מסכת כלים

פרק יט משנה ו

If a zav is supported by a bed

A bed

that was wrapped with a mizran,

and a corpse touches them,

they are tamei with seven-day tumah,

if they separate,

if a sheretz touches them,

they are tamei the tumah of a night,

if they separate

they are tamei the tumah of a night.

A bed [that was tamei]

from which two of its long boards were removed

and one made new ones for it

and did not change the notches (in the bed's legs that holds these boards, so the old boards can still be put back),

if the new ones break,

[the bed is still] tamei,

and if the old [boards broke]

it is tahor,

as everything depends on the old ones.

A [wooden] chest

that has its opening on it top (it had a hinged door on its side or top)

is susceptible to tumah from a corpse (but not midras).

If it was damaged on top (i.e. the lid was removed)

it is (still) susceptible to tumah from a corpse,

if it was damaged on its bottom (its floor was damaged such that it can no longer hold anything)

it is tahor,

the compartments in it

are tamei (even though the bottom of the chest is gone, these sub-compartments within the chest can still hold items)

and are not connected to it (because the chest and the compartments do not work together to perform their function, as opposed to something like a mizran and a bed).