Structure

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Colonists can build structures of various materials, each with different beauty, flammability, and hit-points. Enclosed areas will automatically prompt colonists to build a roof unless you apply a no roof region, or if the structure is too large (over 300 cells). Structures leave ash on the ground when burnt.
== Walls ==
Walls are impassable structures capable of supporting a roof. Walls obstruct a pawn's line of sight, though pawns can lean into a free space next to a wall to fire at enemies from behind cover. Walls obstruct the spread of light, enclose rooms for temperature, cleanliness, beauty and other mechanics. They can be made out of any non-textile building material. Power conduits may be constructed inside walls to remove their beauty penalty. Smoothing natural stone walls allows conduits to be placed beneath them. Walls require 5 materials to construct.
=== Constructed walls ===
=== Natural walls ===
These cannot be constructed, only mined, but act largely like walls and are provided for comparisons sake. All natural walls have negative beauty.
Material	Material 	HP	Flammability	Beauty	Value Not sellable.
 	Compacted plasteel 	 	 	 	
 	Silver ore 	 	 	 	
 	Compacted steel 	 	 	 	
 	Uranium ore 	 	 	 	
 	Jade 	 	 	 	
 	Gold ore 	 	 	 	
 	Compacted machinery	 	 	 	
 	Granite 	 	 	 	
 	Limestone 	 	 	 	
 	Marble 	 	 	 	
 	Slate 	 	 	 	
 	Sandstone 	 	 	 	
=== Smoothed walls ===
Smoothed walls are created from natural stone walls. Pawns assigned to the Construct work-type will smooth natural stone walls and rough stone floors designated for smoothing via the Smooth Surface order (Architect tab>Floors.)
The pawn stat Smoothing Speed governs this task and is dependent on a pawn's Global Work Speed, Construction skill, Manipulation and Sight. Natural stone walls have a beauty penalty, while smoothed walls increase beauty and wealth. Smoothed walls despite having the same HP as natural walls, can be fully repaired by pawns assigned to Construct. As such they are superior to natural walls as support structures for your colony.
Material 	HP 	Work Required	Flammability	Beauty	ValueNot sellable.In versions prior to 1.5.4241, all smooth walls had an actual value of 1 for wealth calculations.	Cover Effectiveness
Smoothed Granite Wall 	900	 	0% 	1 	7 	75%
Smoothed Limestone Wall	700	 	0% 	1 	7 	75%
Smoothed Marble Wall 	450	 	0% 	2 	7 	75%
Smoothed Sandstone Wall	400	 	0% 	1 	7 	75%
Smoothed Slate Wall 	500	 	0% 	1 	7 	75%
== Doors ==
=== Door ===
Doors provide entry points through walls for colonists while still keeping out enemies and wild animals. Pawns manually open doors which causes a delay as they try to pass through, as opposed to autodoors which open on demand and allow faster passage. All doors are generally locked to hostile entities, including prisoners, raiders and mad animals. A door can be marked to "Hold open," which means the next time it is opened, it will stay open, and then all pawns can pass through. A door can also be marked "Forbid". Colonists and tamed animals don't use forbidden doors, even if they're held open. However visitors, traders, and colonists on mental breakdowns ignore the forbidden status.
=== Autodoor ===
Autodoors are regular doors that open and close 4x as fast, but need to constantly draw 50 W of power. Lacking sufficient power, they lose the speed bonus and act like regular doors, until power is returned.
Powered autodoors made of stone open slightly faster than regular wooden doors. Powered autodoors made of any material other than stone open fast enough that pawns are not slowed down when passing through.
In all other aspects, an autodoor is identical to a regular door made of the same material.
Construction requires 30% additional work, 40 steel and 2 components on top of the 25 base material for the regular door.
For more info, see the main article Autodoor.
== Bridge ==
Bridges are structures that can be built on water. Bridges allow more rapid movement across water. Once built, they can support many structures, including wooden walls, but not particularly heavy structures including any other type of wall. Bridges allow for easier building in swampy biomes. Floors may not be built atop bridges.
Bridges cost 12 wood each. They can be damaged or destroyed by fire or explosions, including whatever was built on top.
== Column ==
Columns are passable structures which are capable of holding a roof which do not block sight, or movement and look quite nice. They have x/1.875 (.533x) of a wall's normal health, 4x the beauty, and 4x the value. They also have 25% cover effectiveness and do not slow down pawns. These were introduced in 1.1.
== Version history ==
* 0.3.410 - The unpowered "Simple Door" added.
* 0.4.460 - Stone wall health raised from 400 to 650.
* Beta 19/1.0 Update - You can now smooth natural rough rock walls into high-quality walls
* 1.5.4062 - Market value of smoothed walls was unified to 7 (previously: sandstone 18, granite, limestone and slate 20, marble 25).
Category:Buildings