Impressive eye-catcher

2011, Bonn

We construct central stringer stairs for you as central stringer stairs or with an external support rail.

Central stringer stairs | Construction

The supporting stringer is usually made of round tubes (steel or stainless steel). However, stringer constructions made of rectangular tubes or triangular stringers also make for an impressive appearance.

Regardless of whether you prefer wood, stone or glass as a step covering - central stringer stairs are an eye-catcher in any combination and are suitable for all linings. A successful contrast is provided by designs in which the strength of the stringer is set off by the lightness of glass. Light-colored woods also form a perfect contrast to the dominant steel stringer.

Single stringer stairs

As the name suggests, the supporting structure of single stringer staircases consists of just one stringer. Thanks to this design, they are always an impressive eye-catcher in the middle of living spaces or in modern stairwells. Single stringer staircases fit into any living scene like a sculpture as a design element. This appearance is particularly characterized by a step construction, especially the risers.

Central stringer stairs | Construction

The supporting stringer is usually made of round tube (steel or stainless steel). However, stringer constructions made of rectangular tubing or triangular stringers also make for an impressive appearance.

Regardless of whether you prefer wood, stone or glass as a step covering - central stringer stairs are an eye-catcher in any combination and are suitable for all linings. A successful contrast is provided by designs in which the strength of the stringer is set off by the lightness of glass. Light-colored woods also form a perfect contrast to the dominant steel stringer.

Single stringer stairs

As the name suggests, the supporting structure of single stringer staircases consists of just one stringer. Thanks to this design, they are always an impressive eye-catcher in the middle of living spaces or in modern stairwells. Single stringer staircases fit into any living scene like a sculpture as a design element. This appearance is particularly characterized by a step construction, especially the risers.

Single-stringer staircase for modern living

This staircase in a residential building in Bonn demonstrates the contrast between lightness and strength. The steel staircase was fixed to the unfinished floor with steel floor plates using a load-bearing central spar made from a welded rectangular tube. The METALLART experts executed the single-stringer staircase in accordance with DIN 18065 and with steel treads welded onto the stringer.

Design in glass and steel

The staircase layout is straight at the entrance and exit, and the single stringer staircase is evenly rounded in between. The flight width is up to approx. 900 mm. Matt white glass treads with an all-over screen-printed surface were used for slip resistance. The stair railing consists of double flat steel posts and a stainless steel handrail. Horizontal stainless steel round bars serve as railing infill.

Insights

Project details

  • with load-bearing central rail made of welded rectangular tube
  • steel treads welded onto the rail
  • with steel base plate fixed to unfinished floor
  • Design in accordance with DIN 18065
  • Staircase layout straight at the entrance and exit, evenly rounded in between
  • Flight width up to 900 mm, 32 risers

  • Angled frame made of 5 mm thick sheet steel
  • tread surface cut out to an edge of 4 cm
  • chamfered downwards at the front and back
  • Step height according to static requirements

  • 24 mm thick laminated safety glass panes (laminated safety glass) plus film thickness
  • Top side with matt white full-surface screen printing for slip resistance
  • Edges ground after lamination

  • Railing post as double flat steel post, milled exactly in the middle of the filler rod penetration
  • Post holder made of flat steel bracket, screwed to post
  • Handrail bracket made of stainless steel round bar
  • Handrail made of stainless steel round tube
  • Railing infill made of 5 horizontal stainless steel round bars, coiled to match the staircase, clamped to the front of the railing post with grub screws

Due to the design, proof of suitability for welding stainless steels and proof of suitability for welding steel/stainless steel joints is required.

All steel parts made of St 37-2, scale-free, bright material, all visible weld seams ground, surface primed for corrosion protection and finished in DB 703.

All stainless steel parts material number 1.4301, surface ground 320 grit (uniform grinding pattern)

Architecture

More projects

Spiral stairs in the PANEUM in Asten
Ellipsoidal steel staircase | Max Mara in Vienna
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