Summary

• Description:

  The PDF document comprises Grade 10 Woodwork Strand 2 Materials Notes. The MS Word version (editable) is also available upon your request.

  It covers the following strands and sub-strands:

  • Strand 2.0: Materials
    • Sub-strand 2.1: Growth of Timber Trees
      • The Process of Growing Timber Trees: Biological processes including photosynthesis, cell division in the Cambium layer, and the life cycle from seedling to mature tree.
      • Classification of Timber Trees: Distinction between Softwoods (Gymnosperms, needle-leaved, evergreen) and Hardwoods (Angiosperms, broad-leaved, deciduous).
      • Macrostructure of Wood: Detailed examination of the trunk cross-section including Pith, Heartwood (dead support cells), Sapwood (living transport cells), Cambium Layer, Bast (Phloem), Bark, and Medullary Rays.
      • Importance of Growing Trees: Environmental roles such as acting as Carbon Sinks, preventing soil erosion, and protecting water catchment areas.
    • Sub-strand 2.2: Timber Conversion and Seasoning
      • Transportation of Timber Logs: Methods of moving logs from the forest including Skidding, Hauling (trucks), and Water Transport.
      • Timber Conversion: Methods of sawing logs into market sizes:
        • Through and Through (Plain) Sawing: Simple, cheap, but prone to cupping.
        • Quarter (Radial) Sawing: Stable, reveals medullary rays (figure), but expensive and wasteful.
        • Tangential Sawing: Specific for flooring to resist wear.
      • Timber Seasoning: The process of removing excess moisture. Comparison of Natural Air Seasoning (stacking with stickers) and Artificial Kiln Seasoning (controlled oven). Understanding Equilibrium Moisture Content (EMC).
      • Defects in Seasoning: Identification of faults caused by uneven shrinkage: Cupping, Bowing, Twisting, Springing, End Splitting, and Surface Checks.
    • Sub-strand 2.3: Adhesives
      • Classification of Adhesives:
        • Natural Adhesives: Animal Glue (Scotch glue) and Casein (Milk) glue.
        • Synthetic Adhesives: Polyvinyl Acetate (PVA/White glue), Contact Adhesive (Impact glue), Epoxy Resin (two-part), Cyanoacrylate (Super Glue), and Urea Formaldehyde (Cascamite).
      • Properties of Adhesives: Understanding Thermoplastic vs. Thermosetting, Water Resistance grades (D1 to D4), Pot Life, and Setting Time.
      • Application Process: Steps for a strong bond: Surface Preparation (clean/dry), Application (even spreading), Clamping (pressure), and Curing.
      • Safety Measures: Ventilation for solvents, PPE (gloves/masks), and fire safety hazards associated with adhesives.
• File Size:

  861.51 KB
• Length:

  29 pages
• Category:

  Lesson Notes
• Level:

  Grade 10
• Subject:

  WOODWORK
• Posted By:

  Caleb_Peter

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