TIMBER Living tree, yielding good timber is called standing timber. After felling and separating branches it is known as rough timber. When bark is removed and stem is roughly converted into pieces of suitable length it is known as log. After the log is seasoned and converted into commercial sizes like planks, battens, posts and beams, it is known as converted timber. Classification 1. On the basis of mode of growth timber is classified as exogenous and endogenous. Exogenous trees grow outward adding a distinct ring every year while endogenous trees grow inwards. Example of exogenous trees are mahogony, sal, teak , babul while examples of endogenous trees are bamboo and cane. Exogenous trees are further classified as coni ferous and deciduous. Coniferous trees have cone shape and their leaves do not fall till new ones grow. Deciduous trees have broad leaves and they fall in autumn and new ones appear in the spring. In the cross section of deciduous trees the following components a...
Civil engineering materials of construction timber