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| The mass of over
30 different species of wood are listed below. While the data is useful
for the design and selection of wood, individual samples will differ.
Moisture content will have a marked influence. As 1000kg of pure water = 1 cubic metre, those materials under 1000kg/cubic metre will float; more dense will sink ie. those materials with a specific gravity more than 1. Pure water was chosen as the 'base line' for specific gravity and given the value of 1. The specific gravity of all other materials are compared to water as a fraction heavier or lighter density. For example, afromosia has a specific gravity (sg) of 0.705 while ebony can have a sg of 1.12 (1120 kg/cu.m) (see table below) As specific gravity is just a comparison, it can be applied across any units. The density of pure water is also 62.4 lbs/cu.ft (pounds per cubic foot) and if we know that a sample of apple has a sg of 0.73 then we can calculate that its density is 0.73 x 62.4 = 45.552 lbs/cu.ft. Note, kg/cu.m divided by 16.01846 = lbs/cu.ft |
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We have tried
to be accurate with the above table but cannot be held responsible for
inaccuracies. |