Sources — Joglo — Rumah Adat Nusantara

Every dimension the house is generated from is below, with its class and its citation. This is the project’s honesty layer, and it is given a room of its own because a smooth 3D render implies a precision the sources do not have.

The dimensions

Dimension	Value	Class	Citation
Spacing between the soko guru, both ways. This square is the centre of the house and the whole plan grows outward from it — so it also sets how much of the roof the brunjung occupies. Too small, and the roof reads as a wide flat apron with a small hat on it rather than as a steep centre with a skirt around it.guruSpan	4.80 mIf 20% out: 0.96 m	Interpolated	No source
How far each ring of pillars stands outside the one within it.ringStep	1.55 mIf 20% out: 1.24 m	Interpolated	No source
Section of a soko, the pillar.sokoSection	0.22 mMoves no measurement	Interpolated	No source
Height of a soko guru from its umpak to the head, where the tumpang sari begins.guruHeight	3.40 mIf 20% out: 0.68 m	Interpolated	No source
How much shorter each ring of pillars is than the one within it. Together with the ring spacing this number is the penanggap pitch — there is no separate dimension for it, because the pitch of a roof resting on pillars is the height difference over the distance. One consequence is that every penanggap tier has the same pitch: the break this joglo shows is between the penanggap and the brunjung, not between one penanggap tier and the next.ringDrop	0.78 mIf 20% out: 0.43 m	Interpolated	No source
Height of an umpak, the stone a soko stands on.umpakHeight	0.38 mIf 20% out: 0.08 m	Interpolated	No source
Width of an umpak at its foot.umpakWidth	0.44 mMoves no measurement	Interpolated	No source
Height of the floor above the ground. A raised floor, not a house on stilts: there is no room beneath it, and this is where the joglo differs most sharply from the other two houses.floorRise	0.35 mIf 20% out: 0.07 m	Interpolated	No source
Thickness of the floor.floorThickness	0.08 mIf 20% out: 0.02 m	Interpolated	No source
Height of the gebyok wall from the floor.wallHeight	2.50 mMoves no measurement	Interpolated	No source
Thickness of a gebyok board and of a senthong partition.wallThickness	0.07 mMoves no measurement	Interpolated	No source
Depth of the senthong from the rear wall.senthongDepth	2.20 mMoves no measurement	Interpolated	No source
How far each tier of the tumpang sari rises above the one below it.tumpangRise	0.19 mIf 20% out: 0.19 m	Interpolated	No source
How far the tumpang sari’s opening closes from foot to top, as a share of the soko guru half-span. A share rather than a fixed step per tier: eleven tiers step more finely than three rather than closing further — and a stack with a fixed step runs out of opening before it runs out of count, and stops short of the standing it was meant to state.tumpangClose	0.62Moves no measurement	Interpolated	No source
Depth of a tumpang sari beam in section. Equal to the rise per tier, so the beams stack directly on one another: the short spacer blocks that really sit between tiers are not modelled, and leaving the gap they occupy would stand the stack on air — which the build-order check duly refuses.tumpangDepth	0.19 mMoves no measurement	Interpolated	No source
Width of a tumpang sari beam in section.tumpangWidth	0.11 mMoves no measurement	Interpolated	No source
Height of the molo above the top of the tumpang sari. The brunjung is steep, and it is the roof plane read from a distance.brunjungRise	2.90 mIf 20% out: 0.58 m	Interpolated	No source
