Diemersteiner Tal - Free Form

Customer Project

In 2019, an extraordinary pavilion was constructed in Diemersteiner Tal near Kaiserslautern (Germany). The structure is constructed entirely out of timber and did not require any metal fasteners.

Owner Technical University of Kaiserslautern, Germany
www.uni-kl.de
Architectural Design Jun. Prof. Dr. Christopher Robeller
"Digital Timber Construction DTC"
Technical University of Kaiserslautern
www.uni-kl.de
Structural Design PIRMIN JUNG
www.pirminjung.de
Timber Structure CLTECH GmbH & Co. KG
cltech.de

Model Parameters

Model

The pavilion is located at the Technical University of Kaiserslautern Architecture Faculty’s new timber research campus. The structure serves as the building entrance.

The structural analysis and design for this unique and one-of-a-kind building was carried out by PIRMIN JUNG. For the cross-laminated timber (CLT) surface design as well as the connections, the engineers of PIRMIN JUNG used the finite element program RFEM. The Digital Timber Construction DTC research group at the Technical University of Kaiserslautern was headed by Jun. Prof Dr. Christopher Robeller. This group developed a software to manufacture light timber CLT panel structures.

Structure

The wooden pavilion is approximately 13 ft high and spans over 39 ft. Three large arched wings stem from the domed roof and connect to the foundation. The shell structure consists of 3.94 in. thick CLT panels. Because the components are subjected to little bending and rather mainly to compression, fewer materials were required.

The pentagonal to heptagonal arch components required a mathematical algorithm. More than 200 unique geometrical surfaces about 24 in. in width were created through computer calculations. These small components were manufactured from scrap pieces typically deemed as waste during the production of multi-story building wall elements.

The adjacent panels are connected with glued-in beech dowels and X-fix connectors, which are plywood dovetail-shaped timber-to-timber connectors. The X-fix connectors resist the tension and shear forces resulting from the adjacent in-plane surface displacement. They also ensure a gap-free connection for the panels during assembly. The glued in beech dowels fix the plates and transfer the transverse forces acting perpendicular to the plates.

The entire project was completed in eight weeks short weeks including from the initial planning to the final construction. The production and assembly itself took only eight days. Load tests using six OSB panels with a 4.59 ft height (corresponding to a weight of about 17 tons) were able to verify the dome’s mathematically proven high load-bearing capacity after having completed the construction.

Project Location

Technical University of Kaiserslautern
Erwin-Schrödinger-Strasse 52
67663 Kaiserslautern
Germany

Keywords

Pavilion Cross-laminated timber CLT

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  • Updated 14 January 2021

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