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Tools for Civil 3D and AutoCAD

Faster Civil 3D work, from the first point to the last sheet.

Britech-C3D adds more than 400 commands to Civil 3D. The CAD Bridge lets your AI assistant read the drawing and, when you approve, build in it. Both come from Brigen Consulting, made by civil engineers for their own production work.

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Britech-C3D is free for 30 days. The CAD Bridge is free.

Britech-C3D comparing two alignments station by station, with coordinates, elevations and offsets in one table.
The CAD Bridge's prompt library: design a road, grade a pad, design a drainage run. The CAD Bridge's prompt library: design a road, grade a pad, design a drainage run.
  • 400+Britech-C3D commands
  • 7ribbon tabs, one for each kind of work
  • 2022–2027Civil 3D versions supported
  • 135CAD Bridge tools for your assistant

The tools

Two tools, one way of working

Use the commands for the work you repeat every day, and hand the assistant the work that takes many steps. Either one works on its own.

Britech-C3D

Civil 3D add-in

More than 400 commands on seven ribbon tabs: drafting, survey, site, design, annotation, output and parking.

  • Grading that updates as you work
  • Sheets laid out along an alignment or a site grid
  • Pipe networks edited as a spreadsheet
  • Parking lots laid out from their boundary

Civil 3D 2022 to 2027 · free for 30 days, then per seat

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CAD Bridge

AI assistants in AutoCAD and Civil 3D

Your AI assistant reads the drawing open in AutoCAD or Civil 3D, checks it against your criteria and, when you approve, builds in it.

  • Roads, pads, grading, drainage and sheets, each in one approved step
  • Design checks and engineering calculations
  • Every change approved in CAD, and undone with one UNDO
  • Runs on your computer: no open port, no telemetry

AutoCAD and Civil 3D 2023–2027 · free

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Together

How they fit into a day's work

  1. Draft and design with the ribbon

    Britech-C3D's commands take the clicks out of points, surfaces, profiles, pipes, labels and sheets.

  2. Ask the assistant

    Through the CAD Bridge, your assistant reads the drawing and the job's documents, checks the design and proposes the next step.

  3. Approve, then keep

    Each change waits for your approval in CAD, runs as one transaction and comes back with one UNDO.

Why AgentCivil

Built for production work

Made by civil engineers

Brigen Consulting's engineers build these tools for their own Civil 3D production work first.

Current with Civil 3D

Britech-C3D runs on Civil 3D 2022 to 2027, and updates itself when Civil 3D closes.

Your drawings stay with you

The CAD Bridge runs on your computer, opens no network port and sends no telemetry.

Nothing changes without you

Edit mode starts off, every change asks first, and the drawing is backed up before the first one.

Try Britech-C3D free for 30 days

Create an account, install the add-in and sign in from Civil 3D. Buy seats for your team when you are ready.

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