A chair whose center slat was removed and the outer ones remain, is tamei. [If] the outer [slats] were removed and the center [slat] remains, it is tamei. R’ Shimon says: If it was one handbreadth wide.

[Regarding] a chair whose two adjacent slats were removed: R’ Akiva rules [it] tamei but the Sages rule [it] tahor. R’ Yehudah said: Even a bridal chair whose panels were removed and a receptacle remained in it is tahor, since the primary [function] is disabled and the secondary [function] is [also] disabled.