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1. The Gemara cites examples of acts one should not do on Shabbos because they are considered building.
2. The Gemara cites two ways to understand a certain dispute about using a sharp twig to roast meat on Yom Tov.
3. The Gemara discusses the laws of a poker (for fire).
4. On Yom Tov, one may not use as firewood a poker that broke on Yom Tov.
5. There is dispute about whether one is allowed to pile up branches for firewood in his yard on Yom Tov.
A BIT MORE
1. For example, one should not rest a large pot on top of the lids of two adjacent barrels, since this creates a tent (covered area) over the airspace between the barrels.
2. The Gemara concludes that if the sharp (detached) twig is dry, and therefore able to be used easily for roasting, it may be used for roasting on Yom Tov.
3. One should not search in the firewood for a sharp stick to use as a poker, since doing so appears as though he is making a vessel.
4. Although one is allowed to use vessels as fuel, broken pieces of vessels may not be used as fuel unless they were designated as such before Yom Tov.
5. Even though one is allowed to use the loose wood in his yard for firewood, the Tana Kama says that he should not make them into piles, since it appears as though he is preparing for after Yom Tov. Rebbi Eliezer permits making them into piles, since he is clearly cooking now and using them now (and therefore it does not appear as if it is for after Yom Tov).
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