Translation:Mishnah/Seder Moed/Tractate Sukkah/Chapter 2/2
One who supports his sukkah with the legs of the bed, it is fit for use.
Rabbi Yehudah says, if it is unable to stand on its own, it is unfit for use.
A sukkah which is uneven (i.e. the schach is not all on the same level) and whose shade is more than its sun, is fit for use.
One which is thick like a house (i.e. the layer of schach is very thick like the roof of as house), even though the stars are not seen from within it, it is fit for use.