From field dimensions to a fabrication-ready barlist and shop drawing in seconds.
CNSTRUCT transforms field dimensions into accurate Caltrans-standard rebar barlists and shop drawings. Select the Caltrans structure you need to build, enter your project dimensions, and instantly generate a complete barlist with a shop drawing built to Caltrans standards.
- Every bar calculated, every step explained
- Implements Caltrans Standard Plans
- Fabrication-ready output
- Pipe Ø
- 36 in
- Wall height H
- 5'-0"
- Wall thickness T
- 10 in
- Earth cover
- 10 ft
| Mark | Size | Qty | Length | Bend | A | B | D |
|---|---|---|---|---|---|---|---|
| 500 | #5 | 18 | 6'-7" | 2 | 60" | 12" | |
| 501 | #5 | 24 | 8'-9" | 11 | 80" | 12" | 14" |
| #5 | 14 | 9'-4" | Str | ||||
| 400 | #4 | 12 | 4'-2" | 2 | 38" | 9" | |
| 502 | #5 | 16 | 5'-1" | 11 | 44" | 12" | 14" |
| 503 | #5 | 8 | 7'-0" | 2 | 66" | 12" |
Representative output. Every bar is calculated to the governing Caltrans standard plan, ready for fabrication and review.
Built on the Caltrans Standard Plans
Rebar detailing is time-consuming, complex, and highly dependent on manual calculations.
Minutes, not hours
Manually calculating bars, checking dimensions, and creating shop drawings can take hours. CNSTRUCT turns complex Caltrans structures into accurate barlists and shop drawings in minutes.
Small Mistakes, Big Consequences
Every dimension matters in rebar detailing. A small error in a bend, length, or quantity can create fabrication issues before the steel ever reaches the jobsite.
Experience That's Hard to Replace
Decades of detailing knowledge lives with experienced detailers. CNSTRUCT helps turn that expertise into a repeatable process that can scale beyond one person.
Hours of manual detailing, simplified into three steps.
Caltrans structures follow defined standards, tables, and formulas, but every project has unique field conditions. CNSTRUCT combines standard-plan requirements with your project dimensions to generate accurate barlists and shop drawings while checking for compliance along the way.
Select Your Structure
Choose the Caltrans standard structure you need to build. CNSTRUCT follows the applicable standard plans, tables, and detailing requirements specific to that structure.
Enter Your Project Dimensions
Input the field conditions unique to your project: heights, spans, wall thicknesses, openings, clearances, and other required parameters. CNSTRUCT guides your inputs with built-in checks, notes, and standard requirements.
Generate Your Barlist & Shop Drawing
CNSTRUCT applies Caltrans detailing rules to calculate bar sizes, quantities, cut lengths, bends, and dimensions. If a design condition falls outside standard requirements, CNSTRUCT identifies the issue, explains the conflict, and helps you continue with the correct information.
Every barlist is also a 3D model.
The engine that writes the barlist also places every bar in 3D. Spin the cage in your browser, stand it on the jobsite at full scale from a phone, or take the model into CAD. These are live models generated by CNSTRUCT. Drag one.
Spin the full cage
Every bar is placed at its true diameter with the concrete shown as a ghosted shell. The model comes from the same calculation as the barlist, so what you see is exactly what the list says, bar for bar.
Stand it on the jobsite in AR
Any run can mint a share link with a QR code. Scan it from a phone, stand where the structure goes, and see the cage at full scale before a yard of concrete is ordered. Links stay live for a week, so you can text one ahead to the crew.
Take it straight to CAD
Download the placed model as DXF or IFC with one layer per bar mark, ready for AutoCAD, DesignCAD, or your BIM workflow. Isometric fold views ship on the shop drawing as well.
27 structure types, and growing.
