What is the status of a bench or stool that lost a leg on Shabbat?

Synopsis

If even one leg of an oven came out, it is muktzeh. The Rema extends this to a bench that lost one or two legs — it is forbidden to move or prop on another bench and sit on it, unless one had sat on it in such a fashion before Shabbat. Reinserting the leg is forbidden due to building.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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