School Building in 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 the 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, 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 are 10 ft 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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In this article, the adequacy of a 2x4 dimension lumber subject to combined bi-axial bending and axial compression is verified using RF-/TIMBER AWC add-on module. The beam-column properties and loading are based on example E1.8 of AWC Structural Wood Design Examples 2015/2018.
Mountain Station of the Klein Matterhorn 3S Cableway During Assembly with Existing Mountain Station on the Left (© Aircam Zermatt)
RFEM Model of the Mountain Station (top) and the Valley Station (Bottom) (© Indermühle Bauingenieure)
Cantilevered New Upper Floor on the Renovated Ground Floor of the School Building in Sutz-Lattrigen (© Indermühle Bauingenieure)
Floor-to-Ceiling Trusses with Steel Diagonals Integrated in Timber-Concrete Composite Floors (© Indermühle Bauingenieure)
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Programs Used for Structural Analysis
Module Extension for STEEL EC3 and RF-STEEL AISC
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