Yerushalmi Eruvin 10:8 ירושלמי עירובין י׳:ח׳

MISHNAH: A tree which gives a round shadow¹⁸The Babli and Maimonides read מיסך. on the ground, if its crown is less than three hand-breadths from the ground one may carry under it¹⁹If the branches reach close to the ground for more than half the circumference, they define the space under the tree as a private domain.. One may not put back the door of a shed²⁰It is presumed that the door does not move on hinges but has to be taken off and put back on some hooks. Then it is impossible to move the door without creating an impression in the dirt floor. Since this is a necessary consequence of moving the door, it qualifies as intentional digging, a Sabbath violation. The same argument applies to the other examples in the Mishnah., or the thorns in a breach, or a mat, unless they are higher than the ground.

HALAKHAH: ¹¹⁵Discussion of Mishnah 7. The domain under a tree becomes private only if the branches are low enough to count as partitions and the entire area under the tree is not more that 5’000 square cubits since it is not fenced in for human dwelling. Chapter 4, Notes 58–60; Babli 99b. Only it should be no larger than two bet se’ah, or the walls ten [hand-breadths] high,⁹Šabbat 1, Note 68. nor the opening wider than ten [cubits], nor what was standing was opposite what was standing and what was breached opposite the breached.

Paragraph¹¹⁶Discussion of the sentence regarding tree roots. The text also is in Beṣah 5:2 (63 a l. 12). The Babli 100a reads the Mishnah differently.. Rebbi Aḥa in the name of Rav: It is forbidden to (tear off) [trample on]¹¹⁷With the text in Beṣah read לדוש instead of לתלוש. Tearing off branches is agricultural work and biblically forbidden as harvesting. roots of a vine on the Sabbath. There is no difference between the roots of a [barren] tree or the roots of cabbage. If they are three [hand-breadths] high. But if they are not three [hand-breadths] high they are like the ground.

The Mishnah¹¹⁸Discussion of the sentence about doors (cf. Note 20). refers to the case that there are no hinges. But if there are hinges that is what was stated¹¹⁹The text is from Šabbat Chapter 5, Notes 32–34. For גודר “fence in” one has to read גורר “drag” with the text in Tosephta 8:12, Šabbat loc. cit., and the quotes by R. Ḥananel (last sentence in his Commentary to Beṣah Chapter 2) and Or zaruaˋ Šabbat §55 (p. 67b) which refer to the last Chapter of Eruvin and read גורר.: “a hinged door, a hinged mat, hinged lattice gates³³A certain water well, not every well., one may open and lock on the Sabbath, and it is not necessary to say on a holiday. If a mat was tied to and hanging from a pillar, one may open and lock on the Sabbath, and it is not necessary to say on a holiday.”