(Mishnah): If the foliage of a tree hangs within three Tefachim of the ground, one may carry under it;

If its Sharashim (roots, or branches coming out of the trunk) are above three Tefachim, one may not sit on them.

. A door to Rachbah (a Chatzer in back of houses), bundles of thorns [put] in a breach in a wall [to seal it], and a [reed] mattress - one may not close [an opening with them, for it looks like building] unless they are [held] above the ground.

(Gemara): [One may carry under the foliage of a tree] as long as it is not more than Beis Sa'atayim, and the walls [created through the foliage] are 10 high, and there are not breaches more than 10 [Amos], and there is not Omed (standing wall) opposite Omed and Parutz (breach) opposite Parutz.

(R. Acha citing Rav): One may not detach root branches on Shabbos. Tree roots and cabbage roots have the same law, if they are three high. If they are not three high, they are like the ground.

Our Mishnah is when [the doors] do not have hinge-pins. (To open it, one rests it on the ground.) If they have hinge-pins (they always stand, and swing open or closed), this is like a Beraisa teaches, [a hanging] door that drags, mat that drags, or Kankilon (a perforated Kli for fumigating Kelim) that drags, one may open and close them on Shabbos, and there is no need to say so on Yom Tov.

1. A mat that is tied and hangs [above the ground], one may open and close it on Shabbos, and there is no need to say so on Yom Tov.