POINT BY POINT SUMMARY
by Rabbi Ephraim Becker
Kollel Iyun Hadaf, Yerushalayim
Rosh Kollel: Rabbi Mordecai Kornfeld
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Previous dafSukah 22
SUKAH 21-25 - my brother Ari Kornfeld has generously sponsored one month of
Dafyomi publications for the benefit of Klal Yisrael
1) MISHNAH: SUKAH MEDUVLELES
(a) A Sukah Meduvleles (to be explained) and/or whose shade
is greater than its sun is/are Kesheirah.
(b) If the S'chach is very thick (even though stars cannot
be seen from within) the Sukah is Kesheirah.
(a) Question: What is Meduvleles?
3) CHAVUT RAMI
(b) Answer (Rav): A 'poor' Sukah (thin S'chach).
(c) Answer (Shmuel): One whose S'chach is 'mixed,' laid one
piece high and one low.
(d) Rav taught 1.a. (above) as one case (it is Kosher even
though it is thin provided that its shade exceeds its
(e) Shmuel taught it as two cases (mixed as one Kosher
case; shade exceeding light as a second Kosher case).
(a) (Abaye) The Heter of Shmuel only applies if the higher
and lower pieces are not separated by three Tefachim.
(b) (Rava) The Heter applies even if they are three
Tefachim apart, provided that each plank is a Tefach
1. If less, then they need to be within three
Tefachim of one another.
(c) (Rava) My source for limiting Chavut Rami to a board
whose width is one Tefach is the Mishnah in Ohalos and
the Beraisa taught regarding that Mishnah.
2. This Heter is based on the principle of Chavut
1. The Mishnah provides the Halachah in every
permutation where a two-story structure has beams
in the ceiling of each story.
(d) Question (R. Ashi of R. Kehana who had just reported
Rava's assertion): But we see in the Beraisa that there
is Chavut Rami even with less than a Tefach width!?
2. Tumah is either allowed to flow upward or is
blocked by the Ohel created by the boards.
3. If the boards of the two stories are aligned with
one another, then Tumah rises unimpeded; if the
upper boards are above the spaces between the
lower boards, then Tumah anywhere in the building
is trapped as though it were all one room.
4. The Beraisa qualifies the Mishnah as applying when
the boards and the spaces between them are a
Tefach wide, in order to allow for Chavut Rami.
1. The Beraisa permits incomplete Koros at the
entrance to a Mavui with three (or, according to
R. Shimon b. Gamliel, four) Tefachim of space in
4) SHADE EXCEEDING LIGHT
2. Twin Koros, each less than the minimum Tefach
width, may be combined.
(e) Answer (R. Kehana): The Koros must be within three
Tefachim of one another (using Lavud, since we do not
say Chavut Rami with such narrow boards), and the
Beraisa is only reminding us of the minimum and maximum
permitted height for Koros.
3. R. Shimon b. Gamliel permits a space between the
two twin Koros, provided they are strong enough to
hold an Ariach (half-brick).
4. If the two twin Koros were at a different height,
then R. Yosi b.R. Yehudah teaches that we view
them as at the same height, provided that the
upper Korah is not above 20 Amos, and the lower
one is not below 10 Tefachim.
5. It would thus appear that we are permitting Koros
of less than a Tefach to combine through Chavut
(a) Question: Our Mishnah implies that were the shade and
light to be equal, the Sukah is Pesulah, while the
earlier Mishnah implies that equal shade and light is
5) S'CHACH AS THICK AS A ROOF
(b) Answer: It is Pesulah if equal at the S'chach level and
Kesheirah if it is equal at the ground-shade level
(since the shade must be greater at the S'chach level).
(a) A Sukah is still Kesheirah even if the stars are not
6) MISHNAH: A SUKAH WHICH IS MOVABLE OR IN A TREE
(b) If sunlight does not penetrate the S'chach it is Pasul
according to Beis Shamai and Kosher according to Beis
(a) A Sukah built on a wagon or boat is Kesheirah.
(b) On a tree or a camel is Kesheirah, but may not be
entered on YomTov.
(c) If one or more of its walls are in the tree, even if
the second or third are on the ground, it is viewed as
in the tree and may not be entered on YomTov.
(d) If three walls are on the ground we are not concerned
if the fourth wall is supported by the tree.
(e) The Sukah is tested by checking if it could stand
without the tree.