Wood

usually from deciduous trees, which lose their leaves in autumn, although some hardwood (for example, tropical hardwood) comes from other types of tree

• hardwood

• softwood

• solid wood

• engineered wood

from coniferous trees, which remain green throughout the year

• hardwood

• solid wood

• softwood

• engineered wood

softwood or hardwood that has been sawn into specific shapes and sizes, but whose natural structure, consisting of grain and knots, remains intact

• engineered wood

• softwood

• hardwood

• solid wood

made by bonding (sticking together) layers of solid softwood or hardwood, or by mixing quantities of wood particles and bonding them with resin.

• softwood

• engineered wood

• solid wood

• hardwood

advantages of wood

• lack of fire resistance

• prone to rotting

• good manufacturability (ease of processing and manufacturing of products)

• heterogeneity of structure

disadvantages of wood

• relatively high strength

• high specific strength

• low temperature coefficient of linear expansion

• hygroscopicity, i.e. ability to absorb moisture, and instability of properties and dimensions arising from changes in humidity (shrinkage and swelling)

cheap, low-strength boards, such as particle board (often called chipboard) and medium-density fibreboard (MDF)

• Particle board or chipboard

• Orientated strand board (OSB)

• Plywood

stronger boards suitable for structural use - primarily orientated strand board (OSB), which is made from strands of wood bonded with resin, and plywood

• Plywood

• Particle board or chipboard

• Orientated strand board (OSB)

glue-laminated sections - sometimes called glulams - which can be used as major structural elements, such as beams, in large buildings.

• Particle board or chipboard

• Plywood

• Orientated strand board (OSB)

what is shown in the picture

• Orientated strand board (OSB)

• Particle board or chipboard

• Plywood