Stone Column

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Stone Column
Vital statistics
Size (obj)Structure footprint in tile units.<br><br><i>Rounded-up from source.<br>Source: 0.526 x 0.526</i> 0.6 x 0.6
Skill(s) RequiredSpecific needed skills that enable a given object or item. Tunneling
Discovery Req.This(<i>discoveryreq</i>) is only for items that need to be discovered in addition to items listed in "Object(s) Required"/<i>(<i>objectsreq</i>).</i><small><br><b><i>(Temporary active on all pages, but leave empty if "None".</i></b><small> (None or Unknown)
Object(s) Required Stone x30, Bar of Hard Metal x1
Repaired With Nugget of Common Metal
Can be Lifted No
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Build > Buildings & Construction > Mine Construction > Stone Column

Stone Columns are mining support structures which prevent cave-ins in a eleven tile radius. They are generally more convenient to build in a mine due to being built with stone instead of wood or metal.
Stone Columns are the second tier of Mining support columns, between Mine Supports and Mine Beams.

Note: Mined tiles will still show dust animation (see Mining page) when under the radius of the support, to warn of cave-in tiles, but caveins won't occur under support.

Mine support take damage every time it prevents a cave-in.

For a mine support structure to prevent a cave-in, it must touch the center of the tile:

Quoted from Loftar
<SuperDaddy> Does it count if the radius is touching part of the tile?

<loftar> Well, to be precise, it needs to touch the exact center of the tile.

This means tiles covered by the column radius just slightly aren't supported.


Caution: whenever a mine support is removed, all tiles under it are checked for unstable mine tiles. If there are unstable tiles within range, which are now, with the removal of the mine support, unsupported, the removal will cause a cave in. This means that you can now tear down mine supports without cave ins, if you still have proper support around it

Support Radius

Up-scalable pixelated radius's. For fine tuned placement.

The squares around the column that are safe to mine.

All tiles marked in blue are safe to mine. Mining a tile outside of the blue area may cause a cave-in. This structure will support mining within a 11 tile radius.

Design guide for stone column

Notes

  • Stone Columns can be built on the surface and in houses too for aesthetics.


Game Development

  • Coq au Arch (2026-04-23) >"Character should no longer stop auto-mining when not planning to mine out unsupported tiles. Notable that the character would sometimes stop for no reason when excavating tunnels."
  • Melon Support (2026-03-05) >"Reworked the mine support display to one which properly indicates the actually supported tiles, rather than a somewhat difficult to read radius. The tiles indicated as supported are visually distinct; if only covered by a damaged support, if covered by multiple supports, or if in the placement mode for a new support. Let us know your mileage, and feel free to suggest improvements."
  • Loose Velvet (2023-06-22) >"When outside the protection of a mine support, encountering a mine warning tile (e.g. one near a cavein tile, where cave dust falls) will interrupt area mining operations."
  • Loose Velvet (2023-06-22) >"Mine Supports now take less damage when preventing cave ins (about 0.5x). When a Mine Support prevents a cave in, the normal collapsing stone effect is played on it to indicate that."