Abstract
Shrinkage observed on small clear specimens in radial and tangential directions and volumetric shrinkage obtained under the evaluation of physical and mechanical properties of wood have been analysed with reference to specific gravity and fibre-saturation point (FSP). It is observed that tangential shrinkage is 1.4 to 3 times that of radial shrinkage. The difference between FSP in radial and tangential direction is not so predominant; it is possibly governed by variation in specific gravity of the wood substance. The volumetric shrinkage is noted to be approximately equal to the sum of radial and tangential shrinkages. Shrinkage is found to depend on both the specific gravity of wood and FSP. Unlike Stamm's theory, their effect is found to be additive. The effect of specific gravity is found to be more than the effect of FSP.
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