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Direction of Wood Shrinkage

This was one issue on the timber should be known before the process further. Shrinkage of wood is different depending on the location of the log of wood. Closer positions to the heart wood (the center circle of the year) are less depreciation. Would be very useful when we want to create a widening of the board by looking at cross-section of wood and arranged in accordance with the enlargement depreciation so that despite the depreciation of the board is not too much different. The principle of wood shrinks is larger to the heart of timber. This is because the pore structure of wood is more directed to the center of the log. And the final form due to depreciation a variety of: curve, twist, trapezoidal. We can see that some part the direction greatest contraction that may occur. The other may indicate the direction of smaller shrinkage. From various forms of sawn timber sectional basis we can predict which part will experience a change in shape so that the location and quality of the wood components can be determined early. In some types of wood will be somewhat difficult to see the wooden cross. Could be done with another way of seeing the shape and direction of the wood fiber surface, that are fiber cut in the tangential, radial or longitudinal. If on the broad side wood of a tangential, wood is likely to shrink toward the thick side.

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