The PORTOFINO spiral staircase prioritises climbing comfort over purely visual effect. Its powder-coated steel steps feature a slightly rough surface that reduces the risk of slipping, both going up and coming down. Combined with a stable frame and vertical balusters, the overall structure provides reassuring support throughout the climb.
Available in three diameters (120, 140 or 160 cm), this model adapts to spaces of different sizes. In terms of finishes, three powder-coated colours are offered: black for a bold contrast in the room, grey or white for a more discreet integration. A continuous PVC handrail runs the full length of the climb, providing a constant grip from the first to the last support — a comfort feature appreciated in everyday use.
The metal parts are powder-coated by Minka in Austria, giving them good resistance to scratches, abrasion and wear over time. Like all Minka spiral staircases, the PORTOFINO can be installed with either a left-hand or right-hand rotation to suit the layout of your space.
Main characteristics
| Characteristic |
Ø120 cm |
Ø140 cm |
Ø160 cm |
| Outer radius |
600 mm |
700 mm |
800 mm |
| Minimum ceiling opening |
1300 x 1300 mm |
1500 x 1500 mm |
1700 x 1700 mm |
| Maximum floor height (standard) |
3003 mm (identical for all three diameters) |
| Step depth (going) |
210 mm |
236 mm |
244 mm |
| Step height (adjustable) |
210–231 mm |
| Clear passage width |
486 mm |
586 mm |
686 mm |
| Rotation per step |
29° |
25° |
22° |
| Landing width |
650 mm |
750 mm |
850 mm |
| Number of steps |
12 steps (11 steps plus 1 landing step) |
| Steps |
Powder-coated metal, slightly rough surface, 12 mm thickness |
| Available finishes |
Black, grey or white (powder-coated steel) |
| Central column |
Powder-coated steel Ø108 mm |
| Balusters |
Powder-coated steel Ø22 mm |
| Barrier height |
1000 mm |
| Handrail |
Continuous PVC Ø40 mm, matching (black, grey, white) |
| Rotation direction |
Reversible, left or right |
| Weight |
204 kg |
240 kg |
246 kg |
| Manufacture |
Austria (Minka), factory pre-assembled |
Height extensions on order
On order, up to two additional steps can be added to increase the maximum floor height. Standard configuration: maximum height 3003 mm. With one extension: 3234 mm. With two extensions: 3465 mm. This option applies to all three diameters.
Key features
- ✓ Anti-slip steps: Slightly rough surface, enhanced safety going up and coming down
- ✓ Adjustable step height 210–231 mm: Precise adjustment across 12 steps to match your floor-to-floor height
- ✓ Continuous PVC handrail: Constant grip throughout the climb, increased comfort
- ✓ Three diameters available: 120, 140 or 160 cm to suit your space
- ✓ Extensions available: Up to 2 additional steps on order to reach 3465 mm
- ✓ Three finishes: Black for a bold contrast, grey or white for a more discreet integration
- ✓ Reversible left or right: Installation adapted to the layout of your room
- ✓ Robust structure: Powder-coated steel, resistant to scratches and abrasion
Installation advice
Before ordering, essential measurements: Identify the diameter suited to your ceiling opening. Minimum required according to diameter: 1300 x 1300 mm for Ø120, 1500 x 1500 mm for Ø140, 1700 x 1700 mm for Ø160. Also note your exact floor-to-floor height, from finished floor below to finished floor above.
Determining step height: With 12 steps, your exact floor-to-floor height will determine the optimal step height between 210 and 231 mm. If your ceiling exceeds 3003 mm, indicate this when ordering to benefit from one or two extensions, up to 3465 mm.
Choice of rotation direction: Specify when ordering whether you want a left-hand or right-hand rotation, based on the position of your stairwell opening and the desired orientation of the top landing. This choice is final after manufacture.
Site preparation and assembly: Flat and stable floor support, solid ceiling anchor for the central column. Minimum 2 m² access at the base for receiving the modules. The staircase arrives pre-assembled in sections: positioning the column, stacking the steps, securing at both support points, fitting the continuous handrail. Estimated time: 4 to 6 hours with two fitters depending on the chosen diameter.
Maintenance and protection
Steps and metal structure: Wipe once a month with a dry cloth or a slightly damp cloth in humid environments. The powder coating provides long-lasting protection against corrosion. Check annually for any paint chips that may expose bare steel.
Anti-slip surface: Clean with neutral soapy water, without any abrasive product that could wear down the surface texture.
PVC handrail: Clean with soapy water, without abrasives. PVC requires no special treatment and retains its colour over time.
Lifespan: With regular maintenance, the PORTOFINO staircase retains its functional and aesthetic qualities for a minimum of 15 to 20 years in residential use.
Frequently asked questions
Are the metal steps slippery?
No. Each step has a slightly rough surface designed to reduce the risk of slipping, both going up and coming down. This anti-slip finish requires no additional treatment after installation.
Does the handrail cover the full climb?
Yes. The PVC handrail is continuous from the first to the last support, providing a constant grip throughout the climb, with no interruption between two steps.
Which diameter should I choose for my space?
The Ø120 cm is suited to confined spaces with a minimum opening of 1300 x 1300 mm. The Ø140 cm offers a more comfortable passage with 1500 x 1500 mm. The Ø160 cm, for 1700 x 1700 mm, reduces the rotation per step and improves climbing comfort where space allows.
Can the standard height of 3003 mm be exceeded?
Yes, on order. One extension brings the maximum height to 3234 mm. Two extensions allow a height of 3465 mm to be reached. This option is available for all three diameters.
What regular maintenance is required for the metal structure?
A monthly wipe with a dry cloth is sufficient in most cases. In humid environments, a slightly damp cloth is recommended. The powder coating provides long-lasting protection for the structure without requiring any particular annual treatment, except in the event of a visible chip.
Can the PORTOFINO be installed with either a left-hand or right-hand rotation?
Yes. The PORTOFINO is reversible: please specify your preference when ordering, based on the layout of your room and the desired orientation of the top landing. This choice must be confirmed before manufacture, as it becomes final once the staircase has been produced.
What colours are available for the PORTOFINO?
Three powder-coated finishes: black for a bold contrast in the room, grey or white for a more discreet integration to suit your décor.
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