Stahltreppe mit Handlauf

Steel stairs with glass treads at Vector

Transparent glass treads

It is a perfect combination of bent box-type stringers, transparent glass treads and an exclusive stainless steel railing.

Project description

Design in glass and steel

The impressive steel stairs with transparent glass treads covers three storeys in the Vector corporate building in Stuttgart. It is a perfect combination of bent box-type stringers, transparent glass treads and an exclusive stainless steel railing. The overall screen printing on the tread surface prevents slipping and ensures a good foothold.

Design for steel stairs with glass treads

  • Box-type stringers welded from H-profiles
  • Steel treads welded between the box-type stringers
  • With a steel base plate fixed to the unfinished floor
Stahl Handlauf
Project details

Ground plan for steel stairs:

  • Three-flight, evenly curved, with two half-landings
  • 62 risers, 59 treads and a stairs’ head landing
  • Flight width up to 1,100 mm

Tread supporting structure for steel stairs

  • Consists of two rectangular tubes welded between the stringers
  • Flat steel sections with stainless steel edge protection welded to the inner stringer surface to ensure the support of the glass treads on fours sides

Tread cover for steel stairs

  • Glass treads made of three-layer laminated safety glass
  • Top layer made of tempered safety glass with all-over anti-slip screen printing in matt white

Stainless steel railing in MAT design

  • Technically sophisticated structure with an appealing high-quality look; it dispenses almost completely with weld connections
  • Double flat stainless steel balusters, accurately milled in the centre to hold the horizontal filling bars; bottom even and top side with a bevel cut of 30°
  • Flat steel brackets as baluster supports with screw connections
  • Handrail made of stainless steel circular tubes, diameter of 42 mm
  • Handrail supports made of stainless steel round bars of 12 mm and flat steel brackets screwed to the balusters
  • Balustrade filling of horizontal stainless steel round bars, running horizontally parallel to the stairs’ flight inclination and fixed by clamping

In addition to the delivery and assembly of this exclusive steel stairs structure, we were also responsible for the following tasks in this project:

  • Verifiable structural calculation of the steel stairs
  • Verifiable structural calculation of the railing
  • Verification of the resistance to vibration


Kohlbecker Gesamtplan GmbH, Gaggenau