Wood can be broadly categorized into two types, namely hardwood and softwood.
Hardwoods are deciduous
trees with broad leaves, and have their leaves shed during the winter.
Softwoods are
conifers with needlelike leaves. Unlike hardwoods, softwoods are generally
evergreen.
Wood may exhibit
different mechanical properties, not only from species to species, but also
within the same species. This is due to the potential difference in terms of
their growth conditions and environment.
Other than the
above classification, we may also include several species with similar
properties into one species group.
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