RC Rebar Placement, Now Automated.
BuilderHub-R automatically reads structural analysis data (ST-Bridge, SS7 CSV) or 2D CAD drawings, generates 3D rebar placement models, and automatically detects rebar clashes between members. What once took days of manual work is now handled automatically.
Made with a real project: a 7-storey residential building in Shimomeguro, Tokyo.
Proven by the Numbers
Real-world comparison data per junction (shikuchi). (Scale example: a 3×2-span, 10-story building with 132 junctions.)
| Metric | 2D CAD | BuilderHub-R | Revit |
|---|---|---|---|
| Review time per junction | ~4 hours | ~1 hour | ~8 hours+ |
| Total time, 132 junctions | ~528 hours | ~132 hours | — |
| Person-days | ~66 | ~16.5 | — |
※ Internal benchmark example for the Japanese market; actual results vary by project conditions. (Savings are even larger versus manual Revit work.)
Labor and time savings through automated modeling
Where These Numbers Come From
BH-R's time savings come from three layers of automation. Here's how each one cuts a specific part of the curve above.
Auto-generation — You Don't Start From Zero
Reads ST-Bridge, SS7 CSV or 2D CAD data and instantly auto-generates the 3D rebar model. The hours of manual modeling become an instant base model the moment data is imported.
→ The steep rising part of the curve
Auto-detection + Precision Editing — Breaking the Loop
Automatically detects clashes (marked with X) and resolves them by simply entering a move distance. Resolved areas turn gray automatically, so only remaining clashes need tracking. The cascading-error loop of 2D CAD disappears.
→ Most of the time gap comes from here
Auto-regeneration — Never Do the Same Work Twice
When moving rebar isn't enough, you must change beam width or rebar rows. Manual work means redrawing the model from scratch — but BH-R auto-regenerates it from a single parameter change.
→ Eliminating rework shortens the whole timeline
What BH-R automates
ST-Bridge · SS7 CSV Import
Reads ST-Bridge (.stb) and SS7 CSV exported by structural analysis software and brings in member and section data as-is.
3D Rebar Auto-generation
Automatically generates construction-ready 3D rebar models reflecting actual bar diameter, development length, cover, and splice positions.
Automatic Clash Detection
Automatically detects clashes between members (column-beam, beam-beam, wall-slab) and within members (rebar-rebar, rebar-steel).
Intelligent Editing
Move clashing bars by entering a distance, then re-run the clash check to confirm the clash is resolved.
Automatic Quantity Takeoff
When structural changes occur, rebar details and quantities are automatically recalculated.
IFC · SAT Export
Export to IFC to review the structure and rebar in other BIM software. SAT models, quantity reports and bar bending schedules can also be output; Revit conversion runs through BuilderHub-C.
Full Control, Even After Automation
Auto-generated rebar can be edited directly to match field conditions, and standards checks such as clear spacing follow your edits automatically.
Individual Bar Movement
Select and move individual rebar bars in parallel, specifying the exact move distance.
Automatic Spacing Check
Automatically checks clear spacing between bars during movement to prevent code violations.
Group Move & Length Edit
Move rebar groups and individually edit development vertical/horizontal lengths.
Curvature Editing
When rebar must be bent, specify the bending origin and the curvature radius is auto-calculated — and fully editable by the user.
Mechanical Development
Apply alternative development methods such as EG anchor plates and plate-nut systems.
Works on Every RC Member
From standard members — columns, beams, walls, slabs, foundations — to complex special geometries like junctions, exposed column bases, sloped slabs, and stairs.
| Standard | Column · Beam · Wall · Slab · Foundation |
|---|---|
| Special | Junction (shikuchi) · Exposed Column Base · Sloped Slab · Stairs |
From structural data and drawings to BH-R to Revit — one integrated workflow
Structural Model (ST-Bridge, SS7 CSV or 2D CAD)
BuilderHub-R Model
Automated rebar modeling per Japanese rebar standards
Revit Model (BIM model carrying rebar data)
From Modeling to Clash Checks, Quantities and Export
There are two ways to build the model: recognize member lists and floor plans, or import ST-Bridge or SS7 CSV. From there, automatic rebar placement, clash checks, quantity takeoff and IFC/Revit export follow in one flow.
An engine proven in the Japanese market.
Adopted in Japan
Deployed under paid license by Japanese general contractors and structural design firms
Proprietary Codebase
Rebar engine built entirely in-house — not assembled from third-party libraries
Built on Patented Technology
Built on three registered Korean patents licensed to us; BH-R core technology is patent pending.
Real-World Applications
Examples of member and rebar models created with BH-R, and their Revit-converted results.
Feature Screens
Joint (Shikuchi) Modeling
Exposed Column Base Modeling
Turn BuilderHub-R quantity sheets into your company’s structural data
BH Box is a web service that turns the quantity sheets BuilderHub-R produces into your company’s structural track record; you just drag and drop them. Compare revisions side by side in 3D whenever the design changes, and see where a new estimate sits against your company baseline. Free during the beta. Screens are shown in Japanese, the language of the service.
ST-Bridge · 2D CAD
Structural analysis data or drawings
BuilderHub-R
Auto rebar + quantity takeoff (JIS)
Quantity sheets + model
Per member ID · SAT
BH Box
Revision comparison · company records
Next estimate
Company baseline
↻ Every project you add makes the baseline more reliable
Changed members show up in color
Added in green, changed in orange, removed in red. Up to four revisions side by side. Changes where only the rebar moved and the shape stayed the same are flagged separately as rebar condition changes.
You can see how the quantities got to where they are
Concrete, formwork and rebar trends build up as charts for each revision, and the reason for each change is recorded with it. The quantity comparison used in client discussions exports straight to Word or PDF.
See at a glance whether this project runs heavy or light
Projects with the same building use and structural type are grouped automatically, showing the median (P50) and range (P10–P90) of rebar per floor area. You also see which members drive the gap and how much past design changes added to the rebar.
The numbers on screen become the report
Six reports, including the unit-rate review, quantity comparison and RC quantities by part, export to Word (.docx) or PDF. No retyping numbers; staff only fill in comments and signatures.
Original quantity sheets are never sent. They are read in the browser and only numeric records are stored. 3D models (SAT) are stored for team sharing when you are logged in.
Built for these users.
| Core Users | Adjacent Users |
|---|---|
| Japanese RC structural design firms | Korean structural engineers |
| Japanese general contractor structural teams | Construction company BIM teams |
| BIM specialist consultants | PRE-CON · Clash review teams |
BH-R is standalone software — it runs entirely on its own. No Revit or any other BIM authoring tool is required: BH-R generates the rebar model, runs clash checks, takes off quantities, and exports IFC and SAT all by itself.
System Requirements for BuilderHub-R
| Item | Minimum | Recommended |
|---|---|---|
| OS | Windows 10 64bit (version 1909 or later) | Windows 10 64bit (version 1909 or later) |
| CPU | Intel i-Series (i3 or higher) or equivalent AMD CPU | Intel i5 or i7, AMD Ryzen 5 or 7, etc. |
| Memory | 16GB | 32GB or more |
| Display | 1920×1080 (Full-HD) or higher | 2560×1440 (QHD) or higher |
| Graphics | Integrated/dedicated VGA supporting DX9+ or OpenGL | Geforce or Radeon with 4GB+ video memory |
| Disk Space | 5GB or more | 100GB or more |
※ If the system does not meet the recommended specifications, the software will run but performance may be limited.