ZIMSEC · A Level
Wood Technology and Design
6 topics6 with notes
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Form 5 · Lower 6 4 topics
- Wood science: structure, moisture and properties MC (%) = (wet mass − oven-dry mass) ÷ oven-dry mass × 100.
- Conversion, seasoning, preservation and forestry Through-and-through (plain) sawing – economical, more figure but more distortion; quarter sawing – stable boards, attractive ray figure, more waste; tangential sawing.
- Manufactured boards and adhesives Advantages: large sizes, stability, use of waste wood, uniform properties. Disadvantages: edges need lipping or banding, some are weak in moisture, formaldehyde emissions.
- Woodworking machinery and cutting theory Circular saw bench, band saw, surface planer, thicknesser, spindle moulder, router, mortiser, lathe, CNC router and panel saw.
Form 6 · Upper 6 2 topicsExam year
- Furniture design, construction and finishing Function, ergonomics (seat height about 430–450 mm, table height about 720–760 mm for adults), anthropometrics, strength, stability, aesthetics, materials, construction method, cost and production volume.
- Production planning, costing and enterprise Working drawings, cutting lists and material schedules, flow charts of operations, jigs and templates, and batch scheduling.