Does it run inside SketchUp?

No, and it never claims to. Prefab Studio is a browser studio, not a plugin - the project has no Ruby and no .skp code in it at all. You design in a desktop browser (WebGPU where available, automatic WebGL fallback otherwise) and carry the building out as GLB, which any glTF-capable modeller or renderer will take.

What does the 20 dollars cover at version 0.1.0?

It is a suggested price on an alpha, not a shrink-wrapped licence: one payment, no subscription, and no account or activation layer wired into this build. The buildings you model and the GLB files you export are yours to use in your own commercial work; the studio itself is not for resale or redistribution. Because it is priced before the feature list is finished, updates across the 0.x line come with it.

Can I build from these numbers?

Treat it as pre-design, exactly as the footer says: a conceptual pre-design model, not a structural project. The section check is a simplified TS 11372 slenderness and utilization pass, so a licensed engineer still signs the real calculation and the takeoff is a budgeting figure, not a cutting list. The other 0.1.0 edges are worth knowing before you buy: the interface is Turkish only, the BOM preview and part of the viewport toolbar are still stubs, GLB is the only export, and the two automated tests are starter-template checks rather than engine tests.

IN THE LABRuns in your browser

Prefab StudioWithout Working Out Steel and Quantities by Hand: Drag the Slider, the Prefab and Its Take-Off Update Instantly

When the client says “make it a bit wider”, they see the new numbers right there. Every slider rebuilds the frame, trusses, purlins, cladding and foundation live — and recounts steel kg, panel m², screws and M16 anchors as you drag.

3.6-15 m x 4.8-24 m
3 truss types, auto-picked
Live steel kg + panel m²

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SketchUp extensions currently on the workbench.

Desktop browser - WebGPU preferred, automatic WebGL fallback shown as a viewport badge · GLB (glTF binary) is the only export in 0.1.0 · Not a SketchUp plugin - the project contains no Ruby and no .skp code · v0.1.0

Left: the job by hand. Right: the same job with the plugin.

Prefab Studio

Every feature, at a glance

What the plugin does for you, drawn rather than listed.

Drag a slider, the building follows

Width 3.6–15 m, length 4.8–24 m, walls 2.5–5.5 m: every drag rebuilds the frame, trusses, purlins, cladding and foundation.

The span picks the truss

Fink up to 6.5 m, Pratt up to 8 m, Howe beyond; past 9.5 m the roof switches to a prestressed C40 precast truss.

The load sizes the section

Enter the dead and live loads; a 60, 80 or 100 mm C, U or Sigma section appears with its slenderness and utilization, and the bolts follow.

Swap the shell with one switch

40–150 mm PUR sandwich panel or 8–30 mm Betopan on the walls, PIR, PUR or rock-wool roof panels, and a pitch anywhere from 5 to 35 degrees.

A take-off that keeps up

Steel kg, panel m², roof screws, M16 anchors laid out at 1.35 m and the truss count are recounted as you drag, so there is no recounting before a quote.

Spot the heat bridges, take it apart

Thermal mode shows where the profiles bridge heat; the exploded view and roof, wall, frame and foundation toggles open it up, then it leaves as GLB.

Workload test

99% less work with Prefab Studio

By handRe-modelling the frame, then recounting the takeoff

1 h 30 m

With Prefab StudioDrag the width slider; the takeoff follows

20 sec

99%

less time on this job

270×

faster

The time the same job takes by hand and with the plugin; the share and the speed-up are worked out from those two times.

01
Three Sliders, a Ready Building
Width, length, height. The stud grid, trusses, purlins, panels and slab rebuild themselves at every drag — 3.6–15 m by 4.8–24 m. No re-modelling the frame.
02
The Span Picks the Truss
Fink under 6.5 m, Pratt to 8 m, Howe above — and past 9.5 m a prestressed C40 precast truss. Section and bolts follow the load, so you never have to remember which truss goes where.
03
A Take-Off That Never Falls Behind
Steel kg, panel m², roof screws, M16 anchors at 1.35 m, truss count — recomputed on every drag. Export the lot as GLB. No recounting before you quote.

The technical bit

For the people who read the manual first.

