School Building Sutz-Lattrigen, Switzerland
The school building addition in Sutz-Lattrigen was built on the existing foundation floor. This foundation was not designed to withstand a second story. Therefore, the loads from the first floor and the additional second story had to be designed as concentrated loads. In order to reduce weight but also for educational and sustainability reasons, timber was used in the construction of the new building.
Municipality of Sutz-Lattrigen, Switzerland
Bauzeit Architekten, Biel, Switzerland
Lanz Architekten, Sutz-Lattrigen, Switzerland
Indermühle Bauingenieure, Thun, Switzerland
|Civil Engineering of Reinforced Concrete||
Emch + Berger AG, Bern, Switzerland
|Timber Construction Company||
Wenger Holzbau AG, Steffisburg, Switzerland
Model Data of Primary Two-Story Structure
Indermühle Bauingenieure from the Swiss town of Thun was responsible for the timber engineering during the project phase including from the preliminary project to the supervision of the final design. The firm also completed the 3D project planning on behalf of the timber construction company. RFEM was utilized for the structural analysis.
The additional floor consists of floor-to-ceiling trusses in the longitudinal and transverse directions. The truss diagonals are glued-laminated timber while the chords are steel. The chords are integrated in the timber-concrete composite floors.
The diagonals are connected with dowels and internal steel plates. The second floor cantilevers 10ft in the longitudinal direction and 13 ft in the transverse direction over the first floor.
The visible timber structure as well as the glazed exterior and interior walls create an intimate, open atmosphere.
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The cross-section resistance design analyzes tension and compression along the grain, bending, bending and tension/compression as well as the strength in shear due to shear force.
The design of structural components at risk of buckling or lateral-torsional buckling is performed according to the Equivalent Member Method and considers the systematic axial compression, bending with and without compressive force as well as bending and tension. Deflection of inner spans and cantilevers is compared to the maximal allowable deflection.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads.
Design-relevant parameters such as the stability analysis type, member slendernesses, and limit deflections can be freely adjusted.
- For line releases, I obtain the resultants in the horizontal direction, which I cannot understand.
- When I apply an area load to a surface with an opening, the load is not not accounted for at the opening. Is it possible to automatically consider the area load as a line load around the opening perimeter?
- I just have to calculate an open hall with low roof loads and relatively high wind loads compared to it. In theory, a design of the bottom flange for buckling/toppling would have to be performed. Unfortunately, there is no combination of 1.0 * G +1.5 * W.
- How do I get the largest column load in my RFEM 3D model?
- I have defined temperature loads, strain loads, or a precamber. As soon as I modify stiffnesses, the deformations are no longer plausible.
- Can the properties, such as B. the cross -section or the surface thickness as well as the material of a surface of an existing element for a new element?
- In RF-/TIMBER AWC and RF-/TIMBER CSA, I receive the error that says torsion limit exceeded. How do I bypass this error message?
- Why is the strength always reduced by the kmod value of 0.6 during the calculation in the RF‑LAMINATE add‑on module, although I have load combinations with variable loads?
- Can I consider a reduction of the stiffness according to the German regulation NCI NA.5.9 in TIMBER Pro?
- I have selected all available members for design in RF-/TIMBER Pro. Why are tapered members not designed?
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
Design of steel members according to the Swiss standard SIA 263
Fatigue design of members and sets of members according to EN 1993-1-9
Timber design according to Eurocode 5, SIA 265 and/or DIN 1052