Museum (A1 sheet) — an ArchLang floor plan example
A 100 x 60 m museum issued on a real A1 sheet at 1:200, because at that size a web-scaled drawing stops working.
This plan compiles to 14 rooms, 6000 m² of floor area and 9 windows; every room is reachable from the entrance.
The source
This is the whole plan. The drawing above is what the compiler produced from it — nothing was drawn by hand.
# A ~100 x 60 m single-level museum — the LARGE-BUILDING flagship.
#
# What this example is for: everything else in examples/ is a dwelling, where the old
# "every size is a fraction of the drawing" rule happens to look right. At 100 m it does
# not — room labels come out metres tall. So this plan declares a SHEET:
#
# paper A1 landscape the drawing is issued on a real 841 x 594 mm sheet
# scale 1:200 which makes every annotation a fixed size ON THAT SHEET
# (3.5 mm room labels, 0.5 mm wall lines, 15 mm margins)
#
# A1 at 1:200 is the conventional GB/T presentation for a public building of this size:
# the 100 x 60 m footprint lands at 500 x 300 mm of ink with room for the three
# dimension chains and the title block. Drop the `scale` line and the sheet auto-fits
# the finest of 1:50 / 1:100 / 1:200 / 1:500 that fits — here, the same 1:200.
plan "City Museum" {
units mm
grid 100
paper A1 landscape
scale 1:200
north up
dims auto all
# ---- shell + structure ----------------------------------------------------
wall id=shell exterior thickness 300 { (0,0) (100000,0) (100000,60000) (0,60000) close }
# The spine: one 6 m corridor the full width of the building, with everything
# opening off it. Its two faces are the only walls the galleries need.
wall id=spine_n partition thickness 200 { (0,26000) (100000,26000) }
wall id=spine_s partition thickness 200 { (0,32000) (100000,32000) }
# North row dividers (galleries, then the service wing at the east end).
wall partition thickness 200 { (26000,0) (26000,26000) }
wall partition thickness 200 { (52000,0) (52000,26000) }
wall partition thickness 200 { (78000,0) (78000,26000) }
wall partition thickness 200 { (78000,14000) (100000,14000) }
# South row dividers (galleries, entrance hall, the WC stack and the cafe).
wall partition thickness 200 { (30000,32000) (30000,60000) }
wall partition thickness 200 { (48000,32000) (48000,60000) }
wall partition thickness 200 { (70000,32000) (70000,60000) }
wall id=wc_west partition thickness 200 { (76000,32000) (76000,60000) }
wall partition thickness 200 { (86000,32000) (86000,60000) }
wall id=wcw_s partition thickness 200 { (76000,42000) (86000,42000) }
wall id=wcm_s partition thickness 200 { (76000,52000) (86000,52000) }
# ---- north row ------------------------------------------------------------
room id=g1 at (0,0) size 26000x26000 label "Gallery 1"
room id=g2 at (26000,0) size 26000x26000 label "Gallery 2"
room id=g3 at (52000,0) size 26000x26000 label "Gallery 3"
room id=store at (78000,0) size 22000x14000 label "Store" uses storage
room id=office at (78000,14000) size 22000x12000 label "Offices" uses office
# ---- the spine ------------------------------------------------------------
room id=spine at (0,26000) size 100000x6000 label "Concourse" uses circulation hall
# ---- south row ------------------------------------------------------------
room id=g4 at (0,32000) size 30000x28000 label "Gallery 4"
room id=hall at (30000,32000) size 18000x28000 label "Entrance Hall" uses entry hall
room id=g5 at (48000,32000) size 22000x28000 label "Gallery 5"
