The moisture content of timber is determined as follows:
W1 - W2
P = -----------------
W2
where,
P = Percentage of moisture,
W1 = Original weight of timber, and
W2 = Oven-dry weight of timber.
The samples of timber are taken in the form of pieces having dimensions of 50 mm x 50 mm x 25 mm. The test piece is taken and weighed fresh. It is then dried in an oven at a temperature of 103 C + 2% The weight of test piece in the oven is regularly observed till the variation in last two consecutive observations does not exceed O.OO2gm. The test piece is then considered to be oven-dry and its weight is noted.
The oven-dry method of determining moisture content is a standard method. But for field observations, electronic instruments are available for readily working out the moisture content of timber.
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