v0.31:Grate

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A grate is a Template:L-type item. It is used as a construction material for wall grates and floor grates. Grates can be constructed from Template:L or Template:L (with the Template:L Template:L at a Template:L), wood (with the Template:L labor in a Template:L), Template:Ls (with the Template:L labor at a Template:L), or Template:L (with the Template:L labor at a Template:L).

Wall Grate

A wall grate is basically a Template:L, but with 2 differences:

• It is a Template:L instead of a Template:L. It doesn't overwrite the tile below it, and it can be smashed by building destroyers.
• It can be linked to a Template:L or Template:L. Once linked, it works like a linked Template:L which doesn't stop fluids, Template:Ls or Template:L 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.

Floor Grate

A floor grate blocks Template:L and item movement like a Template:L, but it lets Template:L, Template:L, 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 Template:L (i.e. not diagonally) to firm ground or some solid construction (a Template:L, Template:L, 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 Template:L, 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 Template:L immediately after being completed. This can be useful for controlled cave-ins.

You can not have a Template:L on floor grates.

Tiles below a floor grate do count as inside. They will not stop light. Once a tile has been exposed to light, it will always display as light.

If a floor grate is place right on top of a Template:L floor or Template:L floor it will prevent Template:L, Template:Ls and Template:L from growing.

Floor grates do not block Template:L or taking water directly from a Template:L, nor do they block collecting Template:L or Template:L, though they do prevent Template:Ls from working if between the well and the water.

Floor grates seem to dismantle when a heavy object, like a boulder, plumets on to it, say, from a waterfall, but stuff like fish falling from a waterfall just collect on it. It seems there is a point in which the grate dismantles, more testing is needed.

Bars vs. Grates

Vertical/horizontal Template:L 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 Template:L 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.

Notes

• 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."

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