Structure
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Colonists can build structures of a 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 can be built out of any building material. Power conduits may be constructed in an existing wall. Smoothing natural stone walls allows conduits to be placed beneath them. Walls require 5 materials to construct.
| Material | HP | Cost | Work Required | Flammability | Beauty | Value [1] |
|---|---|---|---|---|---|---|
| Plasteel | 840 | 5 | 5 | 20% | 0 | $46.07 |
| Silver | 210 | 50 | 3 | 40% | 6 | $50.49 |
| Steel | 300 | 5 | 3 | 40% | 0 | $9.99 |
| Uranium | 750 | 5 | 5 | 0% | 0 | $30.92 |
| Jade | 150 | 5 | 12 | 0% | 10 | $27.43 |
| Wood | 195 | 5 | 2 | 100% | 0 | $6.34 |
| Gold | 180 | 50 | 3 | 40% | 20 | $500.00 |
| Granite blocks | 510 | 5 | 16 | 0% | 0 | $7.92 |
| Limestone blocks | 465 | 5 | 16 | 0% | 0 | $7.92 |
| Marble blocks | 360 | 5 | 15 | 0% | 1 | $7.67 |
| Sandstone blocks | 420 | 5 | 14 | 0% | 0 | $7.43 |
| Slate blocks | 390 | 5 | 16 | 0% | 0 | $7.92 |
- ↑ Not salable.
Doors
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 breaks ignore the forbidden status.
| Material | HP | Cost | Work Required | Flammability | Opening Speed | Value [1] |
|---|---|---|---|---|---|---|
| Gold | 96 | 250 | 13 | 20% | 100% | $2,505.00 |
| Granite Blocks | 270 | 25 | 88 | 0% | 45% | $41.36 |
| Limestone Blocks | 250 | 25 | 88 | 0% | 45% | $41.36 |
| Marble Blocks | 192 | 25 | 81 | 0% | 45% | $39.83 |
| Plasteel | 450 | 25 | 32 | 10% | 100% | $230.00 |
| Sandstone Blocks | 225 | 25 | 74 | 0% | 45% | $38.30 |
| Silver | 112 | 250 | 15 | 20% | 100% | $255.00 |
| Steel | 160 | 25 | 15 | 20% | 100% | $50.56 |
| Slate Blocks | 210 | 25 | 88 | 0% | 45% | $41.36 |
| Uranium | 400 | 25 | 27 | 0% | 90% | $155.81 |
| Jade | 80 | 25 | 71 | 0% | 100% | $140.3 |
| Wood Logs | 104 | 25 | 10 | 100% | 120% | $32.14 |
- ↑ Not sellable.
Bridge
Bridges are structures that can be built on water. Bridges allow more rapid movement across water. Once built, they can support most structures, including walls, but not particularly heavy structures. Bridges allow for easier building in swampy biomes. Floors may not be built atop bridges.
Bridges cost 12 wood each. They can be destroyed by fire or explosions, including whatever was built on top.
Autodoors
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 information, see the main article Autodoor.
| Material | HP | Cost | Steel Cost | Work Required | Flammability | Opening Speed | Value [1] |
|---|---|---|---|---|---|---|---|
| Gold | 96 | 250 | 40 | 17 | 20% | 100% | $2,645.00 |
| Granite Blocks | 270 | 25 | 40 | 113 | 0% | 45% | $186.76 |
| Limestone Blocks | 250 | 25 | 40 | 113 | 0% | 45% | $186.76 |
| Marble Blocks | 192 | 25 | 40 | 104 | 0% | 45% | $184.78 |
| Plasteel | 450 | 25 | 40 | 32 | 10% | 100% | $230.00 |
| Sandstone Blocks | 225 | 25 | 40 | 94 | 0% | 45% | $182.80 |
| Silver | 112 | 250 | 40 | 19 | 20% | 100% | $395.00 |
| Steel | 160 | 65 | - | 19 | 20% | 100% | $191.46 |
| Slate Blocks | 210 | 25 | 40 | 93[2] | 0% | 45% | $159.20[2] |
| Uranium | 400 | 25 | 40 | 64[2] | 0% | 90% | $3,130.00[2] |
| Jade | 80 | 25 | 40 | 64[2] | 0% | 90% | $2,645.00[2] |
| Wood Logs | 104 | 25 | 40 | 13 | 100% | 120% | $139.20 |
- ↑ Not sellable.
- 2 Not updated to actual Version 1.0 values
Roof
A roof is an area of cover from the elements. A roof can extend up to 6 cells from a wall, so roofed interiors have a maximum size of 12 cells across the shortest side. Interior areas built larger than this will remain partially unroofed. Larger roofed areas can be built with the use of interior walls as pillars. Indoor roofs are automatically built by Constructors. To build a roof outdoors, a "Build roof area" must first be drawn.
Drawing roof areas
Areas can be designated to have a roof, or not have a roof by drawing either a Build roof area or Remove roof area. This can be used to create outdoor roofed areas (to prevent snowfall or item deterioration), or indoor unroofed areas (protected Solar panels, indoor growing areas). If there is no supporting wall or rock within 6 tiles, no roof will be built.
Roof collapse
A roof will collapse if the last supporting wall or rock is removed, whether by mining, deconstruction, or destruction. Roof collapses cause injuries to colonists and damage items. If it's an Overhead Mountain collapsing, colonists will be buried alive.
Roof deconstruction
Drawing a "Remove roof area" will cause colonists to remove a constructed roof. Constructors will automatically go and safely remove the roofs without risk of collapse. Overhead Mountains cannot be removed this way, only by triggering a collapse.