Escaliers intérieurs

LOGI: the design staircase that combines comfort and safety

A central stringer staircase to structure your interior

The LOGI staircase is a straight interior staircase with a central steel stringer designed for spaces where the stair becomes part of the architecture. The central spine supports all the treads and keeps the sides open, letting light pass through and keeping the room visually clear. LOGI fits naturally into large living areas, entrance halls or mezzanines where you want a clean connection between two floors without adding visual bulk.

Comfortable and reassuring for everyday use

With LOGI, comfort and safety come first. The option of adding intermediate landings makes the ascent smoother and less tiring, while reinforcing the feeling of security. The rigid steel structure combined with wooden treads gives a pleasant step and makes this model suitable for intensive daily use, whether as a main stair in a family home, an office or an open interior staircase that is used all day long.

More information? Download LOGI - Technical sheet

Starting from :4 250 € Excluding VAT

Price for a standard straight staircase for one storey, including the handrail and beechwood treads, excluding installation

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Why choose the LOGI staircase?

A central steel spine for stability and openness

At the heart of LOGI is a central steel stringer that carries the whole staircase. Welded tread supports fix each step to this spine, ensuring a robust and durable construction. This layout offers:

high structural stability,
open sides without a heavy closed riser,
a clean, minimal line that works in contemporary interiors.
The stair feels light in the space while remaining reliable, even in areas with a lot of traffic.

Warm wooden treads for a tailored look

LOGI always features wooden treads, bringing warmth and a comfortable feel underfoot. By choosing the timber species and finish, the staircase can be aligned with the floor, joinery or furniture. Typical uses include:

a living room staircase as a visible feature,
access to a mezzanine or upper level,
replacing a heavy closed stair with a lighter, open model.
The mix of steel and wood creates a timeless staircase that will not quickly go out of style.

Stair Treads and Finishes: All Our Options

Everyday comfort and a strong sense of safety

Thanks to its stable structure and the possibility of intermediate landings, the LOGI staircase feels safe and comfortable for all users. The combination of a stiff steel structure with wooden treads limits vibration and increases confidence when going up and down. This makes it a good choice for:

homes with frequent stair use,
projects needing a reliable main staircase,
interiors where a comfortable, reassuring stair is preferred over a purely decorative object.

Custom-made and installed by Spira

Every LOGI staircase is custom-designed and manufactured in Belgium and installed by Spira’s teams. The simple yet well-thought-out concept around a central stringer simplifies installation and helps control production costs without sacrificing quality. Key benefits include:

precise fit within the available space,
a single partner for design, production and installation,
a durable interior steel-and-wood staircase that pairs easily with many design styles.
For anyone seeking a straight central stringer staircase that combines clarity of line, comfort and a manageable budget, LOGI is a highly relevant solution.