1. Fra Sverresborg folkemuseum The log-house as a building system facilitates: - Replacements of components - Reconstruction - Relocation Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

2. Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

3. Norsk Massivtre www.norskmassivtre.no Massive wood – a monomaterial Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

4. Carbon-storage in biomass All growing biomass transforms CO 2 from the air to glucose The carbon is chemically bonded till the material burns or decomposes More biomass material used in buildings could moderate the effects of the rising CO 2 - content in the atmosphere Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

5. Concrete, wood studs and massive wood, lifecycle: 50 years Source: GAIA architects CO 2 -balance for different construction types, debit (impacts of energy use and materials production) and credit (carbon storage in biomass) Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

6. www.holz100norge.com Large, custommade components have low generality Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

7. Architect: Bjørn Berge, GAIA Lista Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby “Klimablokken” prototype

8. Raw materials Local and low-grade wood such as stubs and reclaimed waste Environmental efficiency Low impacts in production phase Low energy need in user phase Reuse/ recycling Heat recovery User needs Self-building option Adaptability in user phase Low costs Woods’ material properties Indoor air quality Thermal insulation Carbon storage Production line Work adaptation Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby Design-criteria for the Stavne Timber Block:

9. Generality; 6M norm Smaller size; easy handling high generality simple energy recovery Connection points accesibility parallell disassembly Product information Potentials for improving the prototype: Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

10. Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

11. Reclaimed wood Ca. 500 000 tons per year in Norway Expected to increase Ca. 70 % energy recovery Landfill prohibited from 1. July 2009 Wood waste at Franzefoss (Foto: K. S. Wigum) Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

12. Material supply, Stavne Timber Block Illustrasjon: Kristin Støren Wigum Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

13. Indoor air quality Heat insultation Carbon storage Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby Material properties of wood

14. Technical properties of wood are variable according to the direction of the wood fibre cells Proposed new dimentions: 100x200x300 mm Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby Maximum structural strength Maximum moisture transport Minimum moisture elasticity Maximum moisture elasticity Maximum thermal insulation capacity

15. 1.Node connection + High flexibility -Requires high precision -Moisture elasticity can cause problems -Complicated building prosess? Cog -joints Source: Sintef Byggforsk Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

16. 2. Prestress bonding + Structural stability + Requires less precision - Lower flexibility for construction and changes - Steel should be avoided Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby SRB-DUP prestressed dry-masonry Source: Yamaguchi 2007

17. 3. Independent load bearing structure + Simplifies structural calculations + Moisture elasticity less problematic + High flexibility of infill-partitions - Complicated production? ”Sleppverk” - principle Source: Dag Nilsen, NTNU Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

18. 4. “Timber masonry” + The mortar works as filling + Requires less precision - The mortar fillets can be cold bridges - Complicated building prosess? Cow-barn at Ner-Skjørstad, Oppdal 1840 Source: Christian Hemmingsen Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

19. Constructional challenges The block must provide structural stability locally within each block and globally within the system Some basic aspects disregarding construction type: The direction of the structural stress on the system The fastening of the dowels The fastening of the boards Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby

20. Massive wood: - building material of tomorrow? Component design: Module based Small/ medium size Low/ medium technology Local production Developing the Stavne Timber BlockCMS-conference Twente June 2009, Anne Sigrid Nordby