Works with: Desktop browser - WebGPU preferred, automatic WebGL fallback shown as a viewport badge · GLB (glTF binary) is the only export in 0.1.0 · Not a SketchUp plugin - the project contains no Ruby and no .skp code
Version: v0.1.0
Interface languages: tr

Footprint 3.6-15 m wide by 4.8-24 m long, wall height 2.5-5.5 m; stud spacing 0.4-0.8 m and profile thickness 0.8-2.0 mm are sliders, not remodelling jobs.
The truss set follows the span: Fink up to 6.5 m, Pratt up to 8 m, Howe beyond it - or pick one by hand. Past 9.5 m the roof switches to a prestressed C40 precast trapezoidal truss.
The cold-formed section is decided for you: C, U or Sigma at 60 / 80 / 100 mm, with slenderness (limit lambda 75) and utilization on screen. U is promoted to C above 260 kg/m2 total load and to Sigma above 520, and M10 / M12 bolts follow the choice.
Loads are yours to set: dead 100-450 kg/m2, live 75-350 kg/m2. The panel cites TS 11372, EN 1993-1-3 and S320GD+Z galvanised steel.
Shell in one switch: 40-150 mm PUR sandwich panel or 8-30 mm Betopan on the walls; 40-120 mm roof panel filled with PIR, PUR or rock wool; pitch 5-35 degrees.
Z or C purlins at the spacing you choose, with the RYSB 4.8x19 roof-screw count that spacing implies.
Slab plus M16 chemical anchors, laid out automatically at 1.35 m centres.
The takeoff is not a report you run afterwards - steel kg, panel m2, screw count, anchor count and truss count are recounted on every drag.
Viewport tools: thermal mode (a custom GLSL heat map) for spotting profile thermal bridges, exploded view, roof / wall / frame / foundation toggles, 20-step undo-redo, and three presets - Mikro 24 m2, Aile 78 m2, Atolye 207 m2.
GLB out through GLTFExporter with the footprint stamped into the filename; the scene draws on WebGPU and falls back to WebGL by itself, with a badge in the viewport saying which one you got.

Still being built

Shipped, and what is next.

Shipped

Parametric engine live - roughly 2,200 lines of TypeScript across four files rebuild frame, trusses, purlins, cladding, slab and anchors on every slider move.
Automatic truss selection by span (Fink / Pratt / Howe), with the 9.5 m switch to a prestressed C40 precast trapezoidal truss.
Section decision with slenderness and utilization readout - C / U / Sigma at 60-100 mm - plus M10 / M12 bolt sizing.
Live quantity takeoff: steel kg, panel m2, screws, anchors and trusses, with three size presets to start from.
GLB export, thermal heat-map mode, exploded view, layer toggles, 20-step undo-redo and a WebGPU renderer with WebGL fallback.

English interface: every hardcoded Turkish string moves into a dictionary so the studio reads the same in both languages.
Finish the BOM preview and the stubbed viewport buttons, and let the takeoff leave the screen as a printable or CSV sheet.
Tests that cover the engine itself - span rules, section promotion, quantity maths - and a fabrication-side export (DXF) next to GLB.

Before you ask

No, and it never claims to. Prefab Studio is a browser studio, not a plugin - the project has no Ruby and no .skp code in it at all. You design in a desktop browser (WebGPU where available, automatic WebGL fallback otherwise) and carry the building out as GLB, which any glTF-capable modeller or renderer will take.
It is a suggested price on an alpha, not a shrink-wrapped licence: one payment, no subscription, and no account or activation layer wired into this build. The buildings you model and the GLB files you export are yours to use in your own commercial work; the studio itself is not for resale or redistribution. Because it is priced before the feature list is finished, updates across the 0.x line come with it.
Treat it as pre-design, exactly as the footer says: a conceptual pre-design model, not a structural project. The section check is a simplified TS 11372 slenderness and utilization pass, so a licensed engineer still signs the real calculation and the takeoff is a budgeting figure, not a cutting list. The other 0.1.0 edges are worth knowing before you buy: the interface is Turkish only, the BOM preview and part of the viewport toolbar are still stubs, GLB is the only export, and the two automated tests are starter-template checks rather than engine tests.