Characters can damage objects with their weapons, tools, spells, and in some instances their bare hands. Objects can be affected by physical and magical attacks much like creatures can, subject to the following limitations. (87, 203)
Damage Types. Objects are immune to poison and psychic damage. Some damage types are more effective against a particular object or substance than others. For example:
Can a fighter cut through a section of a stone wall with a sword? No, the sword is likely to break before the wall does.
Bludgeoning damage works well for smashing things but not for cutting through rope or leather.
Paper or cloth objects might be vulnerable to fire and lightning damage.
A pick can chip away stone but can’t effectively cut down a tree.
AC and Hit Points. Given enough time and the right tools, characters can destroy any destructible object. When time is a factor, you can assign an AC and hit points to a destructible object. See the table for suggested AC values and hit points for various objects. You can also give an object immunities, resistances, and vulnerabilities to specific types of damage.
Saving Throws. Objects always fail Strength and Dexterity saving throws, and they are immune to effects that require other saves.
Damage. When an object drops to 0 hit points, it breaks. Special rules may apply to huge and gargantuan objects.