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A grate is a furniture-type item. It is used as a construction material for wall grates and floor grates. Grates can be constructed from stone or ore (with the masonry labor at a mason's workshop), wood (with the carpentry labor in a carpenter's workshop), metal bars (with the blacksmithing labor at a forge), or glass (with the glassmaking labor at a glass furnace).
A wall grate is basically a fortification, but with 2 differences:
- It is a building instead of a construction. It doesn't overwrite the tile below it, and it can be smashed by building destroyers.
- It can be linked to a lever or pressure plate. Once linked, it works like a linked door which doesn't stop fluids, arrows or Miasma when closed.
Wall grates set the boundary for the room being resized, but they do not provide support for the doors construction. Unlike a constructed wall, the grate has some quality level and can be decorated.
A floor grate blocks creature and item movement like a floor hatch, but it lets water, magma,
and ranged attacks through like an open tile. It doesn't block line of sight. It can be linked. Triggered, it opens like a hatch, but with a 100-tick delay.
Floor grates must be attached orthogonally (i.e. not diagonally) to firm ground or some solid construction (a wall, floor, etc) if they are to be supported over empty space, not (just) other grates. Floor grates can also be placed directly on top of a non-constructed floor or staircase, rather than empty space, in which case it doesn't need any support next to it.
A floor grate does NOT count as solid construction. It will not support any buildings or constructions. However, you can designate a construction to be built orthogonally to it with no other supports. This will cause the construction to cave-in immediately after being completed. This can be useful for controlled cave-ins.
Stockpiles cannot be placed over floor grates.
Like bridges and floor hatches, floor grates will mark areas beneath them as being "inside", even if they are retracted.
If a floor grate is place right on top of a soil floor or muddy floor it will prevent grass, shrubs and saplings from growing.
Floor grates do not block fishing or taking water directly from a water source, nor do they block collecting sand or clay, though they do prevent wells from working if between the well and the water.
Bars vs. Grates
Vertical/horizontal bars seem to be functionally identical to wall/floor grates. The only notable difference between grates and bars is that grates are finished goods (which must be produced from raw materials) and have quality levels (and thus boost your fortress's architecture value significantly), while bars are simply raw materials that can be thrown into place at a moment's notice and then deconstructed later should they be needed later for other jobs.
- If you wish to remove a floor piece that is linked to a grate, make sure that the dwarf that carries out the job does not stand on the grate, or remove all grates first. The grate will not be supported, and fall (with your uncareful dwarf on it), and you will experience the famous equation: "It's not the fall that kills you, it's the sudden stop at the end."
Barracks • Bedroom • Dining room • Dormitory • Jail • Meeting hall • Hospital • Office • Sculpture garden • Tomb • Zoo
Animal trap • Anvil • Armor stand • Bed • Bin • Box • Bucket • Cabinet • Cage • Coffin • Restraint • Seat • Statue • Table • Weapon rack
Fortification • Floor • Stairs • Ramp • Wall
|Machine & Trap parts|
Axle • Gear assembly • Millstone • Screw pump • Water wheel • Windmill • Lever • Pressure plate • Trap • Support
Archery target • Kennel • Shop • Siege engine • Trade depot • Wagon • Well