Length of the molo as a share of the soko guru spacing — not of the length of the house, because the brunjung stands on the soko guru square and its ridge cannot be longer than what it stands on. A joglo molo is far shorter than its building; that is what makes it a hipped roof rather than a gabled one, and what makes it impossible to build by sweeping one section along a ridge.ridgeShare	0.50Moves no measurement	Interpolated	No source
How far the eave oversails the outer pillar line, so the drip falls clear of the pillar feet. How far the eave drops is not declared separately: the roof carries the penanggap pitch out to the edge, and that pitch is already set by the spacing and the height difference between the rings of pillars.eaveOversail	1.15 mIf 20% out: 0.23 m	Interpolated	No source
Reach of the emper, the extra low skirt outside the eave. Only the highest grade carries one, and it is that grade’s extra roof tier.emperRun	1.40 mMoves no measurement	Interpolated	No source
How far the emper falls below the main eave. Shallower than the penanggap, so the extra tier reads as a tier.emperDrop	0.42 mMoves no measurement	Interpolated	No source
Width of a rafter in section.rafterWidth	0.07 mMoves no measurement	Interpolated	No source
Depth of a rafter in section.rafterDepth	0.10 mMoves no measurement	Interpolated	No source
Number of rafters per roof plane.raftersPerSide	9Moves no measurement	Interpolated	No source
Radius of the molo, the ridge beam.moloRadius	0.09 mMoves no measurement	Interpolated	No source
Depth of the plate on each ring.plateDepth	0.20 mMoves no measurement	Interpolated	No source
Width of a plate.plateWidth	0.14 mMoves no measurement	Interpolated	No source
Exposed depth of one course of tiles.tileCourseDepth	0.26 mMoves no measurement	Interpolated	No source
How far a course of tiles stands proud of the one below it.tileThickness	0.04 mMoves no measurement	Interpolated	No source
The share of a course of tiles that the course above laps over.tileLap	0.35Moves no measurement	Interpolated	No source
Clearance between the battens and the first course of tiles.tileBedClearance	0.02 mMoves no measurement	Interpolated	No source
Side of the pendhapa, the open pavilion at the front.pendhapaSpan	6.40 mMoves no measurement	Interpolated	No source
The distance between the pendhapa and the dalem. The space between them is the pringgitan, where wayang is performed — the audience in the pendhapa, the screen between the two.pendhapaGap	2.40 mMoves no measurement	Interpolated	No source
Height of the pendhapa’s brunjung relative to the dalem’s. The pavilion stands lower than the house, and should: the place where guests are received does not overtop the place where the household lives.pendhapaBrunjung	0.70Moves no measurement	Interpolated	No source
The pendhapa’s soko guru spacing, as a share of its side.pendhapaGuruShare	0.42Moves no measurement	Interpolated	No source
Girth of a hip rafter relative to a common one.hipRafterGirth	0.75Moves no measurement	Interpolated	No source
How far the roof boarding sits above the rafter axis, as a share of rafter depth.sheathingOffset	0.50Moves no measurement	Interpolated	No source
Height of the pendhapa’s own soko guru.pendhapaHeight	3.00 mMoves no measurement	Interpolated	No source
Depth of a sunduk, the beam tying the pillar heads.sundukDepth	0.20 mIf 20% out: 0.04 m	Interpolated	No source
Width of a sunduk.sundukWidth	0.12 mMoves no measurement	Interpolated	No source
How far a pillar head runs up into the sunduk, as a share of the sunduk’s depth.purusRun	0.65Moves no measurement	Interpolated	No source
