Professional Development · Trades & Technical Skills · Timber Science and Engineered Wood Products

Timber Defects and Their Effects

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Timber defects in structural lumber — knots, slope of grain, resin pockets, reaction wood, checks and shakes, and blue stain: origin, structural impact, and visual grading per DIN 4074.

Inhaltsübersicht

  • Knots and the Knot Area Ratio
  • Slope of Grain, Resin Pockets, and Spiral Grain
  • Reaction Wood and Its Consequences
  • Checks, Shakes, Blue Stain, and Grading per DIN 4074
Cross-section of structural timber showing live knot and dead knot side by side
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Learn Timber Defects and Their Effects — Structural Carpenter – Fundamentals and Practice Trades & Technical Skills | Summary, Flashcards & Quiz