40d:Pressure plate

Pressure plates work somewhat like levers, but instead of being actively toggled, they're activated by the weight of something on them.

Pressure plates are not configured during use, but upon placement. While placing a pressure plate, you can configure it to trigger when the following things are on it:

• Water/Magma - choose minimum and maximum levels
• Creatures - choose minimum and maximum size; creatures of the size selected will be listed as example. You can pick whether your own citizens will trigger the plate or not.

Pressure plates default to toggleable, where they toggle on when the determined weight is upon them and toggle off when it's released. Pressing o will change them to one-use mode, where upon being activated, they do their work and cease to operate altogether.

A toggleable trap may prove useless when there is a large amount of invaders walking back and forth over it, as there will not be enough time for it to activate before it is switched again. Pressure plates can be linked to all the same objects levers can. Berserk dwarves will set off pressure plates.

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