Sculpturally shaped flat-steel stringer staircase | COMCENTER

2021, Erfurt

In the newly opened COMCENTER in Erfurt, the double-flight flat steel stringer staircase impresses as a custom-made design object.

COMCENTER celebrates comeback

As an attractive business location, the COMCENTER operated by Landesentwicklungsgesellschaft Thüringen mbH reopened its doors in summer 2022 after an extensive modernization phase. Contemporary and equipped with state-of-the-art technology, the event building is centrally located in Erfurt's Brühl district and offers professional conference and meeting facilities for digital, hybrid and analog events. Versatile equipment, acoustic walls and creative furniture enable open and variable working formats for up to 180 people in a comfortable atmosphere. LEG Thüringen, whose headquarters are directly adjacent, is responsible for business development and real estate management in the Free State of Thuringia and is committed to the further development of the investment and technology location.

Flat-steel stringer staircase for high-tech location

With its dominant character, the cantilevered flat steel stringer staircase connects the basement with the first floor of the conference and congress center, where trade fairs can be aligned alongside workshops, meetings and conferences. The interior design contrasts raw concrete and plain surfaces with black steel, wood and colorful accents. As a sculptural installation, the flat steel stringer staircase with rounded intermediate landing meets the existing spatial situation of the 20-year-old original administration building and sets strong accents with its design and materials. On the first floor, a ceiling parapet was designed to match the black flat steel stringers as a lining for the pulpit, which is part of the DenkDeck designed as a co-working space.


Project details

  • flat steel stringer staircase with two straight flights, basement - ground floor
  • self-supporting design, parapet-high flat steel stringers on both sides
  • 9 or 8 risers per flight of stairs
  • curved intermediate landing welded to the stringers, outside/inside radius: 1,500 mm/1,200 mm
  • support: at the entrance and exit via steel grating/steel girder, anchored in reinforced concrete ceiling
  • stair head landing made of flat steel with stair stringers continuing on two sides
  • all weld seams on the inside of the flat steel stringer staircase
  • weight of upper flight of stairs + stair head landing: approx. 1,900 kg, intermediate landing: approx. 1,400 kg, lower flight of stairs approx. 1,700 kg
  • on-site wood cladding on the steps and inside of the stringers

  • flat steel treads as a folding structure/box construction with treads and risers
  • welded between the stringers, construction height approx. 60 mm (according to static requirements)
  • edged upwards at the back, welded to the tread plate at the front with overhang
  • top cover plate welded in at a distance from the top edge
  • cavity insulated with mineral wool

  • three-sided flat steel cladding of the "pulpit", 1,450 x 15 mm
  • filled, ground and with anti-corrosion coating for opaque painting
  • concealed fastening, with adhesive anchor in reinforced concrete ceiling according to stat. calculations

METALLART also undertook the verifiable structural analysis services for the flat steel stringer staircase as well as the preparation of the vibration analysis.


VITAMINOFFICE ARCHITEKTEN Bastam Enenkel Partnerschaft mbB, Erfurt

More projects

Modern stringer stairs | Post Luxembourg
Folded stairs in the LAMAISON hotel in Saarlouis
The personal data you provide will be processed exclusively for the purpose of handling your request. Further information can be found in our privacy policy.