✦ Metalwork · Locksmithing

Your central-stringer stairs, right the first time

Tread, riser height, cut angles, stringer length — everything is calculated and checked (Blondel's rule, 21–45° angle) before you switch on the angle grinder. No more recalculating on a corner of the workbench, no more sheet metal wasted on a botched cut.

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No credit card required · Instant results, no sign-up

💡 Subscribe for the length of the job, then stop — no commitment, no software licence to pay year-round for three staircases a year.
Diagram of a central-stringer, quarter-turn staircase
Right-hand 1/4 turn — 14 steps
9
Tutorial steps
2
Export formats
2
Directions (left/right)
100%
Real time
Geometry

Quarter turn, left or right

One geometry, two directions — Limonade computes the stringer, the cheek plates and the spacers for each.

Right-hand quarter turn
Two flights, quarter turn to the right
Left-hand quarter turn
Two flights, quarter turn to the left
Landing-level / under-landing step
Fine-tuning of the top level
The method

The helical turn, no bending machine required

No laser cutting, no boilermaking workshop needed. The tutorial shows you how to build, yourself, the jig that replaces industrial tooling — with just an angle grinder, a welder and a drill, in your own workshop.

  • A home-made protractor to transfer the exact cut angle onto the stringer
  • The same tool also sets the cut height — no need for a second tool
  • Every jig dimension calculated automatically for your staircase
Home-made angle protractor Protractor, view with height adjustment
What you get

Fewer mistakes, less wasted sheet metal, more workshop time

From entering dimensions to cutting, Limonade saves you the back-and-forth between the drawing and the workbench.

📐

Real-time calculation

Tread, height, angle and stringer length recalculated on every change — no more calculator or spreadsheet.

✅

No bad surprises

Blondel's rule, 21–45° angle, 220–320mm tread — checked automatically before you cut anything.

🖥️

DXF export

Compatible with your CAD software or your cutting machine — no re-entering data.

📖

Fabrication tutorial

9 guided steps, dimensions overlaid directly on the illustration — as if a tradesman were looking over your shoulder.

📊

PDF plan

Print it for the workshop or send it to the client for approval before starting fabrication.

⏳

Pay for the length of the job

One job, one subscription — cancel in one click once the staircase is installed, no hassle.

Workflow

As simple as a fabrication drawing

1

Choose the type

Quarter turn, direction and final step.

2

Enter the dimensions

Width, height, flights, stringer — instant result.

3

Follow the tutorial

9 guided steps with the fabrication dimensions.

4

Export

PDF, DXF — ready for the workshop.

Pricing

One job, one subscription — then you stop

No commitment, cancel in one click as soon as the job is done. No card required to try it.

Free
€0/month
To explore and calculate
  • Unlimited designer
  • Basic tutorial (5 steps)
  • PDF export
  • My projects (saving)
  • DXF export
  • Full tutorial (9 steps)
Start for free
Recommended
Pro
€50excl. VAT/month/workshop
For the length of your job
  • Unlimited designer
  • PDF + DXF export
  • My projects (unlimited library)
  • Full tutorial (9 steps)
  • Cancel any time, in one click
Subscribe to Pro

🚚 Optional: rent the fabrication tools (protractors, jigs) with express delivery, so you can start the job without waiting. Request it from your account once subscribed.

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