Spiral Staircase with Glass Steps, Zlín, Czech Republic

Customer Project

The goal was to design a spiral staircase with glass steps and railings spanning over 2 floors. With sophisticated anchoring details and helical stringers created from subtle rectangular hollow section, a light and elegant staircase was formed. The interior spiral staircase is located inside of the educational, training and rehabilitation center in the city of Zlín.

Structural Analysis Ing. Vítězslav Hapl
Ing. Jan Mařík, Ph.D.
Ing. Jan Seifert
KONSTAT s.r.o.
Architectural Design CUBE DESIGN s.r.o.
Construction STAIRS design s.r.o.

Model Parameters

Model

Structure

Looking from the structural point of view and excluding the rigidity of the reinforced concrete structure, the staircase can be separated into two parts –the 1st to 2nd floor portion and the 2nd to 3rd floor portion. The staircase supporting structure consists of internal and external helical stringers. The stringers are fixed to the landings (welded to the pre-built anchor elements) and to the 1st floor slab (anchored via Hilti adhesive anchors).

The stringers are made of welded closed hollow sections with recessed flanges. The upper flange recess creates a groove for mounting a glass railing, while the lower flange recess is purely an architectural element. The stair treads are made of laminated tempered glass.

The treads are attached to a cantilevered box section (1 inch wide x 1 inch deep) further welded to the stringer web at four locations. The glass tread is supported on the cantilevers by an elastic band and fastened with metric screws. Due to the rigidity of the step-stringer connection, the steps are considered in the computational model.

The inner and outer stringer railings are made of laminated tempered glass bent to the appropriate radius. The railing is inserted into the stringer groove, positioned by elastic spacers, and finally glued into the groove by a suitable elastic material. The railing is considered only as a load and therefore has no load-bearing function.

Model

Due to the above-mentioned staircase floor independence, only one part of the staircase is modeled. The stringers and anchor elements are modeled with plate elements, and the stair treads are modeled as members. To estimate the maximum glass step loading and to evaluate the steel stringer maximum loading, two different stiffness values were used for the glass step connection and the support cantilever. The restraint in the reinforced concrete slab is modeled with a nonlinear failure under tension, elastic support applied to the anchor element’s individual surfaces.

Project Location

Mladcová, Zlín

Keywords

Steel stringers Glass steps RFEM

Write Comment...

Write Comment...

  • Views 190x
  • Updated 15 January 2021

Contact us

Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.

+49 9673 9203 0

info@dlubal.com

Online Training | English

RFEM | Steel | USA

Online Training 16 February 2021 9:00 AM - 12:00 PM EST

Online Training | English

RFEM | Structural dynamics and earthquake design according to EC 8

Online Training 24 February 2021 8:30 AM - 12:30 PM CET

Online Training | English

Eurocode 3 | Steel structures according to DIN EN 1993-1-1

Online Training 18 March 2021 8:30 AM - 12:30 PM CET

Online Training | English

Eurocode 3 | Steel structures according to DIN EN 1993-1-1

Online Training 6 May 2021 8:30 AM - 12:30 PM

Online Training | English

RFEM | Structural dynamics and earthquake design according to EC 8

Online Training 2 June 2021 8:30 AM - 12:30 PM

Dlubal Info Day

Dlubal Info Day Online | 15 December 2020

Webinar 15 December 2020 9:00 AM - 4:00 PM CET

Stability Design in Steel Construction with RFEM and RSTAB

Stability Design in Steel Construction with RFEM and RSTAB

Webinar 1 December 2020 2:00 PM - 2:45 PM CET

NBC 2015 Modal Response Spectrum Analysis in RFEM

Webinar 30 September 2020 2:00 PM - 3:00 PM EST

Programmable COM Interface for RFEM/RSTAB

Programmable COM Interface for RFEM/RSTAB

Webinar 12 May 2020 3:00 PM - 3:45 PM

RFEM Dynamic Analysis
RF-DYNAM Pro - Natural Vibrations  5.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

Price of First License
1,030.00 USD