Kilayim requires less than Shabbos (Eruvin 11b)
R' Yochanan and Reish Lakish argue about some kind of a tzuras hapesach that might work for Shabbos and and might work for kilayim. The gemara isn't sure exactly in which case they argue (if it's on the side or top and if it's less than or more than 10) but one thing that is clear is that Shabbos requires at least as much as kilayim to make a wall and maybe more. It could be that this tzuras hapesach will work for kilayim but not Shabbos. Why?
posted by David @ 12:14 PM
3 Comments:
The difference, I believe, is that a wall for Shabbat has a "hekker" component, so people who see it don't carry in an improper manner.
Plants, assumedly, aren't walking anywhere, so you don't need to be so strict about how they are separated.
I don't think that the tzuras hapesach is because of a heker. Lechi and korah may be for heker but I don't think tzuras hapesach is.
Also, even if you assume it is for heker, the heker is the string at the top. Are you suggesting that there is a greater heker because either the poles holding up the string are less than 10 amos apart or because the string doesn't go across the top of the poles?
I was looking at the Pnei Yehoshua in maseches sukka today (to help me try to understand something on today's daf which I may yet post) and he says all the d'rabonnons are k'eyn d'oraisa tikun so even though this tzuras hapesach is only d'rabonnon it could be more chamur because Shabbos is an issur skila. Therefore in general even in d'rabonnons we are more machmir. (The truth is that he didn't say it to answer this question and I'm not positive if it really works to answer this question but maybe.)
You are right that the tzuras hapetach is a mechitzah, not for heker. I was thinking of today's Daf, where the mechitzahs for kilayim are discussed, and they are very different than for Shabbat.
The obvious difference, it seems, is that it doesn't take as much "wall" to be a wall for plants. The distinction I would draw is that, since plants don't walk, they could have lower standards for a mechitzah.
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