Responsa for Eruvin 176:4
תנן חצר ואכסדרה מצטרפין לד' אמות בשלמא לרבי זירא ניחא אלא לרבה קשיא
We learned: THE COURTYARD AND THE EXEDRA<span class="x" onmousemove="('comment',' It is now assumed that the exedra was situated in a corner of the courtyard so that the width of the latter was not increased by it.');"><sup>9</sup></span> MAY BE COMBINED TO MAKE UP THE PRESCRIBED FOUR CUBITS. According to R'Zera this is quite acceptable;<span class="x" onmousemove="('comment',' Since the floor of the exedra, whatever its position, would add to the area of absorption.');"><sup>10</sup></span>
Teshuvot Maharam
Q. On the Sabbath, may a Jew use latrines which are built in the city wall and open into a ditch surrounding the wall, so that the feces falling into the ditch are moved (by his force) from one Sabbath domain into another?
A. He should fasten a board beneath the seat (within not more than three tefahim below the latrine walls) so that the feces first fall on the board and then into the ditch. Should the board break on the Sabbath, he would still be permitted to use the latrine on that day.
SOURCES: Cr. 178, 179; Pr. 96; L. 349; Mord. Shabb. 376; Hag. Mord. Shabb. 461; Tashbetz 38; Hag. Maim., Shabbat 15, 4; Kol Bo 31 (p. 34a). Cf. Terumat Hadeshen 66.
A. He should fasten a board beneath the seat (within not more than three tefahim below the latrine walls) so that the feces first fall on the board and then into the ditch. Should the board break on the Sabbath, he would still be permitted to use the latrine on that day.
SOURCES: Cr. 178, 179; Pr. 96; L. 349; Mord. Shabb. 376; Hag. Mord. Shabb. 461; Tashbetz 38; Hag. Maim., Shabbat 15, 4; Kol Bo 31 (p. 34a). Cf. Terumat Hadeshen 66.
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