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Wood Properties

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Jos¨¦ Miguel Fern¨¢ndez
Jos¨¦ Miguel Fern¨¢ndez

This is a small PowerPoint presentation I used last season at classroom with my students of 1? E.S.O. (12-13 years old), introducing wood properties.

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Wood properties We are going to study how wood behaves in different situations
Wood properties Wood has not fixed properties. Even pieces from the same tree are different . We will study general properties of wood, those that influences in its applications. 09/04/10 J.M.F.
1 ¨C Density. Density is the relationship between the mass and the volume of a piece of wood. Usually, all kinds of woods are lighter than water; that¡¯s why they float on water 09/04/10 J.M.F.
2 ¨C Hardness. Hardness is the opposition that a given material has to be scratched by other harder material. Wood hardness depends on its water content. 09/04/10 J.M.F.
3 - Stress strength. Is the most important property when you have to choose a wood for an application. Is the wood capacity to support an effort There are three different efforts Compression Flexion Traction 09/04/10 J.M.F.
4 ¨C Other properties. Heat conductivity Electrical conductivity Shinyness Colour 09/04/10 J.M.F.

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Wood Properties

  • 1. Wood properties We are going to study how wood behaves in different situations
  • 2. Wood properties Wood has not fixed properties. Even pieces from the same tree are different . We will study general properties of wood, those that influences in its applications. 09/04/10 J.M.F.
  • 3. 1 ¨C Density. Density is the relationship between the mass and the volume of a piece of wood. Usually, all kinds of woods are lighter than water; that¡¯s why they float on water 09/04/10 J.M.F.
  • 4. 2 ¨C Hardness. Hardness is the opposition that a given material has to be scratched by other harder material. Wood hardness depends on its water content. 09/04/10 J.M.F.
  • 5. 3 - Stress strength. Is the most important property when you have to choose a wood for an application. Is the wood capacity to support an effort There are three different efforts Compression Flexion Traction 09/04/10 J.M.F.
  • 6. 4 ¨C Other properties. Heat conductivity Electrical conductivity Shinyness Colour 09/04/10 J.M.F.