R. Huna) The Machlokes is when the poles are erected
on the edge of a roof, where they argue over whether
Gud Asik provides the walls for the Sukah (but all
would invalidate such a structure in the middle of the
(b) (Beraisa) If the poles of the structure are round, R. Yakov
allows us to view them as though they were squared off and,
if there would be a Tefach facing each direction, we apply
the Diyumad principle (a Mechitzah made of a Tefach on each
2. (R. Nachman) Their Machlokes is when the structure is
erected in the middle of the roof, since (according to
R. Yakov) the poles provide a one-Tefach Mechitzah on
each side [called Diyumdin] (while the Rabanan only
allow a one-Tefach Mechitzah as the third Mechitzah of
3. Question: Does R. Nachman mean that all would agree
that on the edge of the roof would be Kosher, or did he
mean that there is a Machlokes here, as well (if the
Chachamim require visible Mechitzos).
4. Answer: Teiku.
5. Question (on R. Huna): The Beraisa teaches that such a
structure built on the ground (which should be the same
as in the middle of the roof and yet) has the same
Machlokes (meaning that R. Yakov permits without Gud
Asik, relying on the poles as Mechitzos)!?
6. Answer: This indeed refutes R. Huna.
7. Question: Perhaps there is a second refutation of R.
i. We may infer from the cited Beraisa (that the
Machlokes is when the structure is on the ground,
equivalent to in the middle of the roof) that the
edge of the roof is unanimously deemed Kesheirah.
8. Answer: It means that they argue in the middle of the
roof in addition to their argument on the edge (and
they discussed the case of the middle of the roof to
indicate the degree to which R. Yakov permits employing
the Diyumdin of the poles).
ii. This would refute the second point of R. Huna, as
(c) The Chachamim require two proper Mechitzos while the third
may be a Tefach.