Project Description

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Project description

Stringer staircase at EVF

The administration building of Energieversorgung Filstal (EVF) in Göppingen, which was completed in 2020, appeals with its cubic, clear look. Its floor-to-ceiling glazing conveys openness and transparency. Inside, the building accommodates not only offices and seminar rooms but also a modern customer center, exhibition areas and a training kitchen. The design comes from the renowned architectural firm blocher partners from Stuttgart.

Stringer staircase as unique eye-catcher

The sculptural, evenly rounded stringer staircase by MetallArt highlights the inviting new building and connects the ground floor with the upper floor. In the superior area of the inner and outer balustrade stringers the MetallArt experts installed a modern light cove which was finished on-site with an LED strip. This element illuminates the 24 steps of the impressive single-flight stringer staircase and creates an atmospheric appearance. On the bottom the entire light cove opening is only approx. 25 mm. On the outer stringer, a rectangular handrail made of European oak contrasts harmoniously with the black lacquered parapet-high railing. The layered gluing of the wooden handrail guarantees the greatest possible stability.

Göppingen Wangentreppe
Project details

Technical details of the stringer staircase

  • Diameter inner stringer: 900 mm
  • Diameter outer stringer: 4,100 mm
  • Effective flight width: up to 1,440 mm
  • Stainless steel tread edge protection
  • Tread step construction: combined folded/box-type trough steps
  • Risers: 25 pc
  • Landing: 1 pc stair head landing with a surface of approx. 4-5 treads
  • Stringer thickness: approx. 15 – 20 mm or according to structural requirements
  • Stringer height: approx 1,400 – 1,450 mm

All-glass railing for the gallery

For the upper floor, the MetallArt specialists created an all-glass railing made of laminated safety glass and tempered glass panes. It was inserted into a bottom flat steel frame. This railing solution convinces with maximum transparency and provides for a light-flooded interior design. Analogous to the handrail of the stringer staircase, the wooden handrail of the all-glass railing is also made of noble “European oak”. It was attached and glued to the top.

Steel sheet soffit for stringer staircase

  • Structurally supporting smooth underside cladding made of steel sheet
  • Flush welded steel plates between the stringers on the bottom side, exactly according to the stairs run
  • Significantly improved statics and optimized vibration behaviour of the stringer staircase
  • For guaranteed prevention of cracking:
    • no plasterboard claddings
    • no all-over re-plastering or filling and
    • no acrylic joints towards the stairs stringers

Calculation and production

  • of a verifiable structural analysis of the stringer staircase and the glass railing
  • of a vibration verification for the sculptural staircase