lumber Timber

Description

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The word “timber” refers to all harvested wood, including heavy timbers, members used in light-frame construction and chopped logs. There are two types of timber: softwood and hardwood. Frequently, the phrase only refers to goods made from sawlogs in a sawmill. Debarking, sawing into boards or slabs, resawing into thinner boards of different sizes, edging, crosscutting to square the ends and remove faults, grading according to strength and appearance and drying in kilns or outside are the steps involved in converting logs into sawed timber. The wood is better prepared for finishing when it is dried below the fiber-saturation threshold, which causes shrinkage and generally increases strength, stiffness, and density. Preservatives are frequently used to shield wood against corrosion and disintegration.