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Volume yield and profit in the production of clear finger-jointed Scots pine (Pinus sylvestrisL.) boards
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Virkeslära)
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Virkeslära)ORCID iD: 0000-0002-8824-5090
2010 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, Vol. 68, no 2, p. 189-195Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Berlin / Heidelberg: Springer , 2010. Vol. 68, no 2, p. 189-195
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:vxu:diva-7051DOI: 10.1007/s00107-009-0367-4ISI: 000277138900009Scopus ID: 2-s2.0-77954500541OAI: oai:DiVA.org:vxu-7051DiVA, id: diva2:292811
Available from: 2010-02-09 Created: 2010-02-09 Last updated: 2022-07-14Bibliographically approved
In thesis
1. Ställ krav på virket: Rätt virke för produktion i framtidens trähusfabrik
Open this publication in new window or tab >>Ställ krav på virket: Rätt virke för produktion i framtidens trähusfabrik
2011 (Swedish)Licentiate thesis, comprehensive summary (Other academic)
Abstract [sv]

Denna avhandling behandlar den svenska trähusbranschens behov och möjligheter att erhålla trämaterial med egenskaper som uppfyller de krav som produktion och slutkund ställer. Ett gemensamt problem för den svenska trähusbranschen är de kvalitetsbrister hos det virke sombranschens företag köper för sin produktion, som kan resultera i merkostnader för branschen med 100 MSEK årligen.

Trähusföretagen uttrycker en viss uppgivenhet över bemötandet från virkesleverantörerna. Virkesleverantörerna å sin sida menar att köparna av trämaterial inklusive företagen i trähusbranschen i ringa utsträckning genomför reklamationer. Avgörande för genomförda virkesaffärer är ofta priset – det blir affär med den som erbjuder lägst pris. Sammantaget innebär detta att det inte blir någon dialog mellan leverantör och köpare som utvecklar synsättet på trämaterialkvalitet.

Avhandlingsarbetet har bland annat behandlat beredning av träråvaran till färdiga ämnen t.ex. studier vid tillverkning av kvistfria ämnen. Resultatet av arbetet visar på vikten av att genomföra utvärderingar av material och leverantörer. Resultatet visar vidare att kapkostnaden för färdiga träämnen inkl. spill är ca 1/3 av ämneskostnaden. Dock är kostnaden för trämaterialet låg i relation till totalkostnaden för det färdiga huset vilket innebär att ett högre pris för ett virke som fullt ut motsvarar kravspecifikationerna i liten utsträckning påverkar totalkostnaden för huset.

Råd till trähusbranschen är att ställa krav på virkesråvaran, utvärdera material och leverantörer samt att trähusbranschen ska sikta mot att bli en modern tillverkningsindustri i likhet med de mest framgångsrika inom verkstadsindustrin.

Abstract [en]

This thesis investigates the needs and opportunities for the Swedish wood house industry to obtain wood material with properties meeting demands of both producers and final customers. A common problem within the Swedish wood house industries is the insufficient quality of the wood material that companies purchase for their production. These flaws in quality can render an additional annual cost for the industry of approximately 10 million Euros.

Wood house companies express a certain resignation regarding communication with wood material suppliers. However, timber suppliers claim that they rather receive very few complaints regarding timber quality from wood house companies and other purchasers. For a timber supplier, being able to offer an acceptable price is often a determining factor, since most deals will go to the supplier offering the lowest price.

This has led to a non-existent dialogue between suppliers and purchasers regarding how to approach the wood quality issue. This study has, among other things, studied the preparation of sawn wood into finished components, for instance, the production of knotfree boards. The results illustrate the importance of carrying out evaluations of raw material and suppliers. Furthermore, results show that the cutting cost for wood components, including waste is approximately 1/3 of the total cost for ready-made components. However, in relation to the total cost of the house the timber cost is low. This means that a higher price for wood that fully meets the target specifications, will have limited impact on the total cost for the house.

The wood house industry is recommended to present firm demands for a high-quality material and to evaluate material and suppliers. In addition to this, the wood house industry should aim towards becoming a modern manufacturing industry, like those most successful manufacturing industries in other fields.

Place, publisher, year, edition, pages
Växjö: Institutionen för teknik, Linnéuniversitetet, 2011. p. 48
Series
Rapporter: Institutionen för teknik, Linnéuniversitetet ; 6
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
urn:nbn:se:lnu:diva-12409 (URN)978-91-86491-89-5 (ISBN)
Available from: 2011-10-21 Created: 2011-06-13 Last updated: 2017-09-05Bibliographically approved
2. Some aspects on quality requirements of wood for use in the industrial manufacture of single-family timber houses
Open this publication in new window or tab >>Some aspects on quality requirements of wood for use in the industrial manufacture of single-family timber houses
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Linnaeus University Press, 2014. p. 54
Series
Linnaeus University Dissertations ; 174
National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-110834 (URN)9789187427886 (ISBN)
Public defence
2014-05-16, N1017, Hus N, Växjö, 10:00 (English)
Opponent
Available from: 2022-03-16 Created: 2022-03-16 Last updated: 2024-02-07Bibliographically approved

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Publisher's full textScopushttp://www.springerlink.com/content/hvh075177126533g/?p=0e6a523c97b14aca8bb0367d14158232&pi=0

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Eliasson, LarsKifetew, Girma

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