Shabbat 126a and Shabbat 126b, finishing Kol HaKeilim with a discussion of items that attach to fixed structures, when they look too much like boneh, adding to a fixed structure, like window shutters, or the covers for items fixed in the ground. Then starting Mefanin, about the kinds of physical effort permitted on Shabbat in order to make room for guests or students coming to hear a shiur.
