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课程 7 · 年级 12+
Wood and furniture: joiner basics
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The joiner works with wood: solid (oak, beech, spruce), boards (chipboard — cheap, for carcasses), MDF (smooth — for painting). Joints: screws+dowels, wood glue (PVA — stronger than wood), groove+tongue (classic), lamellos. Saws: circular saw, jigsaw (curves), handsaw. The rule: "never toward you, always away".
- ●Wood moisture ~8–12% for furniture: wet wood warps indoors
- ●Wood glue fills the joint and holds stronger than wood — but not metal
- ●Sand along the grain: across leaves scratches forever
🟦 The German joiner makes furniture, windows, stairs — "everything from wood". The Meister business is protected: only a Meister may run the firm.