Unit 4. Wood
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This document discusses the process of obtaining wood from trees. It describes the 7 main steps: 1) fell the tree, 2) prune branches, 3) transport logs, 4) remove bark, 5) cut into boards, 6) wash and dry boards, 7) plane boards. It also covers the classification of wood into hardwoods from deciduous trees and softwoods from coniferous trees, as well as by-products made from wood such as prefabricated woods and cellulosic materials.
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types of commercial Timber
This document provides information about various types of timber and timber products. It begins by listing various types of trees and their characteristics, locations found, and common uses. It then describes different timber products including plywood, laminates, veneers, blockboards, particle boards, and fiber boards. For each product, it discusses the manufacturing process, types, properties, advantages, disadvantages, and market rates. The document provides a detailed overview of different timber sources and products used in interior design and construction.
Woods Presentation
This document provides an introduction to woodworking, including different types of trees, lumber, and terminology. Hardwoods are deciduous trees that drop their leaves annually, while softwoods are coniferous trees that retain needles year-round. Lumber can be cut as quarter sawn, plain sawn, or rift sawn. Manufactured wood panels like plywood and oriented strand board are also discussed. Basic hand tools, power tools, and safety rules for working with tools are outlined. Project planning steps like defining the goal and developing drawings are reviewed.
WOOD
This document provides information about various types of wood and timber. It discusses hardwoods which come from broad-leaf deciduous trees like oak. It also discusses softwoods which come from coniferous trees that do not lose their leaves. Softwood is used widely in construction. Manufactured boards like plywood and MDF are also described, which are made from gluing wood layers or fibers together. The document also covers wood properties, classifications, elements of a tree, defects in timber, and uses of different wood types.
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Creep is defined as time-dependent inelastic strain under sustained load and elevated temperature. Creep testing involves subjecting metal specimens to high stress and temperature to produce time-dependent inelastic strain. The creep curve exhibits three stages: primary, secondary, and tertiary. Creep is affected by stress, temperature, and time based on empirical formulas. Creep behavior is more complex for nonmetals like concrete and wood due to additional factors like aging, moisture content, and anisotropy. Creep testing and modeling helps understand material deformation over long periods under load.
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Timber-II
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Unit 4. Wood
- 1. TechnologyDepartment UNIT 4: WOOD
- 5. PROPERTIES OF WOOD (ii)
- 6. PROPERTIES OF WOOD (iii)
- 8. Process of obtainingwood 1. FELL Wefellthetreewithanaxeor a powersaw.
- 9. Process of obtainingwood 2. PRUNE Wecutthebranches of thetreewithanaxeor a powersaw.
- 10. Process of obtainingwood 3. TRANSPORT Logs are transportedbyroadtransport, traintransportorrivertransport.
- 11. Process of obtainingwood 4. TAKE THE BARK OFF Wetake off thebark of a treewithmechanicalrollers.
- 12. Process of obtainingwood 5. CUT INTO BOARDS Wecutbranches and trunksintoboards of differentsizes.
- 15. Process of obtainingwood 7. PLANE Weplaneboardstomakethesurfacesofter. MANUAL MECHANICAL
- 16. STREAKS AND KNOTS In thewood, we can see: STREAKS: They are therings of thethree. KNOTS: They are the places wheretherewere a branch. KNOTS STREAKS
- 18. Thicktrunks
- 19. Great variety of colours.
- 20. Veryresistant.
- 23. Slimtrunks
- 24. Pale colours.
- 25. Easytowork.
- 29. Cheap
- 30. Badlooking
- 31. Light
- 33. Veryresistant
- 34. Heavy
- 35. Verytenacious