Corpse bearers that will be passing under a portico, and one of them shut the door and closed it with the key — if the door can remain closed by itself, [the house] re-mains tahor, but if not, [the house] becomes tamei. A similar case would be where a barrel of dried figs or a box of straw was placed in a window. If the dried figs or straw can remain in place by themselves, [the contents] remain tahor, but if not, everything becomes tamei. A house was partitioned with jugs that were plastered with clay. If the clay can remain [in place] by itself, [the other side of the house] remains tahor, but if not, it becomes tamei.

A wall constructed to be part of a house is ruled half and half. How so? An exterior wall contains tumah: [if the tumah is] in the inner half [of the wall], the house be-comes tamei, and someone standing above [the wall] remains tahor. [If the tumah is] in the outer half, the house remains tahor, and someone standing above [the wall] becomes tamei. [If the tumah is] in the middle, the house becomes tamei. [Regarding the per-son] standing above [the wall] — R’ Meir declares him tamei, but the Sages declare him tahor. R’ Yehudah says: The entire wall is [ruled as] part of the house.