A hatch cover (also called a floor hatch or just hatch) is, in effect, a door, but controlling the passage of Z-levels instead of along the same Z-level. They can be placed over downward stairs or ramp or open space, as long as they are supported by an adjacent floor tile.
Like doors, they can be linked with mechanisms, locked, and kept tightly closed to keep out water, pets and foes alike. They can be set as internal, but as rooms cannot occupy multiple Z-levels, this has no effect at this time.
When closed, hatches appear as a
¢ and are not visible when open. Their colour will vary depending on the material it has been made from.
As building destroyers cannot destroy buildings on other z-levels, they are quite effective at keeping out enemies.
A dwarf falling down stairs will be stopped by a closed floor hatch.
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