Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Density and bending properties of Norway spruce (Picea abies (L.) Karst.) structural timber – Inherent variability, site effects in machine strength grading and possibilities for presorting ; Densitet og bøyeegenskaper til konstruksjonslast av gran (Picea abies (L.) Karst.) – Iboende variasjon, bestandseffekter ved styrkesortering og muligheter for forsortering
Density, modulus of elasticity (MOE) and bending strength (MOR) are the most important properties for structural timber. These properties vary significantly within European species, both between and within countries. The great variations found between sites, between trees within sites, and within single trees make individual strength grading of each single board crucial. Structural timber is graded into strength classes with specific requirements to timber properties. Since most of the strength-grading machines in use account for only a part of the large variation, it is important that the choice of strength classes fit with the wood properties of the raw material used. Therefore, it is necessary to have profound knowledge about the variability of timber properties and to use this information to determine which raw materials are suitable for particular applications. The aim of the study was to investigate the variability in density and bending properties of Norway spruce structural timber to determine site effects on machine strength grading and to determine the possibility of improving machine strength grading by presorting. ; Norges Forskningsråd ; Fondet for Treteknisk Forskning ; Skogstiltaksfondet ; Norsk Skogindustri
Density and bending properties of Norway spruce (Picea abies (L.) Karst.) structural timber – Inherent variability, site effects in machine strength grading and possibilities for presorting ; Densitet og bøyeegenskaper til konstruksjonslast av gran (Picea abies (L.) Karst.) – Iboende variasjon, bestandseffekter ved styrkesortering og muligheter for forsortering
Density, modulus of elasticity (MOE) and bending strength (MOR) are the most important properties for structural timber. These properties vary significantly within European species, both between and within countries. The great variations found between sites, between trees within sites, and within single trees make individual strength grading of each single board crucial. Structural timber is graded into strength classes with specific requirements to timber properties. Since most of the strength-grading machines in use account for only a part of the large variation, it is important that the choice of strength classes fit with the wood properties of the raw material used. Therefore, it is necessary to have profound knowledge about the variability of timber properties and to use this information to determine which raw materials are suitable for particular applications. The aim of the study was to investigate the variability in density and bending properties of Norway spruce structural timber to determine site effects on machine strength grading and to determine the possibility of improving machine strength grading by presorting. ; Norges Forskningsråd ; Fondet for Treteknisk Forskning ; Skogstiltaksfondet ; Norsk Skogindustri
Density and bending properties of Norway spruce (Picea abies (L.) Karst.) structural timber – Inherent variability, site effects in machine strength grading and possibilities for presorting ; Densitet og bøyeegenskaper til konstruksjonslast av gran (Picea abies (L.) Karst.) – Iboende variasjon, bestandseffekter ved styrkesortering og muligheter for forsortering
Fischer, Carolin (Autor:in) / Vestøl, Geir Isak / Høibø, Olav / Øvrum, Audun
19.11.2020
1 b. (flere pag.)
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
Modeling the longitudinal variation of sawn timber grades in Norway spruce (Picea abies (L.) Karst.)
| British Library Online Contents | 2008
Density variations in spruce wood with indented rings (Picea abies Karst)
| British Library Online Contents | 2003
Automatic sorting of spruce (Picea abies (I.) karst.) sawlogs by grade
| British Library Online Contents | 1997