LaNaSys: Development of a material and energy efficient timber construction system made from hardwood and softwood
A research project in TUM.wood network
Problem description
The aim of this project is to make a contribution to the material-efficient and sustainable use of the local availble wood resource in modern timber construction. The project focuses on the further development of cross-laminated timber components. The production and use of this wood building product has increased exponentially over the last 20 years and further increase is prognosted. The components have so far been made almost exclusively from softwood, a resource that will become more scarce. Due to the large production volumes, the components are particularly suitable for integrating large quantities of hardwood with currently hardly usable qualities.
Goal of the project
The project is going to achieve the following goals:
- Development of resource-optimized cross-laminated timber components with and without bonding to concrete
- through discontinuous laying of the inner board layers and simultaneous integration of fire stop layers made of modified cottonide
- using previously unused hardwood assortments for the middle layers, in particular juvenile beech wood, insect-damaged oak planks and/or sawn wood with a high proportion of sapwood and residual rolls and planks from veneer production
- by solving the fundamental questions regarding the production of hybrid cross-laminated timber (HBSP) for ceiling components with and without composite, with one- and two-axis load-bearing effects and optimal integration of prestressing strands or TGA in the cavities
- while simultaneously specifying all fire protection, building physics and mechanical performance characteristics
- and the provision of a company-neutral general national or European approval for the manufacture and use of the components in practice
- and the presentation of possible applications with an assessment of the expected economic efficiency and assessment of the sales potential for the product.
An extension to wall and roof components is reserved for subsequent projects. A special feature is the cross-disciplinary approach within the TUM.wood network, a professional association of several professorships at the Technical University of Munich that deal with wood. This ensures a coordinated, holistic view. To address concrete technology issues, the consortium is supplemented by the TUM Professorship for Materials and Materials Testing.
Duration: 03/2021 – 09/2024
People:
WP4: Research Group Resource Flow Management, Chair of Wood Science: Omar Hijazi, Klaus Richter
The WP4 “Efficiency Analysis” consists of the sub-WPs:
- WP4.1. Determination and forecast of raw wood supply
- WP4.2. Material flow balances of the LaNa ceiling system
- WP4.3. Efficiency assessment regarding ecological and economical aspects
- WP4.4. Comparative assessment
Cooperations partners
- Lehrstuhl für Architektur und Holzbau (Projektleitung)
- Lehrstuhl für Holzbau und Baukonstruktion
- Lehrstuhl für Biogene Polymere
- Professur für Holztechnologie (Holzforschung München)
- Lehrstuhl für Werkstoffe und Werkstoffprüfung im Bauwesen
- Industriepartner Pollmeier Massivholz GmbH & Co. KG
und weitere Praxispartner
Granted by
Federal Ministry of Food and Agriculture (BMEL)
with the project support by the Agency of Renewable Resources (Nachwachsende Rohstoffe) e. V. (FNR)