1 / 6

Wood Quality - Definitions

Wood Quality - Definitions. A measure of the aptness of wood for a given use. A measure of the characteristics of wood that influence the properties of products made from it.

hop
Télécharger la présentation

Wood Quality - Definitions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Wood Quality - Definitions • A measure of the aptness of wood for a given use. • A measure of the characteristics of wood that influence the properties of products made from it. • A changeable attribute that is characterized by a dynamic balance among intrinsic properties, economic value and consumer satisfaction over a period of time. • The resultant of physical and chemical characteristics possessed by a tree or part of a tree that enables it to meet the property requirements for different end products. In other words, the intrinsic quality of wood evaluated solely in terms of its suitability for various products or end uses.

  2. influences determines determines influences ForestryManagementOptions TreeGrowth WoodProperties TechnicalPerformance AcceptanceFor End Use influences influences Size Cost of managementand silviculture influences influences Price

  3. * Foresters’GrowthWoodTechnicalOptionsCharacteristicsPropertiesPerformanceCultivate a) Stem form 1. Density StrengthIrrigate (i) size 2. Texture Drying behaviourFertilize (ii) straightnessImprove stock (iii) taper 3. Grain direction Stability in servicePlanting distance b) Branching 4. Knot size and number Sawing and machiningJuvenile spaceThin c) Ring structure 5. Fiber characteristics Mechanical fasteningPrune (i) juvenile wood d) Spiral grain UniformityChoose rotation age (ii) reaction wood Decay resistance Treatability

  4. Wood properties 1. Density 2. Texture 3. Grain direction 4. Knot size and number 5. Fiber characteristics (i) juvenile wood (ii) reaction wood Technical performance Strength Drying behaviour Stability in service Machining Mechanical fastening Uniformity Decay resistance Treatability *

  5. Growth characteristics (a) Stem form (i) size (ii) straightness (iii) form (b) Branching (c) Ring structure (d) Spiral grain Wood properties 1. Density 2. Texture 3. Grain direction 4. Knot size and number 5. Fiber characteristics (i) juvenile wood (ii) reaction wood *

More Related