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Assume you are comparing two wood species with identical properties: would the species with the lower...

Assume you are comparing two wood species with identical properties: would the species with the lower fiber saturation point have higher or lower average strength? Why?

Engineering   Civil-Engineering   
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Answer #1

Fiber saturation point (FSP) is the point in drying process where entire free water(sap) is removed. It is around 30% of moisture content. Shrinkage of the wood begins at FSP.

Woods with high extractive content has lower fsp. Extractive content of woods influence the mechanical property of wood. Strength means it is of two category, compressive and bending strength. Teak wood, Rosewood (indian), Rosewood (Brazilian ) ...etc have comparatively good strength properties. It is a common knowledge that rosewood have high Extractive content. But Rosewood have very low FSP. But this variation in strength only evident in lagre variations of fsp. For Rosewood fsp is around 15%. For most of the woods fsp will be around 30%.

If the fsp is low then average strength of the wood will be better.

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