Multi-Material Home Stairway (Wood, Steel and Glass)
The efficient combination of wood, steel and glass composing this stairway, fashioned by the YLEx design office, provides a soothing perspective of lightness.
|Design and Production||
Glass Staircase Model Parameters
In this project, the first 3 glass steps are rooted into the floor, followed by 1 landing step and 15 crash glass steps fixed on the outside by stainless steel brackets both to the lateral wall and to a metal rack. The steps are suspended on the inside through stainless steel tube tie rods from a glued-laminated timber stringer, which is anchored both at the top and bottom to glued-laminated timber poles. The curved glued-laminated timber stringer also acts as a handrail.
The design was performed by the YLEx engineering office using the FEA software RFEM. The overall study of the stairway considers the orthotropic behavior of the timber, the stiffness of the glass as well as the isotropic behavior of the steel. The modeling of the curved glued -laminated timber stringer was able to be generated through an orthotropic quadrangle surface with a 2D elastic orthotropic material property. The stiffness of the glass was managed by defining its composition in the RF-GLASS module.
This module was operated for the calculation and design of the glass steps. The forces taken into account for the dimensioning of both the steps and the complete stairway abide by the Eurocode standards as well as their French national annexes. The designed forces taken over by the stringer towards the stainless steel tie rods have efficiently eased the dimensioning of the inserts screwed into the timber. A vibration study was also performed, which demonstrated a higher frequency than the originally recommended one in order to ensure an acceptable operating standing.
Project LocationAntibes, France
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RF-/HOHLPROF add-on module for RFEM/RSTAB | Ultimate limit state designs of welded hollow section connections according to EC 3
RFEM add-on module RF-LOAD-HISTORY | Consideration of plastic deformations from previous load conditions
RFEM/RSTAB add-on module RF-/STEEL BS | Design of steel members according to BS 5950 or BS EN 1993-1-1
RFEM/RSTAB add-on module RF-/JOINTS Steel-DSTV | Standardized connections in steel buildings according to EC 3
RFEM/RSTAB add-on module RF-/TIMBER CSA | Design of members made of timber according to CSA 086 (Canadian standard)
RFEM/RSTAB add-on module RF-/FE-LTB | Lateral -torsional buckling analysis according to theory II. Order (FEM)
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
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