Depth of the dish in the umpak that the pillar foot seats into, as a share of stone height.sokoSeat	0.28Moves no measurement	Interpolated	No source
Depth of the tested joint engagement, as a share of the smaller member.jointEngagement	0.30Moves no measurement	Interpolated	No source
Width of one floor board.floorBoardWidth	0.24 mMoves no measurement	Interpolated	No source
Four soko guru carry the centre of the house, and the square between them is that centre.sokoGuruFour	4Moves no measurement	Canon	Prijotomo, J., Ideas and Forms of Javanese Architecture (Gadjah Mada University Press, Yogyakarta, 1984).
The tumpang sari has an odd number of tiers, and the count reads as standing.tumpangIsOdd	1Moves no measurement	Canon	Dakung, S., Arsitektur Tradisional Daerah Istimewa Yogyakarta (Departemen Pendidikan dan Kebudayaan, Jakarta).
The joglo comes as a named graded series, each grade adding a roof tier and a ring of pillars. The names are documented; how many tiers each name carries here is the author’s reading.gradedSeries	1.00Moves no measurement	Canon	Dakung, S., Arsitektur Tradisional Daerah Istimewa Yogyakarta (Departemen Pendidikan dan Kebudayaan, Jakarta).
Three senthong at the back of the dalem, and the middle one is left empty. The most meaningful room in this house is the one nobody occupies.senthongTengahEmpty	1Moves no measurement	Canon	Tjahjono, G., “Center and Duality in the Javanese Dwelling”, in Bourdier, J.-P. & AlSayyad, N. (eds), Dwellings, Settlements and Tradition (University Press of America, 1989).
This house divides from the centre outward, not from the ground upward. There is no underfloor and no three stacked worlds; there is a centre under the brunjung and a periphery under the penanggap.centreNotStack	1.00Moves no measurement	Canon	Tjahjono, G., “Center and Duality in the Javanese Dwelling”, in Bourdier, J.-P. & AlSayyad, N. (eds), Dwellings, Settlements and Tradition (University Press of America, 1989).
Pegged purus joints; the frame goes up without nails and comes apart again.noNails	1.00Moves no measurement	Canon	Frick, H., Pola Struktural dan Teknik Bangunan di Indonesia (Kanisius, Yogyakarta, 1997).
The roof is a stepped hip: the molo is shorter than the building, and four planes fall away to the eave.hipped	1.00Moves no measurement	Canon	Prijotomo, J., Ideas and Forms of Javanese Architecture (Gadjah Mada University Press, Yogyakarta, 1984).
The soko stand on umpak stones; they are not buried.seatedOnStone	1Moves no measurement	Canon	Frick, H., Pola Struktural dan Teknik Bangunan di Indonesia (Kanisius, Yogyakarta, 1997).
The omah stands inside a walled pekarangan, with the pendhapa in front and the yard between. A Javanese house is not an object in a field: it is the back of a yard entered from the front.walledYard	1Moves no measurement	Canon	Dakung, S., Arsitektur Tradisional Daerah Istimewa Yogyakarta (Departemen Pendidikan dan Kebudayaan, Jakarta).
Depth of the pekarangan from the front wall to the back of the house.pekaranganDepth	24.00 mMoves no measurement	Interpolated	No source
Height of the yard wall, with the entrance in the front. Low enough not to hide the house from outside; the height is the author’s.yardWallHeight	1.20 mMoves no measurement	Interpolated	No source
Thickness of that wall.yardWallThickness	0.22 mMoves no measurement	Interpolated	No source
Width of the entrance opening at the front of the yard.gateWidth	3.00 mMoves no measurement	Interpolated	No source
Width of the pekarangan.pekaranganWidth	20.00 mMoves no measurement	Interpolated	No source