Each structure follows its governing Caltrans standard plan, with the tables and detailing requirements built in. New structures are added the same way.
supported templates
- Straight HeadwallD89A / D89B
- L HeadwallD89A / D89B
- Junction StructureD91A / D91B
- Box CulvertD80
- Double Box CulvertD81
- Box Culvert Wingwall (Types A-E)D84 / D85
- Retaining Wall Type 1B3-1A / B3-1B / B3-1C
- G Inlet (G1 / G3 / G4 / G5 / G6)D72B / D72C
- G2 InletD72B / D72C
- G2 Expanded InletD72B / D72C
- G2 Inlet Top (replacement)D72B / D72C
- G2 Expanded Inlet Top (replacement)D72B / D72C
- GT1 InletD72D / D73D
- GT2 InletD72D / D73D
- GT3 InletD72D / D73D
- GT4 InletD72D / D73D
- GO InletD72E
- GDO InletD72E
- OS InletD72A
- OL InletD72A
- GOL InletD72A
- Concrete Pipe CollarGeneral
- Pipe EncasementGeneral
- Flat SlabGeneral
- Slab on GradeGeneral
- Circular CageGeneral
- Rectangular CageGeneral
Caltrans rebar detailing, ready for fabrication.
Seconds, Not Hours
Enter your structure dimensions and generate a complete barlist and shop drawing in seconds. CNSTRUCT automates the manual calculations, allowing detailers to spend more time reviewing the final output instead of building every bar from scratch.
Built on Standard Plans
Each structure follows the applicable Caltrans standard plans, tables, and detailing requirements. CNSTRUCT applies the required calculations for bar dimensions, spacing, lap lengths, and bend requirements through a consistent standards-based engine.
Complete Fabrication-Ready Output
Generate detailed barlists and shop drawings with bar marks, sizes, quantities, cut lengths, bend types, and leg dimensions. Export your completed details into the formats your team needs for fabrication and review.
Built by People Who Detail, Fabricate, and Place Rebar
CNSTRUCT was developed from 57 years of real-world reinforcing steel experience at Vista Steel. Our standards-based engine is built from decades of detailing, fabrication, and field installation knowledge, ensuring the output is not only calculated correctly, but practical to fabricate and place.
Every barlist is created with an understanding of how reinforcing steel moves from the drawing, to the shop, to the jobsite. CNSTRUCT combines Caltrans standards with hands-on industry experience to generate rebar details that work in the real world.
What CNSTRUCT is built on.
Precise
Produce fabrication-ready barlists and shop drawings driven by structured engineering rules.
Educational
The software doesn't simply produce barlists: it develops users into knowledgeable Caltrans rebar detailers by explaining the reasoning behind every reinforcement decision.
Accessible
Enable contractors, estimators, and new detailers to create professional rebar details without prior detailing experience.
Building the foundation for intelligent rebar detailing.
Every cast-in-place concrete structure requires accurate rebar detailing before it can be fabricated and built. Today, much of this knowledge lives inside manual calculations, spreadsheets, and years of specialized detailing experience.
CNSTRUCT converts rebar knowledge into structured software, starting with Caltrans standard structures as the foundation. By combining engineering requirements, historical detailing data, and real fabrication experience, CNSTRUCT is building the calculation framework needed to automate complex rebar detailing.
Caltrans Standard Structures
27 structure templates, live in a subscription web app
Structure parameters → barlist & shop drawing generation
3D models, on-site AR placement, and CAD export (DXF / IFC)
Contractor order intake, cut planning, and an AI assistant grounded in the engine
Expanded Structure Library
Building calculation models beyond standard plans using historical detailing data and common reinforced concrete structures such as foundations, grade beams, walls, slabs, and custom details.
Intelligent Plan Automation
Plan intake → structure recognition → calculated output
A complete detailing system built on structured data and proven calculation logic. CNSTRUCT does not guess from drawings: it understands project requirements, applies detailing rules, and generates accurate barlists and shop drawings through a reliable calculation engine. Before a structure ships, its output is checked bar for bar against barlists produced by working fabricators.
Investing, partnering, or piloting CNSTRUCT on a project?
Request the investor deckGet early access to CNSTRUCT.
Be one of the first teams on CNSTRUCT. Sign up, enter your project dimensions, and generate Caltrans-standard barlists and shop drawings right in your browser.
Caltrans-standard barlists & shop drawings · built by Vista Steel