room id=link at (70000,32000) size 6000x28000 label "Lobby" uses circulation
room id=wcw at (76000,32000) size 10000x10000 label "WC Women" uses wc
room id=wcm at (76000,42000) size 10000x10000 label "WC Men" uses wc
room id=plant at (76000,52000) size 10000x8000 label "Plant" uses utility
room id=cafe at (86000,32000) size 14000x28000 label "Cafe" uses dining
# ---- openings: the public route -------------------------------------------
# Main entrance (south facade) into the hall, then a wide threshold to the spine.
door at (39000,60000) width 2000 swing out
opening at (39000,32000) width 4000
# Galleries read off the spine through cased openings, not doors.
opening at (13000,26000) width 3000
opening at (39000,26000) width 3000
opening at (65000,26000) width 3000
opening at (15000,32000) width 3000
opening at (59000,32000) width 3000
opening at (73000,32000) width 3000
opening at (93000,32000) width 4000
# Service wing: offices off the spine, the store through the offices, and its own
# exterior service door on the north facade.
door at (89000,26000) width 1200
door at (89000,14000) width 1200
door at (89000,0) width 1200 swing out
# The WC stack + plant room open off the lobby.
door at (76000,37000) width 1200
door at (76000,47000) width 1200
door at (76000,56000) width 1200
# ---- glazing --------------------------------------------------------------
window at (13000,0) width 4000
window at (39000,0) width 4000
window at (65000,0) width 4000
window at (0,13000) width 3000
window at (0,46000) width 3000
window at (100000,20000) width 3000
window at (100000,45000) width 4000
window at (15000,60000) width 4000
window at (59000,60000) width 4000
# ---- structure: gallery column bays ---------------------------------------
# Four columns per north gallery, on the bay third-points (grid-snapped).
let BAY = 8700
for i in 0..3 {
let x0 = i * 26000
column at (x0 + BAY, 8700) size 600x600
column at (x0 + 2 * BAY, 8700) size 600x600
column at (x0 + BAY, 17400) size 600x600
column at (x0 + 2 * BAY, 17400) size 600x600
}
# The two deep south galleries carry their own bays.
for i in 0..2 {
column at (10000 + i * 10000, 41000) size 600x600
column at (10000 + i * 10000, 51000) size 600x600
column at (54000 + i * 12000, 41000) size 600x600
column at (54000 + i * 12000, 51000) size 600x600
}
# ---- sanitary fixtures ----------------------------------------------------
# `against wall <id>` places each piece BY CONSTRUCTION: the offset runs along that
# wall, the depth comes off its face, the rotation is derived from which side it lands
# on (`in <room>` picks the side), and a catalogued fixture needs no `size`. So a row
# of WCs is three offsets — no coordinates, no half-thickness arithmetic, and no
# fixture can end up floating or facing its own wall.
furniture wc against wall wcw_s offset 1500 in wcw
furniture wc against wall wcw_s offset 5000 in wcw
furniture wc against wall wcw_s offset 8500 in wcw
furniture basin against wall spine_s offset 79000 in wcw
furniture basin against wall spine_s offset 83000 in wcw
furniture wc against wall wcm_s offset 1500 in wcm
furniture wc against wall wcm_s offset 5000 in wcm
furniture wc against wall wcm_s offset 8500 in wcm
furniture basin against wall wcw_s offset 3000 in wcm
furniture basin against wall wcw_s offset 7000 in wcm
# ---- cafe fit-out ---------------------------------------------------------
furniture counter against wall spine_s offset 90000 size 6000x800 label "Servery" in cafe
furniture table at (89000,45000) size 1600x1600 label "Table" in cafe
furniture table at (93000,45000) size 1600x1600 label "Table" in cafe
# ---- reception ------------------------------------------------------------
furniture desk at (33000,38000) size 1800x800 label "Reception desk" in hall
furniture chair at (35200,39200) size 500x500 in hall
furniture chair at (33000,40500) size 500x500 in hall
furniture plant at (44000,55000) size 700x700 in hall
# ---- gallery seating & planting --------------------------------------------
# One bench and one plant per gallery — sparse-elegant, not empty — kept clear of
# the bay columns above.
furniture bench at (19000,20000) size 1800x500 in g1
furniture plant at (23000,2000) size 700x700 in g1
furniture bench at (45000,20000) size 1800x500 in g2
furniture plant at (49000,2000) size 700x700 in g2
furniture bench at (71000,20000) size 1800x500 in g3
furniture plant at (75000,2000) size 700x700 in g3
furniture bench at (24000,50000) size 1800x500 in g4
furniture plant at (26000,35000) size 700x700 in g4
furniture bench at (60000,55000) size 1800x500 in g5
furniture plant at (49000,35000) size 700x700 in g5
title { project "City Museum" drawn_by "ArchLang" date "2026-07-26" }
}