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Timber is one of the oldest and most versatile materials used in the field of building services and maintenance. It has been widely employed in construction for structural, finishing, and decorative purposes. Its popularity lies in its ease of working, durability, thermal resistance, and natural aesthetic appeal. In building services and maintenance, timber is used for doors, windows, flooring, partitioning, roofing, scaffolding, joinery, and furniture. However, for practical use, timber is classified into different categories to understand its properties, durability, and suitability for specific purposes. The classification of timber can be carried out in multiple ways: based on origin, mode of growth, conversion, durability, moisture content, and uses. Each classification helps builders and maintenance professionals select the right type of wood for different functions, ensuring efficiency, safety, and longevity of structures. One of the most common classifications is based on the origin of timber. Broadly, timber can be divided into two categories: natural timber and industrial or artificial timber. Natural timber refers to wood obtained directly from trees. This includes hardwoods and softwoods. Hardwoods are derived from broad-leaved deciduous trees, while softwoods come from coniferous or needle-leaved trees. Examples of hardwoods include teak, sal, oak, mahogany, and rosewood, all known for their density ________ _______ _______ __________ _______ ________ _________ ______.
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