Wendeltreppe Lilienthalhaus Braunschweig

Spiral staircase in Braunschweig

Expressive spiral staircase at the Lilienthalhaus

In the publicly accessible atrium, the spiral staircase elegantly connects the four levels of the building.

Project description

Spiral staircase at the Lilienthalhaus

In the Braunschweig airport district, directly at the Lilienthalplatz, the “Lilienthalhaus I” was finished in 2017 after a construction period of only 16 months. The central visitor and service centre for aerospace and mobility is excellently located between the A2 motorway and Braunschweig airport. On four storeys, the futuristic-looking building accommodates flexible office spaces, a divisible event room and a team bistro on an surface of approx. 5,000 m². The sky lounge offers an impressive view over the entire research airport.

Eye-catcher in the atrium

The eye-catcher in the publicly accessible atrium is the self-supporting spiral staircase that stylishly connects the four levels of the building. It is the elliptical shape of this expressive staircase with folded steps that catches the visitor’s attention. The floor plan was particularly challenging for the production process. In order to achieve an even radius, the entire realisation of the steel construction had to be very precise. However, the MetallArt experts managed the job excellently. A tread step cover made of Jura limestone completes the modern design of the spiral staircase and blends harmoniously into the ambience of the bright atrium.

Lilienthalhaus Braunschweig Wendeltreppe
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Project details
Spiral staircase made of steel
  • Ellipsoid rounded spiral staircase
  • Flat-steel balustrade stringers on both sides
  • Folded tread steps welded in between the stringers, bent downwards at the front and welded at the rear
  • Effective flight width of the spiral staircase approx. 1,700 mm
  • Stringer height up to approx. 1,620 mm, stringer thickness 15 mm
  • Intermediate and exit landings on each level

Stainless steel handrail with bottom belt

The elegant both-sided handrail of the spiral staircase consists of a stainless steel round tube on the inside. It is attached by means of stainlesss steel round bars to a horizontal flat-steel bottom belt which was welded to the balustrade stringers.

Challenging assembly of the spiral staircase

MetallArt delivered the spiral staircase in nine partial segments to the construction site, divided in three elements per floor. Each component had a weight of approx. 1,8 t. Due to the large size of the single components considerable time savings during the installation were possible. The complex planning regarding the welding sequences was realised in advance and guaranteed the even height distribution during the welding processes on the spiral staircase.

In addition to the delivery and assembly of the spiral staircase MetallArt was also responsible for the complete construction and factory planning.