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mansion — writing the typical floor once

examples/mansion.muro. 192 lines / 122 spaces / 332 boundaries / 2,366.40 m² of interior floor area / 162.16 m² semi-outdoor. A ten-storey apartment building of 43 dwellings with interior corridors. 122 spaces fit into 192 lines because the typical floor is written exactly once.

mansion L1

mansion L5

mansion L10

What it shows first​

  • Range declaration of levels — level L3..L9 6700 pitch:2900 h:2400 slab:500. Seven levels in arithmetic progression on one line.
  • Span expansion of paths — a first segment of L2..L9 expands across the declared levels in z order. space, zone and boundary all expand, and indented doors come along to every expansion.
  • stack — stack ev L1..L10 type:shaft draws vertical boundaries across every consecutive level pair at once. Nine lift shafts and nine stair connections in two lines.
  • Mixed granularity — only type A is divided into rooms; B through E stay whole dwellings. zone /L2..L9/A keeps the vocabulary of net floor area, so divided and undivided dwellings are counted on the same footing.
  • Daylight across a balcony — a coefficient of 0.7 if something sits above the balcony, 1.0 if nothing does. One line produces a different answer on different storeys.
  • An external stair — a single boundary of spec:手すり air:1 makes it semi-outdoor, and the stair moves out of the interior floor area into a separate line.
  • Openings decomposed — a full-height sliding assembly is written as a sliding leaf (door) and a fixed light (window). An opening is for passage or for daylight; one opening never claims both.

Excerpts​

Eight typical floors start here. /L2..L9/ expands eight times.

zone /L2..L9/A name:Aタイプ use:exclusive
space /L2..L9/A/ldk     ldk     X1+2600..X2 Y1..Y2-1800 + X1..X1+2600 Y1..Y1+1400 name:LDK
space /L2..L9/A/bedroom bedroom X1..X1+2600 Y1+1400..Y2-1800 name:洋室
space /L2..L9/A/balcony balcony X1..X2 Y1-1400..Y1 name:バルコニー
space /L2..L9/B unit X2..X3 Y1..Y2               name:Bタイプ use:exclusive

Vertical circulation is the last two lines.

stack ev L1..L10 type:shaft
stack stair L1..L10 type:stair

stack ev L1..L10 type:shaft reads as "for all nine pairs L1↔L2, L2↔L3, …, L9↔L10, draw a shaft boundary between the /L?/ev spaces". The external stair likewise. Two lines raise eighteen vertical boundaries.

The opening onto the balcony is written as passage and daylight separately.

boundary /L2..L9/A/ldk /L2..L9/A/balcony t:180 spec:EW fire:60
  door w:1200 h:2200 at:X1+1400 name:掃き出し引違い
  window w:2600 h:2200 sill:0 at:X1+4000 name:掃き出し窓
boundary /L2..L9/A/balcony /out t:120 spec:手すり air:1 h:1100

That last line (spec:手すり air:1) is what makes the balcony semi-outdoor. The railing is physically there and blocks neither air nor light.

Questions worth putting to it​

How many doors from the fifth-floor LDK to the outside​

The external stair is type:stair, so it is passable, and it carries no doors — so descending any number of storeys adds none.

npx tsx src/cli.ts doors examples/mansion.muro /L5/A/ldk /out
3 doors — /L5/A/ldk → /L5/A/hall → /L5/corridor → /L5/stair → /L4/stair → /L3/stair → /L2/stair → /L1/stair → /out

The route passes through eight spaces and three doors.

Can one written line give different answers on different storeys​

It can. The typical-floor window is written once, but the verdict is issued for all 51 rooms after expansion.

npx tsx src/cli.ts light examples/mansion.muro
✔ /L2/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L3/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L4/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L5/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L6/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L7/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L8/A/ldk	LDK	window 4.00 m2 / floor 17.08 m2 = 1/4.3 (needs 1/7 ≈ 2.44 m2)
✔ /L9/A/ldk	LDK	window 5.72 m2 / floor 17.08 m2 = 1/3.0 (needs 1/7 ≈ 2.44 m2)

(Only the eight type-A LDK lines are shown. The full output is 52 lines, ending in ✔ Every room meets 1/7 — 51 rooms in scope.)

The full-height window is 2.6 × 2.2 = 5.72 m². On floors 2 through 8 it counts as 4.00 m²; on the ninth it stays at 5.72. Nothing sits above the ninth-floor balcony. There is nowhere to write a roof, and "what is above" is read off the arrangement of spaces on the levels overhead.

Can a divided and an undivided dwelling be counted together​

They can. The zone keeps the word "one dwelling".

npx tsx src/cli.ts stats examples/mansion.muro
By zone (counted aggregation):
  /L2/A	Aタイプ	34.80 m2
  /L3/A	Aタイプ	34.80 m2
  /L4/A	Aタイプ	34.80 m2
  /L5/A	Aタイプ	34.80 m2
  /L6/A	Aタイプ	34.80 m2
  /L7/A	Aタイプ	34.80 m2
  /L8/A	Aタイプ	34.80 m2
  /L9/A	Aタイプ	34.80 m2

Type A is split into four spaces — LDK, bedroom, wet core, entrance hall — but as a zone it is one dwelling of 34.80 m². Types B to E are not split, so the space itself is the dwelling. From the counting side the difference does not arise.

The totals at the end read:

Total 2366.40 m2 (indoor floor area)
Semi-outdoor 162.16 m2 (balconies, external stairs and the like — whether they count is a matter of regulatory detail, so it is reported separately)
By use: common 662.40 m2 (28.0%) / exclusive 1704.00 m2 (72.0%)

The 162.16 m² of semi-outdoor is the balconies and the external stair. Whether they count is a matter of regulatory detail, so they are never folded into the total.

  • Site polygons and exception floors written as a difference — tower
  • Writing vertical circulation — basement