Bibliography

prijotomo-1984 · reference
Prijotomo, J., Ideas and Forms of Javanese Architecture (Gadjah Mada University Press, Yogyakarta, 1984).
dakung-depdikbud · reference
Dakung, S., Arsitektur Tradisional Daerah Istimewa Yogyakarta (Departemen Pendidikan dan Kebudayaan, Jakarta).
frick-1997 · reference
Frick, H., Pola Struktural dan Teknik Bangunan di Indonesia (Kanisius, Yogyakarta, 1997).
tjahjono-1989 · ethnography
Tjahjono, G., “Center and Duality in the Javanese Dwelling”, in Bourdier, J.-P. & AlSayyad, N. (eds), Dwellings, Settlements and Tradition (University Press of America, 1989).

Which of these matters most

Nearly every dimension on this page is the author’s own. What the provenance bar does not say is whether that matters. Each row below is computed by rebuilding the house: one dimension is pushed 20%, and the house is measured to see how far it follows. Nothing is estimated — the figures are the difference between two runs of the generator.

1ringStep1.24 mbody depth
2guruSpan0.96 mbody depth
3guruHeight0.68 mridge height
4brunjungRise0.58 mridge height
5ringDrop0.43 meave height
6eaveOversail0.23 mroof reach
7tumpangRise0.19 mridge height
8umpakHeight0.08 mridge height

If only one dimension could be surveyed, this is the one. This is sensitivity, not uncertainty: it shows what moves, not how likely the value is to be wrong. The 20% is itself the author’s choice.

Invariants

There is no measured drawing yet, so correctness rests on structural truth. These checks fail the build.

pass
Bilateral symmetry about the centre plane, along the molo
3066 points; largest mirror deviation 0.00 mm.
pass
Every tenon contained in its mortise
58 pasak, takik and tumpu joints; every one engaged.
pass
No joint spans more than one stage
Every joint engages two parts from the same stage or from consecutive ones.
pass
Stage ordering, and nothing below ground
293 parts, every one bearing on something already standing or on the ground.
pass
Mesh integrity: indices, triangles, normals
744 triangles; indices in range, none degenerate, every normal unit length.
pass
The floor is a plinth, not a storey on stilts
Clearance under the floor 0.43 m — enough to lift the floor off the ground, not enough for anything to be under it.
pass
The molo is shorter than its house, and four planes fall away to the eave
A molo of 2.40 m over a house of 11.00 m — 78% shorter; its width is zero, so both ends are planes rather than gables.
pass
The roof rests on the rings of pillars rather than merely near them
3 rings of pillars → 4 tiers of roof; each sits on its beam within 0 mm.
pass
The tumpang sari closes inward and upward, an odd number of times
5 tiers, odd; the opening closes 1.19 m from foot to top, and rises 0.95 m.
pass
The senthong tengah is left empty
Nothing is inside it. The most meaningful room in this house is the one nobody occupies, and this check passes precisely by finding nothing.
pass
Four soko guru at the centre, and each ring outside them is shorter
Joglo sinom: 3 rings, 4 soko guru; height falls from 3.40 m to 1.84 m going outward.
pass
The pendhapa stands in front, separated by the pringgitan
17 parts; 2.40 m clear of the dalem — the space between them is the pringgitan, a room made of a gap rather than of walls.
pass
The eave oversails the outer pillar line
eave 6.65 m from the axis; outer pillar face 5.61 m; oversail 1.04 m.
pass
Tile courses lap with no bare strip; the molo is covered
55 courses over 9.13 m of slope; smallest lap 1.3%.
pass
Every part declares the dimensions it came from
293 parts, every one tagged. By least-sourced input: 0 measured, 0 canon, 293 interpolated.
skipped
Checked against a measured drawing of a real house
Skipped. No measured drawing has been wired in, so there is nothing to compare against. This check will not be made to pass by weakening it.

What a check is preventing

Ten green rows are not a reason to believe anything. So one check is run against a house built to break it, and what is printed below is that check’s own verdict rather than a description of it.

The tumpang sari’s tier count is the rank signal, and it is read by counting from underneath. What is interesting is how it breaks: nothing is set to zero and nothing collapses. The inset is widened, each tier closes further in than the last, and at some point the opening runs out before the count does — the stack shuts before it has made its fifth tier. A rule that cannot be carried out is a different failure from a rule being disobeyed, and it is the one this building is actually exposed to.

The house as built

pass5 / 5tiers built · tiers declared

5 tiers, odd; the opening closes 1.19 m from foot to top, and rises 0.95 m.

Rear prow raised to 1.24 m

fail4 / 5tiers built · tiers declared

4 tiers built, 5 declared

The second house is never rendered. It is built during the build, failed, and thrown away.

This bar moves as real surveys are wired in. That movement is the project's progress metric.