The first floor is primarily military, with the walls and long twisting paths around the perimeter of the fort were set up to help control enemy troop movement and provide some shelter from enemy archers when the melee dwarves need to fight out in the two courtyards. Copper menacing spike traps are being set up and linked to a lever for when inevitable zombie, elf, and goblin floods need to be reduced.
Once enemy troops get through the maze into the courtyards they are shot at from the archers a z-level above. If troops get into the three-tile-wide hallway the ballistae is
supposed to shoot at them, although so far it's seen no real use. It looks cool though. Ammo for the weapon is kept stocked around it. hostiles must then fight their way through the dual barracks on each side, where dwarf military is constantly training. The fortifications can be accessed through these barracks, and once all archers are at their post I can simply lock the doors to keep them at their post.Armor and weapon stocks are located under the fortifications, in those branching areas.
The hospital is built around the ballista pillbox, possibly the safest area in the fort. It can only be accessed through the stairs from the dining room located above. If enemy troops get that deep into the fort then it's already been lost. Small cloth and soap stockpiles are kept along the pillbox there.
The workshops are small and relatively few, usually one per type, except for those five mason shops by the stairs there. The masons are kept on constant duty pumping out marble and limestone blocks to keep Axehole expanding, generally they've kept up with demand. Sometimes they burn through the rocks too fast though, and progress is temporarily halted as the stockpile for economic rock is refilled by the hauling peasants. In terms of efficiency it's ok I guess, though the stockpiles are kept several layers down. I still need to floor the paths around the workshops, but it's a minor detail.