v0.34:Floor

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A floor is a fixed map tile that creatures can walk upon (as opposed to movable features like bridges and hatches). A floor can be:

1. natural, as found on the surface and in caverns
2. artificial, as created by mining
3. constructed
4. implied, by constructing walls on the z-level below

Note that the different types of floors may be combined: constructed floors can be built over natural, artificial, or implied floors; and an implied floor can be added below any other type of floor. Though it is possible to create a floor with an empty tile below, all wall tiles will have an implied floor above them.

Removing floors

Natural and artificial floors can be removed by channeling (d-h); constructed floors can be removed with d-n. Implied floors may only be removed by deconstructing the wall on the level below. The material used to build the floor will be recovered after the deconstruction.

Removing floors can cause cave-ins if done incorrectly. This often leads to fun if the floor happens to overhang the dining hall or other central area. Floors should always be removed in multiple steps, starting at the furthest locations from the support(s) and moving in.

Examples

Key:

+	Support - either a wall below or a staircase
+	Unsupported floor, unable to be safely removed
+	Floor able to be safely removed
.	Previous site of (removed) floor

3x3 floor, supported in middle

This example usually has a staircase in the middle supporting it, instead of a wall below (in that case, there would need to be another access point for dwarves to remove the floor, which would make this example much more complicated).

+	+	+
+	+	+
+	+	+

Removing corners first

+ + + + + + + + +

→

. + . + + + . + .

→

. . . . + . . . .

Floors are not supported diagonally, so removing all floor tiles orthogonal to another floor will result in a cave-in.

Leaving supports for all corner floors

+ + + + + + + + +

→

. + . . + . . + .

→

. . . . + . . . .

Dwarves can stand on the red or grey tiles to remove floors. Dwarves will not remove floors that another dwarf is standing on, so if a dwarf decides to stand on a green floor, the removal job could be cancelled.

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