Varies wildly from fort to fort. Currently I'm trying out a more compact design, hoping that there will be longterm benefits FPSwise.
- on the surface we have a small castle with a grazing area and a refuse pile. Eventually it will be a small tower with barracks and bee hives on top of it. In a hill on the surface lvl are the rooms that were the starting fort, now used for trade depot, barracks and wood stockpile.
- on lvl -1 the soil parts have been completely mined out for tree farming. There are also farms for above ground plants.
- lvl -2 is the same but with bigger farms for underground plants. Also has a well feeding from the surface river.
- on lvls -3 - -9 there are ores and flux, so only mining operations
- lvl -10 has all non-magma-workshops, the hospital and non-grazing animals
- lvl -11 has huge rooms, most stockpiles are here
- lvls -12 and -13 are living areas with 2x4 bedrooms
- lvl -15 has noble rooms, a huge dining room and the central meeting area.
- lvl -16 has prison cells, an atomsmasher, an execution pit and a pet shredder. If I get my hands on a GCS there will also be a silk farm.
- lvl -17 has the entrance to the first cavern
- lvl -29: entrance to the second cavern
- lvl -40: 3rd cavern entrance
- lvl -49: crypts, quite big but currently somewhat empty
- lvl -54: magma workshops with ore and metal storage
I rarely pump magma up because it hurts my FPS too much. This fort is still in 34.07, so hauling ore 54 lvls down is no problem.