Naikoon’s Global Headquarters CLT Staircase Vancouver, BC Canada
Naikoon Contracting Ltd. announced their new global headquarters location in Vancouver, BC late 2018 with a grand opening in Spring 2019. The new office is centered around a set of stunning cross-laminated timber (CLT) stairs which utilize a profound gluing technology developed by Timber Structures 3.0 (TS3). This marked the first time TS3 has been used in North America.
Naikoon Contracting Ltd., Canada
Studio 531, Canada
ASPECT Structural Engineers, Canada
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Timber Structures 3.0, Switzerland
The CLT panels were manufactured and pre-treated by KLH Austria. The TS3 gluing technology utilized for this project allows for butt-joint bonded wood products and does not require any nails or screws. This bonding approach is ideal for architects and builders to dream up endless possibilities including long wooden beams, folded structures, and wildly curved lines.
With the help from TS3 experts, Naikoon employees as well as others involved in the structure design took part in an intensive training course devoted to exploring the research and development of TS3 and a hands-on session with the gluing technique. The installation of the stairs also took place with the TS3 team which took a little over a week to complete.
The CLT stair is supported only at the base and the top with a floating landing. Based on the geometry, this required a rigid structure capable of handling bending and torsional moments.
The structure was analyzed in RFEM utilizing the RF-LAMINATE module. RF-LAMINATE allowed to quickly adjust and run various CLT layups in order to analyze the respective behavior and stress distribution.
Because the joints only include a single layer of adhesive, the analysis and design were quite simple compared to other more complex connection types that could have been used for this application.
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- General stress analysis
- Graphical and numerical results of stresses and stress ratios fully integrated in RFEM
- Flexible design with different layer compositions
- High efficiency due to few entries required
- Flexibility due to detailed setting options for calculation basis and extent
- Based on the selected material model and the layers contained, a local overall stiffness matrix of the surface in RFEM is generated. The following material models are available:
- Hybrid (for combinations of material models)
- Option to save frequently used layer structures in a database
- Determination of basic, shear and equivalent stresses
- In addition to the basic stresses, the required stresses according to DIN EN 1995-1-1 and the interaction of those stresses are available as results.
- Stress analysis for structural parts of almost any shape
- Equivalent stresses calculated according to different approaches:
- Shape modification hypothesis (von Mises)
- Maximum shear stress criterion (Tresca)
- Maximum principal stress criterion (Rankine)
- Principal strain criterion (Bach)
- Calculation of transversal shear stresses according to Mindlin, Kirchhoff, or user-defined specifications
- Serviceability limit state design by checking surface displacements
- User-defined specifications of limit deflections
- Possibility to consider layer coupling
- Detailed results of individual stress components and ratios in tables and graphics
- Results of stresses for each layer in the model
- Parts list of designed surfaces
- Possible coupling of layers entirely without shear
- Why are the stresses of the 90° orientation not displayed for a layer with the orthotropy direction 90° for σb,90 in RF‑LAMINATE?
- Which Dlubal Software programs can I use to calculate and design timber structures?
- Which add-on modules and programs do I need for laminate and sandwich structures as well as cross-laminated timber (CLT)?
- Is it possible to design timber structures in RFEM or RSTAB?
- How does the "Orthotropic Plastic" material model work in RFEM?
- Why is it not possible to design any LVL material according to the SIA 265 standard in RF‑/TIMBER Pro?
- How is it possible to display the library of RF‑LAMINATE? We would like to check this is up to date.
- How is the coupling between the individual layers controlled in the RF‑LAMINATE add-on module?
- Can I use surface releases to separate two overlapping surfaces?
- In RF-/TIMBER AWC and RF-/TIMBER CSA, I receive the error that says torsion limit exceeded. How do I bypass this error message?
Programs Used for Structural Analysis
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Deflection analysis and stress design of laminate and sandwich surfaces